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WSU Decision Aid System

WSU Decision Aid System

Leafroller and Codling Moth Movement During the Season

Tuesday May 16, 2017 4:04pm
Movement of codling moth and leafrollers into your orchard can be the start of serious damage. Both CM and leafrollers can easily fly 5-7 miles in a single night and their reproduction is as high as those that do not fly. Although 5-7 mile flights are common, the likelihood of the moths coming to your orchard in high numbers is directly related to wind speed, distance from the source, and the environment in between the source and your orchard.

San Jose Scale Management

Tuesday May 16, 2017 4:04pm
San Jose scale is a relatively easy pest to control, but a dangerous one to leave uncontrolled.  After a few years of infestation, limbs and even entire trees can be killed if heavily attacked, and high percentages of the fruit can be infested. Large trees are most often associated with scale problems, because of the suitable habitat they provide and the difficulty of obtaining thorough spray coverage.  However, young trees can also develop a scale problem surprisingly quickly.

Apply Mating Disruption Dispensers Before First Moths Fly

Tuesday May 16, 2017 4:04pm
Mating disruption dispensers work by releasing synthetic pheromone which prevents or delays males from finding and mating with females. Therefore, dispensers need to be placed in your orchard before the first moths fly and mate. First moth flight (= biofix) occurs at around 175 DD. We recommend to place pheromone traps before first apple blossoms open or by 100 DD whichever comes first.

Degree-Day Models

Tuesday May 16, 2017 4:04pm
Have you ever wondered why different pests have different degree-day sums? Here is why:

Canker Removal Now is Critical for Fire Blight Management this Year

Friday February 24, 2017 11:41am
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...
Decision Aid System v. 6.3.29 (DAS) - Tree Fruit Research & Extension Center
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