You don’t have to grow tobacco to have reason to worry about tobacco mosaic virus.
Tomatoes are highly susceptible to this disease that can be carried on tools, clothing, cigarettes, and, yes, even the saliva and other bodily excretions of smokers. This tenacious virus can stay alive even after its host is dead, and it can withstand extreme temperatures.
Tobacco mosaic virus host plants
In addition to tomatoes and tobacco, the tobacco mosaic virus (TMV) has been found on over 350 different plant species, including cucumbers, many flowers and ornamental plants, and all members of the nightshade family, such as eggplant, potatoes, groundcherries, tomatillos, and peppers. While they may not show symptoms, grapes and apple trees can also become infected.
Symptoms of tomato mosaic virus
Tobacco mosaic virus starts out as nothing more than paler than normal green between the veins of young leaves. This lightened area quickly becomes mottled, leaving a green, white, or yellow mosaic pattern. Bumpy wrinkles may also appear, in a behavior known as rugosity, and leaves may appear distorted or stringy, or exhibit cupping.
Leaf veins may also turn yellow, and yellow streaking on the leaves may also occur. Many of these symptoms can be mistaken for signs of chemical overspray, but the mosaic pattern is usually distinct enough to rule this out. While this disease does not kill plants, it can stunt them severely. Infected leaves soon die, leaving dead patches in the plant and reducing production by up to 20%. Fruit that is produced is often discolored and deformed.
How is tobacco mosaic virus spread?
Unlike many other diseases, which are spread by sap-sucking insects, such as thrips and aphids, tobacco mosaic virus is mostly spread by direct contact. Tobacco mosaic virus has also been spread by chewing insects, such as grasshoppers and caterpillars, and by bumblebees, as they pollinate flowers.
Preventing tobacco mosaic virus
Plants infected with tomato mosaic virus must be removed and destroyed. According to the Michigan State University Extension, you can prevent the virus from moving onto uninfected plants by spraying them, just before transplanting, with a 20% nonfat dry milk solution. This spray can also be used on containers, walkways and other surfaces. The milk solution coats the virus, rendering it inactive. The milk treatment only works while the milk is wet.
These other tips can also help reduce the likelihood tobacco mosaic virus in your garden:
*Check plant labels for the letters V, F, N, T or A. These symbols indicate a resistant to verticillium wilt, fusarium wilt, nematodes, tobacco mosaic virus or alternaria stem canker, respectively.
According to a study conducted by the National Institutes of Health, all brands of cigarettes studied tested positive for tobacco mosaic virus, while only 53% of those viruses were viable. Also, 45% of the saliva samples taken from smokers tested positive for tobacco mosaic virus. So, smokers and users of other tobacco products, please wash your hands before entering your (or someone else’s) garden, and always throw your butts in the trash. Thank you.
While it may sound like a short, reckless redhead, tomato bushy stunt is a viral disease of tomatoes. The strange thing is, we don’t yet know where it comes from or how it gets to our tomato plants.
Most diseases are spread by vectors, often sap-sucking or leaf chewing insects. When it comes to tomato bushy virus, we don’t know how it spreads, though many experts believe it may be spread through irrigation water. Contaminated seed, sewage, and tools may also be guilty.
The virus is thought to enter plants through damaged roots. And tomatoes are not the only plants at risk.
Tomato bushy stunt host plants
First identified in tomatoes in 1935, this is not an economically significant disease, but it can cause problems in your home garden if it gets established. Apples, artichokes, cherries, grapes, hops, sweet peppers, chili peppers, eggplant, and tulips can also become infected, and the virus can cause severe leaf dieback of many lettuce varieties.
Tomato bushy stunt symptoms
Plants infected with the tomato bushy stunt virus have smaller than normal leaves which are cupped and curled downward. New leaves are crinkled and twisted, with dead tips. Infected plants produce more lateral shoots, creating the bushier, though often stunted appearance. Lower leaves may have a purplish tinge and tend to be chlorotic. Tomato bushy stunt causes a significant reduction in fruit production. The fruit that is produced, well, let's just say it doesn't look very appetizing.
