WSU Decision Aid System

WSU Decision Aid System

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.

Campylomma Bug

Monday February 26, 2018 4:49pm
Campylomma can be a pest during the bloom period when it feeds on young developing fruit. However, it is a beneficial predaceous insect that is valuable in control of soft bodied insects (such as spider mites) throughout the rest of year. DAS predicts the phenology of Campylomma during the spring, but beating tray samples need to be taken before and during the spring bloom period to determine if Campylomma is present and whether treatment is necessary.
Decision Aid System v. 6.8.0 (DAS) - Tree Fruit Research & Extension Center
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