Document Detail

Influence of carbon dioxide anesthesia on chlorpyrifos toxicity in the German cockroach (Dictyoptera: Blattellidae).
MedLine Citation:
PMID:  7517968     Owner:  NLM     Status:  MEDLINE    
Insecticide-susceptible (Orlando normal) and multi-insecticide-resistant (Village Green) adult male German cockroaches, Blattella germanica (L.), were exposed to carbon dioxide (CO2) gas in either varying durations or multiple exposures of fixed duration followed by topical treatment with acetone or chlorpyrifos (LD25) to evaluate the effect of CO2 anesthesia on chlorpyrifos toxicity. CO2 anesthesia did not increase chlorpyrifos toxicity in either strain regardless of exposure duration up to 1 h. However, multiple CO2-induced knockdowns alone caused mortality and increased chlorpyrifos toxicity. Twenty-four-hour weight loss was independent of CO2 duration exposure by strain. Village Green and Orlando cockroaches lost 5.3 and 7.6% of their weight in 24 h when treated with acetone and 10.5 and 12.8% when treated with chlorpyrifos, respectively. Conversely, 0- and 24-h weight loss increased with increasing CO2-induced knockdowns regardless of strain or topical treatment. Based on these results, CO2 used either once of limited duration (< or = 15 min) or multiple times of short duration, not to exceed four total knockdowns, does not increase chlorpyrifos toxicity in the adult male German cockroach.
S M Valles; P G Koehler
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of economic entomology     Volume:  87     ISSN:  0022-0493     ISO Abbreviation:  J. Econ. Entomol.     Publication Date:  1994 Jun 
Date Detail:
Created Date:  1994-08-05     Completed Date:  1994-08-05     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  2985127R     Medline TA:  J Econ Entomol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  709-13     Citation Subset:  IM    
Department of Entomology and Nematology, University of Florida, Gainesville 32611-0620.
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MeSH Terms
Carbon Dioxide / administration & dosage*
Chlorpyrifos / administration & dosage*
Cockroaches / physiology*
Drug Synergism
Insecticide Resistance
Reg. No./Substance:
0/Insecticides; 124-38-9/Carbon Dioxide; 2921-88-2/Chlorpyrifos

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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