Obliquebanded leafroller displaces pandemis

The obliquebanded leafroller has displaced pandemis as the primary leafroller pest in north central Washington. Mike Doerr, entomologist with Washington State University in Wenatchee, said that several years ago, more than 80 percent of the leafrollers found in the region’s orchards were pandemis, but that species is not found very much any more. Whereas pandemis is limited to apples, the obliquebanded leafroller has a broad host range, and a slightly different life cycle. The obliquebanded leafroller emerges later in the spring, which means that applications of Lorsban (chlorpyrifos) at the delayed-dormant stage will not impact it as much as they […]