Preventing tomato bushy stunt
Since damaged roots create a point of entry for this and other diseases, avoid digging once plants are established. Instead, feed plants by top dressing and banding, and disinfect tools regularly.
Once the virus is present in the soil, it is suggested that long crop rotations, of 4 or more years, are suggested. Infected plants should be removed and tossed in the trash.
Tomato yellow leaf curl is a devastating viral disease of tomatoes that made its way to California in 2007. Mostly limited to greenhouse environments, this disease can wipe out all of your tomato plants, so you need to know what it looks like.
This disease is spread by whiteflies and leafhoppers, and it is not limited to tomatoes. Other members of the nightshade family, such as peppers, can also be infected, as well as beans and many as yet to be identified weeds. Most often, the disease is spread through contaminated plants.
Symptoms of tomato yellow leaf curl
Infected tomato plants tend to grow unusually upright, while being stunted. This occurs because the virus shortens the internodes. Internodes are the spaces between the nodes where leaves emerge. Shortening the internodes makes the plant look bushier, but not healthier. Tomato leaf curl virus also causes up to 100% flower drop, which means no harvest. The most obvious symptom of tomato yellow leaf curl is the leaves. Infected leaves are smaller than normal, crinkled, and curled upwards. They also tend to turn yellow at the edges and between the veins. Unfortunately, many other viruses have similar symptoms. If you believe you have a plant infected with tomato yellow leaf curl, contact your local County Extension Office right away.
Whiteflies and disease transmission
Specific varieties of whiteflies (Bemisia) are responsible for transmitting this disease. If you look closely, you can see that some whiteflies hold their wings tent-wise, over their bodies, while others hold their wings flat. In the same way, some nymphs will have smooth edges, while others have a fringe of filaments. To see this level of detail, it is relatively easy to take a piece of clear packing tape and wrap it around your hand the same way you might to remove lint or pet hair from a pair of paints and capture the whiteflies on the tape. Then you can use a magnifying glass or hand lens for a closer look. It is the whiteflies that hold themselves under a tent and whose nymphs have smooth edges that carry the tomato yellow leaf curl virus. Leafhoppers are also believed to carry and transmit the disease.
Preventing the spread of tomato yellow leaf curl
Tomato yellow leaf curl has the potential to temporarily eliminate tomato growing in certain areas, including your garden. This disease is the reason why tomatoes are generally not grown in tropical and semi-tropical regions. Cold winters tend to kill of the whitefly vectors, but the San Francisco Bay’s winters are not necessarily cold enough to provide that protection. Instead, you can use these tips to protect your tomato plants, and tomatoes, in general:
Now you know.
Fresh-from-the-garden, sweet, sun-warmed, juicy tomatoes are probably the number one reason why people start gardening. Be forewarned! No store-bought cousin will ever measure up once you have experienced the real deal!
Native to South and Central America, tomatoes have been cultivated for over 3,000 years. Prior to Halloween of 1548, Italy had no tomato sauce. It’s hard to imagine, isn’t it? Now, as winter fades, many gardeners feel compelled to plant tomatoes. While starting too soon is a waste of time and seeds, tomatoes can be started indoors 6 to 8 weeks before the last frost date.
Commonly grown as annuals, tomatoes (Solanum lycopersicum) are actually perennial plants, in their native regions. These members of the nightshade family, along with eggplants and potatoes, are self-pollinating. This means that honey bees and other pollinators can carry pollen from one flower to another, on the same plant, to cause a plant to create fruit. Of course, the more plants you have, the higher your pollination rates will be. Plus, you can never have too many tomatoes, right?
