Tuesday, 16 November 2004
D0274

Preliminary assessment of egg releases for establishment of Sasajiscymnus tsugae on eastern hemlock

Jerome F. Grant, jgrant@utk.edu1, Daniel Palmer2, James R. "Rusty" Rhea, rrhea@fs.fed.us3, Glenn Taylor4, Paris L. Lambdin, plambdin@utk.edu1, and Isaac Deal1. (1) University of Tennessee, Department of Entomology and Plant Pathology, 205 Ellington Plant Sciences Building, Knoxville, TN, (2) New Jersey Department of Agriculture, Division of Plant Industry, West Trenton, NJ, (3) USDA Forest Service, Forest Health Protection, 200 WT Weaver Blvd, Asheville, NC, (4) Great Smoky Mountains National Park, 107 Park Headquarters Road, Gatlinburg, TN

Hemlock woolly adelgid is a serious pest of hemlocks in the eastern United States and has recently invaded Tennessee and North Carolina, where populations are expanding at an alarming rate. The enhancement, evaluation, and augmentation of biological control efforts within this area will help to reduce the impact of the hemlock woolly adelgid on hemlocks and the ecosystem it comprises. A predatory beetle, Sasajiscymnus (=Pseudoscymnus tsugae [Coccinellidae]), is currently reared in several laboratories and released as adults in the field. Unfortunately, the demand for these beetles is much greater than the supply. The development of improved release strategies would reduce costs, manpower, and time needed for rearing this predaceous beetle. Thus, the objective of this research was to conduct studies to develop and evaluate protocols for egg releases to establish populations of S. tsugae to augment the regional biological control effort against hemlock woolly adelgid. This research demonstrated that S. tsugae released as eggs could develop successfully to adulthood on eastern hemlock under field conditions. This poster will summarize the preliminary results of this initial study.


Species 1: Homoptera Adelgidae Adelges tsugae (Hemlock woolly adelgid)
Species 2: Coleptera Coccinellidae Sasajiscymnus tsguae
Species 3: Coleoptera Coccinellidae Pseudoscymnus tsugae
Keywords: biological control, forests

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