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

Tuesday March 06, 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.

Fireblight Prediction and Management

Tuesday March 06, 2018 2:49pm
Many consider blight an apparently random curse, and part of the game a pome fruit grower must play. As outbreaks do not occur yearly, damage always seems to be somebody else's problem, until it suddenly appears in your orchard.

Western Flower Thrips

Tuesday March 06, 2018 2:48pm
Western flower thrips feeding causes bloom distortion and poor fruit set. Egg-laying punctures create "pansy spot" on some cultivars. Adults can be sampled using either beating trays or blue sticky cards.
Decision Aid System v. 6.5.0 (DAS) - Tree Fruit Research & Extension Center
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