David Mota-Sanchez, motasanc@msu.edu1, Bert, M. Cregg, cregg@msu.edu2, Deborah G. McCullough, mccullo6@msu.edu1, Therese M. Poland, tpoland@fs.fed.us3, and Robert M. Hollingworth, rmholl@msu.edu1. (1) Michigan State University, Department of Entomology, 206 Center for Integrated Plant Systems, East Lansing, MI, (2) Michigan State University, Department of Horticulture and Department of Forestry, 214 Plant and Soil Science Building, East Lansing, MI, (3) USDA Forest Service, NCRS, 1407 S. Harrison Rd., Rm. 220, East Lansing, MI
Labeled and unlabeled imidacloprid (1:2400) was applied via trunk injection to study the distribution, persistence and metabolism of this compound in green ash, Franxinus pennsylvanica and white ash, F.americana . The effect of imidacloprid on Emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) adult mortality was also studied. Following imidacloprid injection, half of the trees were kept well watered and half were subjected to water stress. We collected leaf, twig, trunk, and root samples at 0, 2, 7, 21, 60,105 and 150 days after treatments (DAT). Samples were oxidized in a biological tissue oxidizer. The resultant 14CO2 was trapped in scintillation cocktail and radioactivity was determined by LSC. A subsample of fresh leaves was collected 21 and 60 DAT for bioassays on adult EAB. Labeled compound in leaves increased steadily from 2 DAT to 150 DAT. A small amount of labeled compound was present in twigs and the trunk. Results did not indicate a significant effect of water stress on 14C-imidacloprid movement. Imidacloprid also very effectively controlled adults of the EAB at 21 and 60 DAT.
Species 1: Coleoptera Buprestidae
Agrilus planipennis (emerald ash borer)
Keywords: metabolism, imidacloprid
