Management of Cottonwood Leaf Beetle (Coleoptera: Chrysomelidae) with a Novel Transplant Soak and Biorational Insecticides to Conserve Coccinellid Beetles.
From: Department of Entomology, University of Minnesota, 219 Hodson Hall, 1980 Folwell Avenue, St. Paul, MN 55108, USA.
Journal of economic entomology
- Publish Date: Feb 2006
- ISSN: 0022-0493
- Volume: 99
- Issue: 1
- Pages: 102-8
- Medium: Print
- Language: English
- Citation (JAMA): Tenczar Emily G, Krischik Vera A, et al. Management of Cottonwood Leaf Beetle (Coleoptera: Chrysomelidae) with a Novel Transplant Soak and Biorational Insecticides to Conserve Coccinellid Beetles.. J. Econ. Entomol. Feb 2006;99:102-8
Abstract
Biorational foliar sprays and a novel application method of soaking transplants in imidacloprid were evaluated for control of adult and larval cottonwood leaf beetle, Chrysomela scripta F., on hybrid poplar, with emphasis on conservation of coccinellid predators. Foliar sprays of four biorational insecticides killed adult and larval C. scripta: Bacillus thuringiensis (B.t.) variety tenebrionis (Novodor), B.t. variety kurstaki (Raven), spinosad (Conserve SC), and azadirachtin (Azatin XL) (larvae only) but did not kill two species of coccinellids, Hippodamia convergens Guérin-Meneville and Harmonia axyridis (Pallas). Only imidacloprid (Admire 2) and carbaryl (Sevin XLR Plus) killed two species of coccinellids and adult and larval C. scripta. We evaluated a novel stick soak method for systemically applying imidacloprid by soaking poplar sticks in Admire 2 solutions of 3 and 6 ml/liter for 48 h before planting. The imidacloprid in the sticks was translocated to the leaves and reduced survivorship of adult and larval C. scripta for 10 mo without any symptoms of phytotoxicity. The novel stick soak method did not kill two species of coccinellids when foraging on leaves.
Mesh Headings (Keywords): Agriculture, Animals, Bacillus thuringiensis, Beetles, Carbaryl, Cordyceps, Drug Combinations, Imidazoles, Insecticides, Limonins, Macrolides, Nitro Compounds, Pest Control, Biological, Populus, Survival Analysis
Check for Full Text / PubMed Unique Identifier (PMID): 16573329
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