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WSU Decision Aid System

WSU Decision Aid System

Leafroller Sampling Made Easier

Tuesday March 13, 2018 9:02am
Leafrollers are nearly impossible to sample when they are in the first 2-3 instars because they are so small. DAS provides intervals during which sampling should occur well ahead of time. To sample leafrollers...

Bt Applications for Leafrollers

Tuesday March 13, 2018 9:02am
Bacillus thuringiensis (Bt) is a bacterium that must be eaten by lepidopteran larvae (caterpillars) to be effective. Temperatures need to be above 65°F for 3 or more days so that larvae have a chance to feed on it before sunlight breaks it down.

NEW Model: Bloom Phenology

Monday March 05, 2018 2:50pm
DAS now predicts bloom phenology for Gala, Red Delicious, and Cripps Pink. The models predict the start and duration for 8 different bud development and bloom stages: green tip, half-inch green, tight cluster, first pink, full pink, first bloom, full bloom, and petal fall.

Degree-Day Models

Monday March 05, 2018 2:47pm
Have you ever wondered why different pests have different degree-day sums? Here is why:

How Does Codling Moth Mating Disruption Work?

Monday February 26, 2018 4:49pm
Mating disruption dispensers work by releasing synthetic pheromone which prevents or delays males from finding females, thus reducing the reproductive rate of the population. Now is the time to decide which dispensers to place in the orchard so you have enough time for ordering and to organize your work force.
Decision Aid System v. 6.7.0 (DAS) - Tree Fruit Research & Extension Center
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