Developing a comprehensive pest management plan for white grubs in North Carolina turfgrass
Callie Freeman, email@example.com and Rick Brandenburg, firstname.lastname@example.org. North Carolina State University, Department of Entomology, Box 7613, Raleigh, NC
White grubs have become an increasingly important pest of high quality turfgrass in North Carolina. Achieving adequate control of white grubs has proven challenging given that the species complex in NC is not well understood and includes species for which little biological information exists. The goal of this research is to establish a sound database of pest biology and ecology as well as develop a cost effective, integrated approach to managing white grubs in NC turfgrass. Over the past three years, an extensive state-wide network of pheromone and light traps were used to determine species composition, distribution, and adult flight timing. The Japanese beetle (Popillia japonica), masked chafers (Cyclocephela spp.), and Oriental beetle (Exomala orientalis) were the most predominate species trapped. Adult beetle flight varied from year to year and between sites for all species trapped. Surround® WP, commercial Milky Spore powder, and elemental sulfur were tested in field and greenhouse studies, as well as small arena and large cage choice assays to determine potential as alternative management strategies. Commercial Milky Spore powder failed to reduce grub densities in multi-year field trials as well as greenhouse assays. The effectiveness of elemental sulfur differed between field trials as well as species targeted. Large cage and small arena oviposition choice tests revealed no repellency of sulfur or Surround® WP to adult female P. japonica. In 2007, conventional grub insecticides were applied at different timings, reduced rates, and split applications to optimize the effectiveness and possibly modify use patterns of chemical insecticides.
Species 1: Coleoptera Scarabaeidae Popilliajaponica (Japanese beetle)