Field-Cage and Laboratory Evaluations of Semiochemical-Based Baits for Managing Western Corn Rootworm (Coleoptera: Chrysomelidae)
| Autor: | D. R. Lance, G. R. Sutter |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Carbamate
Ecology biology Starch business.industry medicine.medical_treatment Pest control General Medicine biology.organism_classification chemistry.chemical_compound Western corn rootworm Animal science Agronomy chemistry Insect Science Carbaryl medicine Gourd Cucurbita foetidissima Semiochemical business |
| Zdroj: | Journal of Economic Entomology. 83:1085-1090 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/83.3.1085 |
| Popis: | Adult western corn rootworms, Diabrotica virgifera virgifera LeConte, were offered baits containing toxicant (carbaryl), a feeding stimulant (the curcurbitacins in powdered root of buffalo gourd, Cucurbita foetidissima H.B.K. [BGRPl), and a nonpheromonal attractant (TIC; 1,2,4-trimethoxybenzene, indole, and trans-cinnamaldehyde, 1:1:1). Components were encapsulated into starch granules or were formulated into particles by Bio- Control (Warwick, Queensland, Australia). In laboratory assays, baits with approximately 0.5% carbonyl and 3-5% BGRP effectively killed D. v. virgifera . Baits with these components plus 0.3-1.5% TIC were broadcast over maize in walk-in field cages; adult D. v. virgifera beetles were released, and surviving beetles were counted after 24-72 h. In cages treated at 2-32 kg/ha of starch bait, numbers of beetles were reduced by 69-94%, respectively, relative to untreated cages. Starch granules containing only carbaryl (8 kg/hal killed few or no beetles, but granules with carbaryl plus BGRP reduced numbers of beetles per cage by approximately 80% in 24 h. Efficacy of baits was not affected by adding 1.5% TIC or by phenology of maize in the cages. Activity of baits declined after 2-3 wks in the field; 3-wk-old baits reduced numbers of beetles per cage by approximately 45%, whereas freshly applied baits produced reductions of approximately 85%. Although not ideal, these formulations appear suitable for testing the concept of semiochemical-based baits on a larger scale. |
| Databáze: | OpenAIRE |
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