Shopping for tomato plants
Spring garden shows and plant sales draw gardeners like moths to flame. This is especially true about tomatoes. With so many varieties, colors, and sizes to choose from, we tend to get carried away. To be fair, who doesn’t want to try growing that new black, striped, pear-shaped variety with a nice citrusy aftertaste? So, we fill boxes, bags, and the backseat with countless new and old favorite tomato plants and head home. Very often, those store-bought tomato plants are root bound. If you buy tomato seedlings, be sure to handle the plants gently as you transition them from greenhouse city life to life in your yard. Also, as dreams of heirlooms and hybrids dance through your head, remember that tomatoes, like all other plants, can be vectors for pests or disease. When you bring new plants home, be sure to place them in a quarantine area until you are sure they are healthy.
What is your tomato type?
Tomato plants are classified as either determinate or indeterminate. Determinate plants, also called ‘bush’ tomatoes, look like 3 to 5-foot shrubs and all the tomatoes ripen within a 4 to 6 week period. This is perfect if you plan on canning your bounty. It doesn’t really work if you are growing tomatoes for fresh eating. Indeterminate tomatoes put out a continuous crop all summer and fall, providing a similar sized crop, but spread out over time. You can also check the UC Davis chart on tomato varieties, if you are growing in California.
How to grow tomatoes
Tomatoes are easily grown from seed or cuttings. They grow best in the ground, but can also be grown in containers or straw bales. Seeds should be planted 1/4” deep. Keep the soil moist, but not soggy. As seedlings emerge, they can be hardened off and moved outdoors, as long as they are protected from chilly nights and strong winds. Germination of most tomato seeds usually takes 5 to 10 days in warm weather. Colder temperatures slow the process. Give your tomato seedlings a boost with fish emulsion. Keep weeds away from your seedlings, so that they can get a healthy start. As your tomato plants get bigger, you may want to provide some support with tomato cages or stakes.
Pinching your tomato plants
No, I don’t want you to be mean to them - well, maybe a little. Pinching back excess growth can make more nutrients available to whatever is left, plus it stimulates flower and fruit production. On the other hand, if you take away too many leaves, your tomatoes can get sunburned. Yellow or green shoulders on otherwise red fruit is also a sign of too much sun exposure. Pruning tomatoes is a balancing act between sun protection, fruit production, and disease prevention. Deficit irrigation can also be used to significantly improve the flavor and increase the sweetness of your homegrown tomatoes.
Prune your tomato plants so that they have two or more stems starting near the base of the plant. If you pinch your plants to make a central stem, they will produce fruit earlier, but at lower quantities.
Tomato pests & diseases
Hornworms and blossom end rot are the two most common problems faced by California tomato growers. Blossom end rot is caused by an erratic calcium supply, which occurs whenever watering is irregular. A regular watering schedule can reduce blossom end rot in tomatoes, as well as leaf roll, cracked fruit and catfacing, and citrus fruit split. Tomato hornworms are large and can devour an amazing amount of foliage before you even know it. Achemon sphinx moths look a lot like tomato hornworms, but they are mostly limited to grape vines.
Other common tomato pests include tomato fruitworms, tomato pinworms, Eriophyid mites, bagrada bugs, blister mites, green fruit beetles, Japanese beetles, nematodes, leaf-footed bugs, leaf miners, oriental fruit flies, stinkbugs, spider mites, whiteflies, treehoppers, weevils, cutworms, and voles. And squirrels. Always squirrels.
Tomato diseases include tomato ringspot, tomato spotted wilt, alternaria stem canker, fusarium wilt, tobacco mosaic virus (TMV), grey leaf spot, anthracnose, verticillium wilt, stem blight, and powdery mildew. Many of these diseases can be prevented with regular crop rotation.
Tomatoes grown from seed will develop a taproot. What is really strange is that tomatoes grown from cuttings will not.
If we ever meet in person, be sure to ask me about Wally's s****y tomatoes!
We’ve all heard some seeds or plants described as heirlooms and others hybrids, but what do those terms really mean?
