This survey provides the small grains industry with current information about the size and location of important insect populations.
For more information about the wheat and barley insect pest survey contact:
Assistant Professor, WSU Department of Entomology
Weekly Insect Sampling Report: July 31, 2015
Overview: Beginning the week of May 21st, the small grains team at Washington State University began conducting weekly sampling of insect pest populations in wheat and barley fields throughout the dryland region of Washington State. Current funding for the regional insect sampling network comes from WSU Extension. The objective of this monitoring network is to alert the small grains industry about the size and location of damaging insect pest populations to aid in early detection and management efforts for each insect pest. In this fourth week we sampled 10 fields for 5 pests: Hessian fly, Aphids, Cereal Leaf Beetle (CLB), Grasshoppers, Wheat Midges, and Wheat Head Armyworm (WHA) (complex). Data for previous weeks are also published on the smallgrains.wsu.edu website
Monitoring summary: The table below presents the insect monitoring results from the week of July 31th. Shown are the counts of each insect pest from fields located throughout the dryland region in Eastern Washington State. We have completed sampling throughout the region for 2015, as all of our sampled fields have been harvested.
Cells shown in green indicate the pest was not found. Cells colored yellow indicate the pest was found below economic thresholds. Growers in these regions should be on the lookout for these pests but management action is not warranted unless populations exceed thresholds. Cells shown in red indicate the pest was found at higher than average levels. As growers continue to harvest insect populations have remained low and in general treatments are likely not needed.
At many sites we are also finding high numbers of beneficial insects such as the ladybird beetle and the soft-winged flower beetle (Collops spp), which is often mistaken for the cereal leaf beetle. These beneficial insects play a great role in managing pest species! They are very sensitive to insecticides that are labeled for use on wheat, so balance the pros and cons before making a spray application.