From the Field
How to Effectively Manage Codling Moth
Wednesday Apr 08, 2026
Without any intervention, codling moth numbers increase about four-fold from generation to generation. Therefore, targeting the first generation is important to reset the population size to a minimum. Control measures for subsequent generations can be adjusted to the local pest pressure indicated by trap counts.
Degree-Day Models
Wednesday Apr 08, 2026
Have you ever wondered why different pests have different degree-day sums? Here is why:
Powdery Mildew of Cherry: Fungicide Resistance Management Guidelines Spring 2019
Wednesday Apr 01, 2026
Cherry growers in the Pacific Northwest have multiple fungicides at their disposal for managing powdery mildew. Products in the powdery mildew “toolbox” include members of the DMI, QoI, SDHI, quinolone synthetic compounds and multiple “contact” fungicides from other classes (e.g. sulfur and narrow range petroleum oils). A more inclusive list of fungicides is presented in the table below. The table includes fungicide class information, Fungicide Resistance Action Committee (FRAC) group number or code, and resistance risk.
What is DAS?
The Decision Aid System (DAS) is a collaborative project between WSU Extension, the WSU Agricultural Research Center, and partners in agricultural industries. The DAS is a web-based platform designed to transfer time-sensitive information to decision makers. We run insect, disease, disorder, and horticultural models to predict on-farm conditions in real time, and link these site-specific forecasts to appropriate management and pesticide guidelines.