Both hybrids and heirlooms come about through naturally occurring cross-pollination, as opposed to genetically modified organisms (GMOs), which are created in a lab using altered DNA strands.
Before agriculture became an industry, people grow a wider variety of plants for food. That biodiversity helped offset inclement weather, diseases and pests, and other threats to a failed crop and the resulting starvation. Corporate agriculture, on the other hand, feeds countless millions by generating a smaller variety of uniform plants that consistently grow at specific rates, that can be sprayed with a variety of pesticides, herbicides, and fungicides, ship well, and store well. As many of you know, taste and texture often suffer s a result.
Pros & cons of heirlooms
Heirloom seeds are those that have been handed down, person to person, in a specific geographical region, for a very long time. Also, heirlooms are open-pollinated, which means pollination occurs naturally, by wind, birds, animals, and insects, and not by human efforts. Heirloom varieties are at least 50 years old (some say 100 years), and many of them have been grown consistently, in the same locale, since before WWII. These plants have evolved to take advantage of local microclimates and beneficial insects. Heirloom seeds are hand selected by gardeners from the very best plants each growing season. Many heirloom plants do not have the uniformity or long term storage capabilities of hybrids, but growers (myself included) claim that the flavor is significantly better. Heirloom crops have more variety in size and shape than hybrids, but they always grow true to their parent plants. Heirlooms are more genetically diverse, making them more durable as a species, and less susceptible to local pests and diseases. Heirloom offspring are fertile and can reproduce.
Pros & cons of hybrids
Hybrid plants are intentionally created by cross-pollinating different varieties of a species. The intention of hybridization is to take advantage of the best characteristics of each parent plant, creating what is known as hybrid vigor (heterosis). This vigor only lasts for one generation. Hybrid seeds do not grow true to their parents and they lack vigor and genetic diversity. This lack of diversity is what caused the Irish Potato Famine of the 1840s. If all the plants are identical, they are equally susceptible to pests and diseases. A single threat can be devastating.
Creating a hybrid that grows “true” to the desired characteristics takes years of diligent effort. Plants are often pollinated by hand or grown in greenhouses or pollination bags that block contamination from outside pollen to ensure that pollination only occurs between the desired plants. The majority of the fruits and vegetables you see in grocery stores are hybrids. Harvests are very consistent in size and shape. Hybridization is done for many specific characteristics:
When shopping for plants and seeds, one way to know if it is a hybrid is to look at the Latin name. If you see the letter “x” between words in the name, it is a hybrid. For example:
Raspberry (Rubus idaeus) crossed with blackberry (Rubus ursinus)
creates Loganberry (Rubus x loganobaccus)
*Check labels for the letters V, F, N, T or A. These symbols indicate a resistance to verticillium wilt, fusarium wilt, nematodes, tobacco mosaic virus or alternaria stem canker, respectively.
Understanding the difference between heirlooms and hybrids can help you make the right choice if you want to collect viable seeds from your harvest for next year’s planting.
Parsley - it’s not just for restaurants any more.
As a kid, I always turned a suspicious eye toward that sprig of greenery on my plate. My mother urged me to try it, so I did. Unfortunately, my young taste buds were not impressed. The mildly bitter bite of parsley was not my idea of delicious until many years later. Now that my taste buds are older and wiser, the refreshing tang of parsley adds a bright balance between flavors, cleanses the palette, and spices things up. If that weren’t reason enough to add parsley to a landscape, parsley packs one heck of a nutritional punch and, hey, it looks nice in the garden!
Parsley is a central Mediterranean plant, which means that it grows well in California, as long as it is protected from our scorching hot summers. Parsley makes an excellent shade garden or container plant. You can even grow it on your kitchen window sill for easy access and nice color if you have strong enough sunlight.
