ROOT HERBIVORES ARE MAJOR HORTICULTURAL PESTS OFTEN REQUIRE CHEMICAL INSECTICIDES TO CONTROL. INFECTED PLANTS ARE DISPOSED AS THEY ARE DEEMED UNACCEPTABLE FOR SALE. IN SEEDLING CROPS, HEALTHY ROOTS ARE IMPORTANT FOR SURIVIVAL AND GROWTH FOLLOWING PLANTING, ALTHOUGH SOME ROOT DAMAGE MAY BE ACCEPTABLE. WE LACK RELIABLE TOOLS TO DETERMINE DAMAGE THRESHOLDS FOR FIELD PLANTED SEEDLINGS, ESPECIALLY THOSE INFECTED WITH BLACK VINE WEEVIL (BVW) IN NURSERIES. WE ALSO NEED BETTER INFORMATION ON THE BIOLOGICAL CONTROL EFFICACY FOR BVW AND POTENTIAL RESIDUAL CONTROL OF NATIVE PESTS. OUR INTEGRATED RESEARCH AND EXTENSION PROJECT WILL IMPROVE UNDERSTANDING OF PLANT RESPONSES TO ROOT HERBIVORY BY BVW, WHILE COMPARING CHEMICAL AND BIOLOGICAL CONTROL OPTIONS, AND ENSURING RESULTS ARE COMMUNICATED TO NURSERY GROWERS AND OTHER END-USERS OF NURSERY STOCK. WE FOCUS ON HUCKLEBERRY, A HIGHLY VALUED SHRUB SPECIES THAT IS WIDELY PLANTED ACROSS THE NORTHWEST THAT HAS DECLINED SUBSTANTIALLY OVER THE LAST 50+ YEARS. OUR SPECIFIC OBJECTIVES INCLUDE: (I) EXAMINE HOW BVW ROOT DAMAGE INFLUENCES SEEDLING ROOT PHYSIOLOGY AND GROWTH, (II) SINGLE AND COMBINED APPLICATIONS OF CHEMICAL INSECTICIDES, AZADIRACHTIN, AND A NEMATODE CONTROL OF BVW AND RESIDUAL CONTROL OF RUSTY TUSSOCK MOTH, AND (III) BROADLY DISSEMINATE THE RESULTS THROUGH MULTIPLE EXTENSION WORKSHOPS AND PUBLICATIONS. OUR APPROACH TO STUDYING BVW EFFECTS ON PLANTS AND CONTROL OPTIONS WILL BE DONE THROUGH EXPERIMENTS IN THE GREENHOUSE, LABORATORY, AND THE FIELD. END PRODUCTS WILL INCLUDE A DAMAGE THRESHOLD TO DETERMINE ACCEPTABLE BVW INFESTATION INTENSITY. RESULTS WILL IMPROVE INTEGRATED PEST MANAGEMENT PROGRAMS THAT WILL BENEFIT THE HORTICULTURAL INDUSTRY AND LAND MANAGERS.