The California poppy may have potential as a cover crop to attract beneficial insects to eastern Washington vineyards. Washington State University scientists have found that flowering cover crops can attract beneficial insects and predators to orchards and vineyards, but more research is needed to determine the optimum flower mixture for the arid climate of eastern Washington. Rose bushes are now being planted near tree fruit orchards to attract and help overwinter beneficial insects, thanks to U.S. Department of Agriculture research. But the concept of using cover crops as an insectary for biological control has only recently been studied in Washington, […]