Parsley is related to celeriac and celery, which explains its Latin name (Petroselinum crispum), which means ‘rock celery’, but it’s a heck of a lot easier to grow than celery. Parsley prefers well-drained soil that is kept moist, but my plants seem to grow under just about any conditions. In spite of my heavy clay soil, I have several parsley plants that thrive under roses, trees, and shrubs. Research has shown that parsley also repels asparagus beetles, making it a good companion to asparagus and tomato plants.
Growing parsley does require some patience if you are starting from seed. Seeds should be planted 1/2 inch deep, 6 inches apart, and they can take 4 to 6 weeks to germinate. Germination rates are pretty high, so growing parsley from seed is the most cost effective method. While you’re at it, plant some extras and give young plants to family and friends as gifts!
In tropical areas, flat-leafed and curly parsley are grown as annual herbs. In more temperate regions like ours, parsley is biennial. Biennial plants take two years to go from seed to seed, but some of my parsley plants keep on growing for another year or so. In addition to leaf parsley, there is a variety called Hamburg root parsley (P. crispum radicosum). Root parsley is grown for the taproot, which looks, cooks, and eats like a white carrot. (I may have to try that!)
Parsley plants allowed to go to seed provide habitat, pollen, and nectar to honey bees and many other beneficial insets, some swallowtail butterflies, and even goldfinches.You will probably also end up with many free, randomly placed parsley plants next year!
If flavor and looks weren’t reason enough to grow your own parsley, the CDC says it’s a nutritional gold mine. They ranked parsley at #8 as a food that reduces chronic diseases, such as cancer, coronary disease, and osteoporosis. To learn more, check out the U.S. Dept. of Agriculture’s nutritional analysis website that allows you to look up the nutritional value of pretty much any food. Just 10 sprigs of parsley provides 22% of the RDA for Vitamin C and 200% of Vitamin K.
It’s pretty. It’s durable. It’s good for you. And it tastes good.
Where’s your parsley planted?
Blistered leaves and warty twigs are signs of eriophyid mites.
Eriophyid mites are a family of microscopic plant parasites that include blister mites, gall mites, bud mites, and rust mites. While you will probably never see them without a 20x hand lens, at 1/100” in length, they can be a translucent yellow, pink, white, or purple, with two pairs of legs up near the head.
Symptoms of eriophyid mite feeding include:
Blister mites commonly attack beech, boxelder, cottonwood, elm, maple, live oak, walnut, willow, poplar, roses, privet, and alder. Unfortunately, they also feed on tomatoes, peach, apples, pear, and grapes. I have also heard of them on plum trees in San Jose, California. Eriophyid mites spread on the wind, so there isn’t much you can do to stop them from showing up in your landscape. Luckily, the damage they cause is mostly aesthetic and poses no real threat to otherwise healthy plants. That being said, who wants warty leaves or scabby twigs? Also, eriophyid mites may also carry viruses that can cause real damage.
Insecticidal soaps and horticultural oils can be used on heavy infestations, but simply removing affected leaves, buds, flowers and twigs is really all that’s needed. Sulphur and neem oil have also been shown to be effective. Before you work too hard at getting rid of these minor pests, you may want to keep in mind that the eriophyid mite serves as a replacement food for predatory spider mites and other beneficials, when their foods of choice are absent.
Isn’t it nice to know that some problems in the garden are not big enough to worry about?
If you have citrus trees, you have leaf miners.
Leaf miners can be found feeding on many edible and ornamental plants, including tomatoes, beans, cole crops, cucurbits, aster, peas, impatiens, petunia and dahlia. While leaf miners are generally not a threat to plant health, they can detract from a plant’s appearance and it is still a good idea to monitor infestations.
Leaf miners are not a specific insect. Instead, they are the larval stage of several moths, sawflies and some beetles. The damage is distinct burrows within leaves, leaving what looks like serpentine, white trails. By feeding within the leaf, leaf miners are protected from predators and pesticides. In fact, applying pesticides actually helps leaf miners by killing off their predators. To make matters worse, all leaf miner species are resistant to carbamates, pyrethroids and organophosphate pesticides.
