Now is the time to have one of our Arborists assess your trees for potential risks. Avoid a possible nasty insurance claim and most importantly, preserve your trees vitality.
Those unsightly holes in your tree leaves that you’ve noticed and wondered about throughout the growing season most likely are the result of Bruce Spanworm. Beginning in early April to late May, the caterpillars feed on the flowers, leaves and buds. Young worms are carried by the wind and can drift considerable distances on silken threads. There are two methods for controlling this insect. One option is spraying in early Spring with a biological control. The second option is applying (2) sticky bands at roughly 30 and 60 cm above ground around the tree trunk in September to late October in order to trap the female moths as they crawl upward to deposit eggs on the trunk and larger tree branches.
Minimize usage of those nasty pesticides and take advantage of Dormant Spraying. Dormant spraying refers to spraying during the season of the year when deciduous trees and shrubs are leafless, and buds are in the overwintering, dormant condition. Materials applied as dormant sprays include horticulturals oils (dormant oil) and lime sulphur. Horticultural oils mix with water to form a milky emulsion. After the water evaporates, a thin layer of oil is left on the tree. Any overwintering stages of insects such as eggs or pupae, when sprayed with dormant oil, will suffocate. Some examples of these insects are scales, mites, aphids and eggs of moths, such as leafrollers. When lime sulphur is included in the dormant spray, some overwintering stages of plant disease will be reduced as well.