Measurements of spray coverage in Utah apple and cherry orchards
Shawn A. Steffan, firstname.lastname@example.org, Diane Alston, email@example.com, Dale Rowley2, Curtis Rowley2, and Raymond Rowley2. (1) Utah State University, Department of Biology, 5305 Old Main Hill, Logan, UT, (2) Cherry Hill Farms, PO Box 1148, Santaquin, UT
In Utah, dense populations of codling moth and Western cherry fruit fly represent constant and substantial threats to tree fruit production. Non-uniform or otherwise inadequate spray coverage can greatly reduce treatment efficacy. Measurements of spray coverage were made using water-sensitive cards affixed at various positions in the tree canopy. A conventional rear air-blast sprayer and a tower sprayer were used to deliver a high water volume/acre (200 gpa) and a low volume/acre (100 gpa). The degree of coverage on the water-sensitive cards was greater in the plots sprayed with the tower sprayer, and the higher volume/acre afforded better coverage than the lower volume/acre, though there was much variability within the canopy.
Species 1: Lepidoptera Tortricidae Cydiapomonella (codling moth) Species 2: Diptera Tephritidae Rhagoletisindifferens (Western cherry fruit fly) Keywords: canopy coverage, apple and cherry orchards