If you grow grapes, you will want to learn to recognize the achemon sphinx moth.
While the achemon sphinx moth larvae do not generally cause a lot of damage, their populations are cyclical and boom years can lead to severe defoliation. During heavy population years, a single vine may be home to 500 worms. A large worm can eat as many as 9 leaves in 24 hours, so it doesn’t take long for a vine to be devastated.
Achemon sphinx moths, like other sphinx species, are large, fast flying moths with narrow wings. They are sometimes mistaken for night-flying hummingbirds, as sphinx moths are able to hover.
The achemon sphinx moth (Eumorpha achemon) larvae look very similar to the tomato hornworm, only they can sometimes be orange or brown. They average 3 inches in length when full grown.
When working your grade vines, simply keep a look out for these heavy feeders. If you notice an exceptionally heavy infestation, you may want to notify your local Cooperative Extension Office.
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