Degree-Day Models

Friday Apr 08, 2022

Have you ever wondered why different pests have different degree-day sums? Here is why:

NEW! How To page on DAS

Thursday Apr 07, 2022

Introducing a new feature of the DAS website! We have added a “How To” page featuring videos showing how to register for DAS, subscribe to weather stations, use the many different models a...

Powdery Mildew of Cherry: Fungicide Resistance Management Guidelines Spring 2019

Friday Apr 01, 2022

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.

San Jose Scale Management

Friday Apr 01, 2022

San Jose scale is a relatively easy pest to control, but a dangerous one to leave uncontrolled. After a few years of infestation, limbs and even entire trees can be killed if heavily attacked, and high percentages of the fruit can be infested. Large trees are most often associated with scale problems, because of the suitable habitat they provide and the difficulty of obtaining good spray coverage. However, young trees can also develop a scale problem surprisingly quickly. San Jose scale is a pest that is easily prevented, but hard to control if the populations have built up too much.

Increasing price

Friday Mar 06, 2020

In order to continue to function, the WSU-DAS group has decided they must raise user rates