How will the commercial arborist manage my gypsy moth problem?
Arborists need to time their applications well and thoroughly cover trees. If large areas need to be treated and trees are tall, then aerial applications may be recommended. Under a wide variety of conditions (rainfall, population size, and age structure), well timed applications of B.t. (Bacillus thuringiensis, a microbial insecticide) have been shown to provide good levels of control and foliage protection. Bt poses fewer problems in watershed areas where Dimilin (an insect growth regulator) is a concern. Other effective materials that may be used are Conserve® or Confirm®. Top of Page Can I do the spraying myself? What do I use? We do not recommend that you try to treat trees yourself. Unless your tree is very small, you will not be able to get adequate coverage of the leaves. Bt is labeled for gypsy moth but the homeowner product does not last for more than a few days. Call our horticulture consultants or “send a question” for advice on specific insecticides. Commercial applicators
