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WSU Decision Aid System

WSU Decision Aid System

NEW Model: Bloom Phenology - Ambrosia

Tuesday April 03, 2018 9:21am
We just added the bloom phenology model for Ambrosia. The bloom 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.

Factors Affecting Bee Pollination of Tree Fruits

Wednesday March 21, 2018 11:53am
Nearly 1,000 species of bees occur in the Pacific Northwest, but only a small number of species are useful in the pollination of orchard crops. Pesticide use and loss of appropriate nesting habitat have reduced the numbers of wild bee pollinators, leaving most of the pollination for commercial orchards dependent on honeybees. The success of honeybee pollination in tree fruits is affected by a number of factors, which in part can be manipulated by orchardists and beekeepers.

Combining Leafroller and Codling Moth Control Tactics

Wednesday March 21, 2018 9:30am
The period of time when overwintering leafroller (LR) larvae are most susceptible to the new insecticides overlaps with the beginning of the codling moth (CM) egg laying period. Some new insecticides will kill overwintering leafroller larvae as well as codling moth eggs that are laid on top of the insecticide residues.

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.
Decision Aid System v. 6.8.0 (DAS) - Tree Fruit Research & Extension Center
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