https://youtu.be/KjTCIWShYV0
The gypsy moth originated in Europe, and was introduced into lower mainland in about 1978. The gypsy moth can cause serious damage to many species of trees and shrubs by feeding on their leaves, flowers, or branches. This can cause trees and shrubs to grow less or cause them to die. Here in B.C., the gypsy moth is a serious threat to major fruit producers. It eats the leaves of fruit trees such as cherry, apple trees and blueberries. Many methods are used to monitor and control the gypsy moth, include mass trapping or ground and aerial spraying of the commercial product Foray 48B®. Foray 48B® is a water-based product containing a bacterium called Bacillus thuringiensis variety kurstaki (Btk). Btk is a bacterium found in soil. Foray 48B® is not harmful to people, dogs, cats, fish, birds, reptiles, or insects such as honeybees, beetles or spiders. Between April and June there are 3 separate applications that are done every 7 to 10 days. These applications are usually required to treat the gypsy moth larvae which hatch throughout the treatment period.
https://www.linkedin.com/pulse/gypsy-moth-time-randy-bilesky?published=t
http://www.delta-optimist.com/opinion/blogs/blog-gypsy-moth-time-1.2233739