Yakima County WA Homepage
Search

Pests & Diseases

Backyard Fruit Trees

Backyard fruit trees can be beautiful and productive, however these trees require a great deal of care and effort each and every year.

Many people are easily swayed by the thought of planting a fruit tree and the harvest of apples, pears, or cherries. Most often though, the pests of these fruit infest the trees and the owner is left with fruit that no one wants to eat!

The amount of effort and care needed is beyond just a casual glance, it takes real time and care to produce quality fruit. These backyard trees pose a great hazard to commercial growers.

The primary focus of the Horticultural Pest and Disease Board is to serve commercial producers of Yakima County by protecting orchards from invasive pests and diseases of tree fruit that often breed on home sites or no longer farmed lands.

Pests & Diseases

Pests of tree fruit such as codling moth, pear psylla, cherry fruit fly, and apple maggot as well as diseases such as fire blight, apple scab, and others are found in neglected orchards and backyard trees. These pests and diseases reproduce in these unmanaged trees and spread to commercial orchards and cause economic losses.

If you are experiencing unusual pest or disease pressure, and are unsure how to proceed, please alert us! Is the pest or disease apparent on a nearby property? Do you have a friendly relationship with the owner? Often a friendly reminder is all it takes!

OPM_applemaggot01_Chelan County_treefruit.wsu.edu

Adult apple maggot (H. Reidl, OSU)

Apple maggot flies are a serious pest that damage apples by laying eggs inside the fruit. The small white maggots then tunnel through the apple’s flesh, often just under the skin, making the fruit soft and unusable.

This pest is common in Western Washington but is spreading into Central and Eastern parts of the state, especially on backyard apple trees. Because apple maggots can easily move into commercial orchards, quarantine zones have been set up to help stop their spread. They also attack wild apples, crabapples, and hawthorn.

Learn how to identify and manage apple maggots at: http://treefruit.wsu.edu/crop-protection/opm/am-control_waapple-growers/

Fig-4-psylla-summerform-2_T.DuPont-16.9-s-scaled_ treefruit.wsu.edu

Pear psylla summerform adult (T. DuPont)

Pear psylla is a significant pest in Washington, producing honeydew that causes fruit russet and can stunt and defoliate trees. In the Pacific Northwest, it is a pest only for pears, but can feed on other deciduous fruit trees like apples, conifers, and shrubs.

Find more information on Pear Pyslla at: https://treefruit.wsu.edu/crop-protection/opm/pear-psylla/

OPM_CM01_Codling Moth_treefruit.wsu.edu

Codling moth adult (J. Brunner)

Codling Moth

This is one of the largest families of moths, with about 950 North American species. Codling moth larvae bore deep into the fruit, making it unmarketable. If uncontrolled, codling moth can destroy most of the crop. Codling moth prefers apple but also attacks pear, large-fruited hawthorn and quince.

Find more information on Codling Moth at: https://treefruit.wsu.edu/crop-protection/opm/codling-moth/

OPM_WCFF21_Western Cherry Fruit Fly _treefruit.wsu.edu

Cherry fruit fly adult (E. Beers, June 2007)

Western Cherry Fruit Fly

The western cherry fruit fly is a significant pest in cherry growing regions in the western United States, native to North America. It attacks commercial cherry in the Pacific Northwest since the early 1900s. The fly's larva develops in ripening cherries, causing significant damage to trees. Infestations are spotty in regions due to weak migratory behavior, but can spread rapidly within orchards with close trees. Major markets for Northwest cherries, such as California, do not tolerate infestations.

Find more information on the Western Cherry Fruit Fly at: https://treefruit.wsu.edu/crop-protection/opm/western-cherry-fruit-fly/

Government Websites by CivicPlus®
Arrow Left Arrow Right
Slideshow Left Arrow Slideshow Right Arrow