If you peel back the top layer of an infested leaf, you can actually see the pest, though you may need a magnifying glass.
Spring is the time of year when it is common to see white powdery patches appear on leaves. This bane of gardeners is called powdery mildew, and it can occur in autumn, as well.
Cucumber, melon and other cucurbits are susceptible to powdery mildew. You may also see it on tomatoes, roses, snapdragons, chrysanthemums, peas, artichoke, beets, grapes and wheat.
What starts as a small white spot, powdery mildew expands to engulf an entire leaf as the nutrient-sucking fungi bleed the life from your garden. It can be found on either side of a leaf and sometimes on stems.
Powdery mildew identification
Powdery mildew is a fungal disease. It is caused by different types of fungi (e.g., Erysiphe spp., Sphaerotheca spp.), depending on which plant is affected. Contrary to common belief, moisture and humidity are not needed for these fungal beasties to appear.
The white powder seen on leaves is actually thin layers of fungal tissue (mycelium). Other symptoms of powdery mildew include:
How does powdery mildew grow?
Powdery mildew fungi simply need living plant tissue to survive and thrive. To make matters worse, their spores are carried on the wind, so the battle never ends. The reason powdery mildew seems to disappear in the heat of summer is that these microorganisms prefer shade and temperatures between 60° to 80°F. Our California summers are simply too hot for the spores to reproduce. Instead, they remain dormant until conditions improve.
Not only does powdery mildew cause leaf loss, it can also weaken a plant. This lowers production and increases susceptibility to other pests and diseases, such as citrus blast. Leaf drop can also lead to sunburn damage.
Powdery mildew management
Prevention and vigilance are the best ways to counteract powdery mildew. These tips can help, but nothing will eliminate powdery mildew in the garden:
Some people recommend spraying plants with a baking soda solution, but this can add too much salt to your soil.
More recent research shows that spraying the soil with milk before planting and then spraying the leaves of susceptible plants when the disease is most likely to start appearing can significantly reduce the incidence of powdery mildew in your garden.
Has half a cabbage turned brown? Or have the pea plants in your garden turned white?
If you look at the photo below, you will see that new (uninfected) growth is bright green, as it should be. Everything else on the plant looks bleached. That bleaching is caused by a fungal disease known as Fusarium wilt.
Similar to Verticillium wilt, Fusarium wilt is a common vascular disease in which a fungus (Fusarium oxysporum) clogs vascular vessels. It’s pretty much the coronary artery disease of the plant world. In addition to bleaching, common symptoms of Fusarium wilt include chlorosis, stunting, damping-off, brown veins, necrosis, and premature leaf drop.
This soil pathogen is found worldwide and it is spread by water splash, tools, and infected seeds and transplants. Fusarium wilt enters a healthy plant when germinating spores (mycelia) stab at the plant’s root tips and any damaged root tissue. That’s where the really amazing stuff starts to happen!
The Fusarium oxysporum fungus has no known sexual stage. Instead, it produces three different asexual spores: microconidia, macroconidia, and chlamydospores. Basically, the germinating spores (mycelia) inject themselves into a plant’s root system. From there, the mycelia move through the cells of the root cortex and into the xylem (a plant vein). Then, it starts producing the microconidia (asexual spores). The microconidia join the sap stream for a free ride to the rest of the plant. Eventually, there are so many microconidia that a vein is blocked. That’s when they germinate.
The vein blockage stops the plant form absorbing and moving nutrients, so the stomas close, the leaves wilt, everything looks bleached and it dies. As the plant dies, the fungus spreads throughout the plant and sporulates. [Cool word, right? It means “to produce spores”]
Plants affected by Fusarium wilt
Fusarium wilt attacks a variety of garden plants and the pathogens are specialized according to the victim. Fusarium wilt can attack peas, beans, and other legumes, tomatoes, tobacco, sweet potatoes, cucumber and other cucurbits, and even banana plants! When Fusarium attacks cabbages and other cruciferous vegetables, yellowing and browning leaves is the most common symptom. This particular form of is called Fusarium yellows.
