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2012 - Washington Red Raspberry Commission

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Various trap styles and baits for traps have been evaluated by researchers in other regions, with<br />

much of the work being done in Oregon. Initial testing in Northwest <strong>Washington</strong> shows<br />

differences in efficacy between traps and baits. Testing of traps and baits were not tested until<br />

July in <strong>2012</strong> in <strong>Washington</strong> so we were not able to detect preference differences throughout the<br />

season. By continuing to test these traps in Northwest <strong>Washington</strong> throughout the fruit bearing<br />

season, and by comparing our data with research done in other regions, we will be able to<br />

develop better scouting guidelines improving management decisions.<br />

Relationship to WRRC Research Priority(s):<br />

Life cycle evaluation of SWD is a #1 priority of the <strong>Washington</strong> <strong>Red</strong> <strong>Raspberry</strong> <strong>Commission</strong>.<br />

Objectives:<br />

Test novel traps and baits for SWD throughout the season.<br />

Procedures:<br />

Test novel traps and baits for SWD throughout the season.<br />

Several traps for SWD are available commercially and new home-made traps are being<br />

developed each year. The two most commonly used baits are apple cider vinegar and yeastsugar<br />

that have been tested in Northwest <strong>Washington</strong>. In collaboration with Amy Dreves from<br />

Oregon State University, this project will evaluate several promising traps and bait combinations<br />

from May through August (or the end of raspberry harvest) on at least ten farms, including an<br />

organic farm and fields suspected of higher SWD populations. Up to 12 bait/trap combinations<br />

will be tested on 1-2 farms as a demonstration and 6-8 bait/trap combinations will be tested on<br />

all other farms. Four replications of each bait/trap combination will be placed in each field,<br />

arranged using a complete randomized block design. Traps will be checked weekly for male and<br />

female SWD in each trap.<br />

This work will continue the preliminary work performed in <strong>2012</strong>, with a more in-depth study<br />

done on different monitoring systems.<br />

Anticipated Benefits and Information Transfer:<br />

This study will give growers improved options to monitor for SWD early in the season and into<br />

the raspberry harvest season. If growers are confident with monitoring techniques, they may be<br />

able to schedule the first pesticide treatment more closely to SWD biology.<br />

Data will be presented on the WSU Whatcom County Extension web page and at least one field<br />

day will be held prior to the start of harvest for growers to observe different traps and give<br />

feedback on the pros and cons of each.<br />

013

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