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WSU Decision Aid System

WSU Decision Aid System

How Does Codling Moth Mating Disruption Work?

Monday January 02, 2017 1:05am
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.

Which Leafroller Species is in Your Orchard?

Monday January 02, 2017 1:05am
There are two leafrollers commonly found in Washington orchards: Pandemis leafroller (PLR) and Obliquebanded leafroller (OBLR). The phenology of the two species is quite different and you need to be sure which species you have for proper management and use the correct model on DAS. PLR used to be more common, but in the past 10 years, OBLR has displaced PLR from many of the production areas.

Delayed Dormant Sprays for Leafrollers

Monday January 02, 2017 1:05am
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.

Why Coverage and Calibration Matter

Monday January 02, 2017 1:05am
Taking the time to ensure that your sprayer is properly calibrated will insure best control of pests and diseases and save time and money. Proper calibration of an airblast sprayer requires that tractor speed, water volume, and nozzle manifold arrangement be coordinated to achieve the best coverage under site-specific operating conditions. Driving too fast is the most common error made in airblast sprayer calibration.

Ways to Reduce Drift

Monday January 02, 2017 1:05am
Spray drift is one of the most important issues facing pesticide applicators. Movement to off-site locations can be caused by wind, poor calibration/adjustment, and operator error.
Decision Aid System v. 6.3.35.1 (DAS) - Tree Fruit Research & Extension Center
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