Oak from Shamokin, Pa writes
I read elsewhere that a Merit drench in the spring helps control gypsy moths but the label of the product does not indicate that it is to be used for that pest.
Merit 75 WP is not labeled to treat Gypsy Moths. Using an insect spray such as Monterey Insect Spray containing Spinosad is the most effective way to treat for these types of caterpillars. When sprayed on the foliage, this products works by poisoning the caterpillars feeding on the leaves. It is more effective and generally lasts 3-4 weeks. Garden Insect Spray with Spinosad is a concentrate that can be applied with trigger, hand-held, or hose-end sprayers. This product is not a synthetic chemical, but a bacterial product produced by fermentation. It is fast acting and odorless.
Answer last updated on: 08/03/2015
