| Mortality of life stages of cowpea weevil (Coleoptera: Bruchidae) exposed to low pressure at different temperatures. | |
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MedLine Citation:
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PMID: 16022340 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Previous studies have shown that low pressure creates a low oxygen controlled atmosphere that can kill stored-product insects. The current study was conducted to determine the mortality of life stages of the cowpea weevil, Callosbruchus maculatus (F.) (Coleoptera: Bruchidae), exposed to different low pressures and temperatures for various exposure periods. The adults were the most susceptible life stage to low pressure; 99% mortality was achieved within 0.8 h at 32.5 mmHg, 30 degrees C. The pupae were the most tolerant life stage to low pressure, requiring exposure periods between 28.98 and 153.20 h at temperatures of 20-35 degrees C to achieve 99% mortality. Mortality increased with exposure time and also with increasing temperature in all life stages. Early stage eggs (3 h old) and late stage eggs (48 h old) experienced higher mortality (values for LT99 of 42.331 and 46.652 h, respectively) compared with intermediate aged eggs (24 h old; LT99 of 74.735 h) under the same conditions of low pressure and temperature. Dried beans, including cowpea, Vigna unguiculata (Walp.), are currently protected with fumigants. Application of low pressure as a pest management tool represents a potential nonchemical alternative to fumigants such as methyl bromide and phosphine for controlling the cowpea weevil and related bruchids. |
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Authors:
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George N Mbata; Mario Johnson; Thomas W Phillips; Mark Payton |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of economic entomology Volume: 98 ISSN: 0022-0493 ISO Abbreviation: J. Econ. Entomol. Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-07-18 Completed Date: 2005-08-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985127R Medline TA: J Econ Entomol Country: United States |
Other Details:
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Languages: eng Pagination: 1070-5 Citation Subset: IM |
Affiliation:
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Department of Biology, Fort Valley State University, 1005 University Dr., Fort Valley, GA 31030, USA. mbatag@fvsu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Beetles / growth & development* Insect Control / methods* Ovum Pressure Pupa Temperature Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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