Intermountain Fruit
The Intermountain Commercial Tree Fruit Production Guide covers pest management and general production issues for growing healthy fruit in Utah, Colorado, Idaho, and Montana.

Upper Grand Valley Pest District
The purpose of the District is to protect commercial growers from insect, disease, and weed infestations as per C.R.S. Title 35, Article 4, the “Pest Control Act”. Enforcement is accomplished through the Mesa County Horticulture Pest & Weed Representative. The Representative enforces the law, responds to complaints, makes sure that neglected or unmanaged fruit trees are cared for or removed, inspects nursery stock, educates the public, and identifies and manages weed infestations. An Advisory Board made up of area growers assists the Inspector and directs the operation of the District.

Cytospora in Peaches
Peach production in western Colorado is threatened by Cytospora canker disease which can significantly reduce fruit production and shorten tree longevity. All peach growers in Colorado are currently dealing with the high infection rates of Cytospora canker and the disease is having a discernible impact on all decisions concerning orchard establishment, management and replacement. Total annual losses caused by Cytospora canker on stone fruit can average 15-20% depending on the area, management practices and cultivars. The potential for a sustained decline in peach production is high unless the extent of infection is reduced. Clearly, healthy peach orchards have a direct impact on the economic health of communities within growing regions in western states.

What is IPM - Integrated Pest Management
Integrated Control was the first term coined to address this concept; it was created by a group of entomologists in the late 1950’s at the University of California at Riverside led by V. Stern. Integrated Control emphasized the selective use of chemicals so that natural enemies were conserved in the ecosystem.
IPM Resources

All Fruit Trees

Dormant and Horticultural Oils
Various oils have been used for centuries to control insect and mite pests. Oils remain an important tool to manage certain pest problems (e.g., scales, aphids, mites) on fruit trees, shade trees and woody ornamental plants. Several highly refined oils extend this usefulness to flowers, vegetables and other herbaceous plants. Oils also can control some plant diseases, such as powdery mildew. Oils used to protect plants have been called by many names, but perhaps horticultural oils best describes them as these are all oils used to control pests on plants.
Aphis
Pruning

Stone Fruits
Coryneum Blight
Coryneum blight (Wilsonmyces carpophilus), also known as shothole blight, is a fungal disease that can cause damage on peach, nectarine, apricot, almonds (ornamental as well as nut bearing), and to a lesser degree, cherries (tart and sweet). Coryneum blight is caused by the fungal pathogen Wilsonmyces carpophilus. The pathogen can infect buds, twigs and branches, blossoms, leaves, and fruit. The disease is most damaging in extended cool and moist conditions of spring, although this disease can occur and cause damage at anytime during lengthy wet weather.
Coryneum Blight Resouces

Western Cherry Fruit Fly
Western cherry fruit fly, Rhagoletis indifferens Curran, was first discovered in western Colorado in the late 1990's. It is now present in most areas where backyard cherries are grown in western Colorado. Western cherry fruit fly larvae feed within the developing and ripening cherries, and make them unusable. Several sprays must be applied to control this pest, making a once easily grown crop much more difficult to grow.
Western Cherry Fruit Fly Resources

Pear/Cherry slugs (aka Sawfly)
Pear slugs (often called “cherry slugs”) feed on the leaves of certain commonly planted trees and shrubs during mid- to late summer. Among the more heavily damaged plants in Colorado are cherry, cotoneaster, plum, apricot, pear, hawthorn and mountain ash.
Sawfly Resources

Walnuts
Walnut Husk Fly
Thousand Canker's Disease / Bark Beetle

Apples & Pears
Timing Chart

Codling Moth
The adult codling moth (order: Lepidoptera, family: Tortricidae) is a small moth, approximately ½ inch in length. The moths are gray with narrow alternating bands of white and have coppery wing tips. The adult moth is rarely seen since it is active at night. The larvae, usually found in fruit, are creamy white to slightly pink. The head and first segment after the head are black. The codling moth overwinters as a full-grown caterpillar within a cocoon, pupating in winter or early spring, typically within days of apple bloom. Mating occurs within a few days of adult emergence, followed by egg laying thereafter.
Codling Moth Resources

Japanese Beetles
CSU Coop Extension Fact Sheet 5.601:  Japanese Beetle   (a PDF file)  [has a button at the top of the page to “Print this fact sheet” which will allow you to print it or download it]
Japanese Beetle - 5.601 - Extension

CSU School of AgsSciences Website – “Questions & Answers about Japanese beetle”  (a PDF file)   [22 page document]
Q&A –Japanese beetle.pdf

  CSU School of AgSciences  Website -- Specialty Crops:  Japanese beetle eradication program in Palisade, CO:    [provides a summary of the eradication program, by Brant Harrison, Bob Hammon, & Whitney Cranshaw]
Japanese Beetle Eradication from Palisade, Colorado - Specialty Crops

Colorado Sun newspaper feature article on Palisade’s battle with Japanese beetle:   [a really good account of Palisade’s battle with JP, written in July 2019]
How a small Colorado town fought the Japanese beetle and won - The Colorado Sun