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WSU Decision Aid System

WSU Decision Aid System

Delayed Dormant Sprays for Leafrollers

Tuesday January 02, 2018 12:29am
Pandemis leafroller (PLR) and oblique-banded leafroller (OBLR) have different phenologies which are well documented on DAS. Delayed dormant sprays can work well for PLR, but are generally too early in the season for efficacy against larvae of OBLR.

Canker Removal Now is Critical for Fire Blight Management this Year

Tuesday January 02, 2018 12:29am
No one wants fire blight in their orchard next year. For fire blight to take off in your orchard next year three things need to be there: the pathogen, the warm conditions and...

Woolly Apple Aphid

Tuesday January 02, 2018 12:29am
Woolly apple aphid (WAA) has become more common over the past few years and is a quarantine threat for export to certain countries. WAA can be found feeding on the roots as well as occurring in the tree canopy where it can appear as a white cottony mass on pruning scars or shoots.

Monitoring Adult Codling Moth

Tuesday January 02, 2018 12:29am
Adult codling moth (CM) are monitored with traps baited with either CM pheromones or a mixture of pheromones and an attractant (Combo D/A lure). Pheromone traps should be placed in the upper 1/3 of the tree canopy before first apple blossoms open or by 100 DD since January 1 whichever comes first. If you are not using mating disruption...

New CM Control Strategies

Tuesday January 02, 2018 12:29am
A new method of controlling codling moth has been developed at WSU where timing of the sprays is altered to take advantage of the slow start of egg laying.
Decision Aid System v. 6.7.0 (DAS) - Tree Fruit Research & Extension Center
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