Powdery Mildew of Cherry: Fungicide Resistance Management Guidelines Spring 2019

Saturday Apr 01, 2023

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

Saturday Apr 01, 2023

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.

Weather Stations on DAS

Friday Mar 31, 2023

Weather data makes DAS run. However, which weather station(s) to choose is an important consideration for any DAS user. We now have more options available than ever before to provide weather data for ...

Time Machine

Friday Mar 24, 2023

The WSU DAS provides advance warning of when key events will occur in tree fruit orchards. However, to better understand the current season, sometimes we need to think about the past. For the first ti...

2023 Codling Moth Workshop

Wednesday Mar 22, 2023

Thank you all for your participation at the 2023 DAS Codling Moth Workshop. At this event, we discussed how the DAS codling moth model works, what inputs are used in the model, the different types of...