Nematodes, Entrust via chemigation, and the application of Trichogramma sibericum showed to be effective in reducing the pests.View the full outcome
Investigator: Deborah Henderson, ES Cropconsult, Vancouver, British Columbia
Project locations: British Columbia and Oregon
The primary challenge to cranberry production in Oregon, Washington and British Columbia is insect pests which are able to survive the mild western winters. Disease pressure is high for cranberry production in other areas but less so on the west coast, making it more feasible to grow organic cranberries in this area. Weeds are difficult and even for the conventional growers, hand weeding is often used. There are few tools available for organic management of insects in cranberries and, according to one of our collaborators, those that are available (e.g. Pyganic) do not provide satisfactory levels of control. While there has been a considerable amount of research on different biological methods for controlling key pests, none of this research has been carried through to develop a management program that organic cranberry growers can follow.
The objective of this study is to first identify suitable tools for management of the three key regional cranberry insect pests: blackheaded fireworm, cranberry girdler and black vine weevil. A second goal is to develop an integrated pest management (IPM) program for these pests using the most effective tools identified. As part of this IPM program, specific guidelines will be developed for how to use biological controls and compliant materials under the unique circumstances of cranberry production. The bulk of the trials for this project will be conducted on commercial certified organic farms.
Our growers, especially those wanting to transition to organic, have indicated to us that all of the potential biological solutions for these three pest need to be examined not just for efficacy but for ease of use and cost effectiveness within the cranberry system. Information from growers and researchers in other areas where organic cranberry production is active (e.g. Quebec) will be gathered and applied when appropriate. We are in contact with these groups on a regular basis and occasionally collaborate on research.