Lonnie from Fairview Ok writes,
Will Malathion 57% work on Japanese beetle on elm trees?
Malathion 57% is labeled for Japanese Beetles and should do a great job for you when used as directed on the product label. Malathion 57% is typically meant for treating large areas or crop land. We would recommend Talstar P. It is a insecticide that is labeled for lawn and ornamentals and is safe for plants, bushes, shrubs and trees. Talstar will provide a 30 day residual on the plants that you spray and should provide relief against the Japanese beetles whereas the Malathion will only kill the ones that it makes contact with during application.
Answer last updated on: 03/23/2015