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Author (up) Mbata, G.N.; Johnson, M.; Phillips, T.W.; Payton, M. url  openurl
  Title Mortality of life stages of cowpea weevil (Coleoptera: Bruchidae) exposed to low pressure at different temperatures Type Journal Article
  Year 2005 Publication Journal of Economic Entomology Abbreviated Journal J Econ Entomol  
  Volume 98 Issue 3 Pages 1070-1075  
  Keywords Animals; Beetles/*growth & development; Insect Control/*methods; Ovum; Pressure; Pupa; Temperature; Time Factors  
  Abstract 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.  
  Address Department of Biology, Fort Valley State University, 1005 University Dr., Fort Valley, GA 31030, USA. mbatag@fvsu.edu  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0022-0493 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:16022340 Approved no  
  Call Number WIU @ je-engel @ Serial 75  
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