tiny worms eating hollyhock leaves

Question

I live in Iowa and have tiny worms eating my hollyhock leaves. What do you recommend to spray them with to kill them? Thank you.

Answer 1

You could try using Bt or neem oil to get rid of the worms. Here is more information:
https://extension.colostate.edu/pubs/insect/05556.html
https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm