Asked July 21, 2021, 6:26 PM EDT
Lincoln County South Dakota
I'm going to lean on my colleagues Dr. John Ball (firstname.lastname@example.org) and Dr. Amanda Bachmann to assist with this question.
OK let me know please and thank you!
The good thing about holes in leaves is that the plants will have new leaves next year. The amount of defoliation doesn't look too bad and based on your county it could be anything from previous grasshopper or Japanese beetle damage. Have you caught any potential insect culprits?
I have not noticed any insects that are actively eating the leaves. If it is nothing to worry about let me know or if you think I should apply some type of pesticide let me know! Thanks!
I'd just keep scouting and focus on making sure they have enough water. I would not apply any insecticide without first identifying an actual culprit.