Nick from Saginaw writes
Could be a caterpillar?
Sevin Concentrate does treat a wide variety of insects on ornamental plants such as oak. You would use 1.5 oz of concentrate per gallon of water on ornamentals. We do recommend inspecting the plants, especially the undersides of the leaves, to help you identify what, exactly is causing the problem. We can make an accurate recommendation for you once you have identified a specific pest.
Answer last updated on: 06/15/2017