Patricia from Hamilton writes
I have an infestation of European Hornets on my lilac bush and they are girding the branches and killing the bush. If I spray liquid Sevin at their chew sites, will it kill them? Is Sevin systemic, i.e. will they take it back to their nest and kill other hornets?
Sevin Concentrate is not labeled for hornets or other stinging insects so would not be recommended. It is not systemic and would not be carried back to any nest, either. A better option would be to use a product like Bifen IT on the bushes to help control those that contact a treated area. We also have a great guide on treating waps and hornets here.
Answer last updated on: 09/04/2017
