worms - Ask Extension
Hi, I have just recently found a black worm crawling on my apple tree leaves. it appears to be very think and about 1/8" long. leaves are beginnin...
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worms #867544
Asked May 08, 2024, 11:03 AM EDT
Hi, I have just recently found a black worm crawling on my apple tree leaves. it appears to be very think and about 1/8" long. leaves are beginning to develop pin size holes. this has appeared on some trees that I just planted last weekend and as well some older trees. I have already sprayed my dormant oil and my fruit tree spray for the year. what should i do?
thank you
Neal winger
Allegan County Michigan
Expert Response
At this time of year, none of the common apple pests would match the description of a black caterpillar. I would guess this is is some type of caterpillar or sawfly that is using apple as a secondary host. It may look unsightly but should not impact the health of the tree. If you are concerned about damage, you can apply a pyrethroid that is labeled for control on fruit trees.
