Tree Fruit (Utah)
Coordinated by Lori R. Spears (, Invasive Pest Survey Coordinator, 
Utah State University


Utah Agricultural Statistics (2013) reported 6,700 bearing acres of tree fruits (apple, apricot, cherry, and peach) and 127 acres of bramble and small fruits in the state, with a combined value of over $28 million. These estimates, however, do not include community supported agricultural (CSA) operations, and small acreage/home garden producers of fruits. The Utah Plant Pest Diagnostic Lab (UPPDL) at Utah State University (USU) provides plant pest diagnostic services to Utah’s citizens, with support from USU Extension, Utah Department of Agriculture and Food, other state and federal agricultural agencies, and Utah’s agricultural industries.

Fruit trees
Peach trees in a Utah orchard. 
Lori Spears, Extension Utah State University


The main objective of this project is to provide commercial and non-commercial fruit producers in Utah access to a pest-insect early warning system, which will help inform the proper choice and timing of best management practices. This project will also recruit and train undergraduate student interns to submit pest observations and to work with extension personnel to provide pest identification and management information to the agricultural industry and the general public. This project will focus on the monitoring, identification, and control of Spotted Wing Drosophila and Brown Marmorated Stink Bug, but may also include information on other pests of concern to Utah fruit growers. 

Utah State University Extension   Utah Pests Logo


Spotted Wing Drosophila (SWD; Drosophila suzukii) is an exotic and invasive insect pest of soft summer fruits that is native to many areas in Asia. SWD is now found in nearly every U.S. state and is considered a major pest problem in many parts of the country, including California, the Pacific Northwest, and the Northeast. SWD was first confirmed in Utah in late summer of 2010, and has been found in Rich, Cache, Box Elder, Weber, Davis, and Utah Counties.

Brown Marmorated Stink Bug (BMSB; Halyomorpha halys) is an invasive insect pest that is native to Asia and was first found in the U.S. in the late 1990’s. BMSB has an expansive host range, including fruits, vegetables, and woody plants. BMSB is also a nuisance pest because it uses homes as overwintering sites. BMSB was first detected in Utah during the fall of 2012, and has been found in Salt Lake and Utah Counties.

Important Pests

Spotted Wing Drosophila, Brown Marmorated Stink Bug, Peach Twig Borer, Codling Moth, Pear Rust Mite, Pear Leaf Blister Mite.

Brown marmorated stinkbug
Brown Marmorated Stink Bug (Halyomorpha halys Stal) 
Susan Ellis,