Fusarium wilt controls
Once a plant is infected with Fusarium wilt, there is nothing to be done except remove the plant and toss it in the trash. Planting resistant varieties in the garden can help prevent Fusarium wilt, but crop rotation is not an effective control method. This is because the chlamydospores can hang out in the soil indefinitely. Some fungicides can be marginally effective.
Since Fusarium oxysporum prefers heavy, moist soil, aeration and adding compost to the garden can bring more oxygen into the soil. This reduces the welcome mat effect for many types of fungus. Ensuring proper drainage is the best way to avoid this garden menace.
Stink bugs can destroy your garden in short order and they smell pretty bad.
Stink bug identification
Stink bugs are true bugs, which means they are members of Hemiptera. The word Hemiptera comes from the Greek for half-wing. The front half of their wings are hard and the back half is soft. Stink bugs can be recognized easily because of their flattened, boxy, shield-shaped body and tiny scent gland openings near where their shoulder blades would be if they were human. There are several species of stink bugs in California. Here are just a few:
Stink bug damage
There are 250 varieties of stink bugs in the U.S. and 4700 worldwide. They can be brown or green. Stink bugs eat seeds, grain, fruit, vegetables, ornamental plants, legumes, weeds and tree leaves. They can also transmit tomato bacterial spot with their piercing mouthparts. Unfortunately, insecticides are ineffective against stink bugs.
Stink bug controls
Wasps and flies, such as the tachinid fly (Trichopoda pennipes) and the Trissolcus basalis wasp will parasitize the eggs, but those critters are not always available when you need them. You can also provide habitat for birds, spiders, toads, and other insect-eating critters. The best method of control for stink bugs is to handpick and deposit them in a container of soapy water.
The Oriental fruit fly is an invasive pest that was found in the Bay Area during the summer of 2015.
The damage done by this pest can be extensive, so any time it makes an appearance, the state and federal government immediately declare war, putting a series of countermeasures in place to eradicate this pest. Most estimates make the Oriental fruit fly as destructive as the Mediterranean fruit fly.
Oriental fruit fly identification
The Oriental fruit fly (Bactrocera dorsalis) is slightly larger than your average housefly. It tends to be bright yellow with a dark “T” on its abdomen, though other colorations have been seen. The wings are clear, with a dark outer edge. Maggots are slightly less than one-half inch long and yellowish-white.
The Oriental fruit fly is a common pest in many parts of the world and it enters the U.S. through produce smuggled into the country.
If you suspect that you have seen an Oriental fruit fly in your garden, please contact the USDA hotline at (202) 720-2791. Visit the Dept. of Agriculture’s quarantine map to see what quarantines, if any, may include your garden!
I was surprised to see my containerized tomatoes starting to look like apple dolls. You know, those wrinkled up faces made out of withered apples ~ certainly not very appetizing!
When a plant is severely root bound, it may be necessary to cut the ring formation to encourage outward growth. To do this, use a sharp knife and cut vertical lines up the side of the root ball in several places. You only need to go in an inch or so. Using your fingers, pull the bottom roots outward as you place the plant in new soil.
Be sure to water well and your plants will grow new roots to support delicious above-ground growth!
You may have recently spotted (or heard) a large metallic green bug buzzing around your yard. Green fruit beetles, or figeater beetles, are large, clumsy, metallic green pests.
My dogs and chickens love to chase green fruit beetles, and I am grateful. In the heat of summer, these pests fly in to lay eggs throughout my garden and landscape, taking a toll on my fig harvest. They also feed on apricots, nectarines, plums, grapes, pears, and tomatoes, as well as manure and compost. Generally, figeater beetles (Cotinis mutabilis), do not cause a lot of damage, but they can if enough of them converge on your garden.
