Today I noticed that my Concord grapevine was infested with caterpillars.
What caught my attention were leaves that were obviously munched on. After quick investigation I found many dozens of small leaves that were curled up and 'stuck' together (Picture 1) with a web-like material. When I opened up the nest of leaves I found a single, 1 cm long, fuzzy green caterpillar and lots of black specs which could be feces or eggs but I'm not sure. The second picture below shows a caterpillar at the end of my thumb. The form of their nests reminds me of a tent caterpillar but I'm not sure what these ones are.
I immediately hit them hard with an insect-repellent soap solution. This took a while since I opened up each nest and drowned the buggers. I hope a couple of applications will do the trick as this will be quite labour intensive.
Please post a comment if you know what these things are and if I should do more than spray with a soap solution in order to prevent further damage.
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