2018 Crop Protection Guide for Tree Fruits in Washington

Special Programs

Wednesday, January 23, 2019

Pesticides for Nonbearing Trees

While any of  the pesticides listed for insect and disease control on bearing trees may be used on nonbearing trees, some products are restricted to nonbearing trees only.

The insect and mite species which attack nonbearing trees are generally the same as those which attack bearing trees; however, fruit damage is not a concern.  A few species are particularly troublesome on young, rapidly growing trees.  These include white apple leafhopper, green apple aphid, apple rust mite, and cutworms. San Jose scale can also establish itself on trees at this time when spray programs are generally minimal.

Cherry fruit fly may infest the first few fruit that are unsprayed and unharvested in a young cherry orchard. This increases the cherry fruit fly population in the area, making control more difficult in neighboring orchards and during the first harvest season in the young block.

Tree Fruit Research & Extension Center, 1100 N Western Ave, Washington State University, Wenatchee WA 98801, 509-663-8181, Contact Us