Green fruit beetle identification
Green fruit beetles (Cotinis mutabilis) are members of the scarab family and easy to identify. They can reach 1-1/4 inch in length and have a shiny green exoskeleton. They also tend to bump into things as they fly. They are often mistaken for green June beetles (Cotinis nitida) and Japanese beetles (Popillia japonica), both of which are mostly found on the East Coast. Green fruit beetle larva, which are called ‘curly backs’ are large, up to 2 inches long, and a dirty white color, with a dark head. They get their name because they move by rolling over onto their back and using the stiff hairs to propel them forward. The larvae feed on mulch, manure, and compost. It is not uncommon to find figeater beetles and figeater beetle body parts nose down in garden soil. This is how they lay their eggs.
Green fruit beetle controls
Since these pests are attracted to the smell of ripe fruit, harvest frequently. Also, you can plant crops that ripen earlier in the season to avoid feeding green fruit beetles. Personally, I have trained my dogs to catch them and I use a butterfly net to pin them down, then I feed them to my chickens, but you may not have that option. Luckily, it is very easy to build a green fruit beetle trap. Simply mix 1 part water with 1 part grape or peach juice and put it in a one-gallon container. Then, create a funnel out of screen or hardware cloth and insert it into the container. The adult beetles will be attracted to the juice, climb down into the container, and then be unable to figure out how to escape. (I wonder how chickens feel about beetles drowned in juice…)
Have you noticed fine webbing on your tomato plants recently? Are your leaves looking stippled (spotted white or yellow)? If so, you are like the many other gardeners experiencing spider mites in their garden.
Spider mites are very tiny. The females are only 1/20” and the males are even smaller! However, as spider mites colonize on a plant, you will see webbing, especially on the underside of the leaves. Spider mites can suck the life juices right out of your favorite heirloom tomato and these little buggers can complete an entire generation in less than a week! Unfortunately, drought-stressed plants are more susceptible to spider mite infestations.
One of the most common causes of spider mite infestations is the use of broad spectrum insecticides, which kill off beneficial predators along with the pests. The easiest (and least destructive) way to get rid of spider mites is to move the infested plant to a clear area of the yard and spray it off with the hose. Insecticidal soaps or horticultural oils can also be used, but watch out for applying them on sunny days. I recently learned the hard way that leaves will burn if insecticidal soap is left on the leaves during the heat of the day.
If spraying your plants does not provide adequate control, you can purchase western predatory mites and Phytoseiulus (spider mite predators). Spider mites love dusty conditions, so you can make your yard less hospitable by giving plants an occasional light rinse.
Blossom end rot is the bane of tomato growers. It starts as small brown spots on the bottom of the fruit and expands to a large, sunken brown or black leathery area.
Contrary to popular belief, calcium deficiency in the soil is rarely what causes blossom end rot.
Most soils contain plenty of calcium. There are exceptions and the only way to know for sure is with an affordable, lab-based soil test. I urge everyone to get their soil tested every few years. The information is invaluable. But back to blossom end rot.
Blossom end rot occurs when calcium and irrigation are out of balance. Calcium is an “immobile” nutrient, which means it is very difficult (i.e., uses a lot of water) to move around inside the plant after it has been absorbed. Regular, frequent irrigation during the growing season provides plants with the water they need to get calcium where they need it.
Blossom end rot conditions are made worse when salt levels are too high due to over-fertilizing. Lime can be added to provide calcium. When watering, be sure that the roots are neither dried out or saturated.
Blossom end rot can also affect summer squashes, such as zucchini. A similar problem, called bitter pit, affects apples. In either case, the rotten part can be cut out and the rest of the fruit is fine for eating.
Now you know.
Yesterday, I curb-scored 8 very nice tomato cages. While they come in a variety of sizes and shapes, the most common type are concentric circles held at different heights, usually with three legs.
You can grow a surprising amount of food in your own yard. Ask me how!
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