Document Detail

Effect of kaolin on fitness and behavior of Choristoneura rosaceana (Lepidoptera: Tortricidae) larvae.
MedLine Citation:
PMID:  16334335     Owner:  NLM     Status:  MEDLINE    
The mechanisms by which kaolin, a clay particle film formulation, affects the fitness and behavior of larvae of obliquebanded leafroller, Choristoneura rosaceana (Harris), were investigated. Feeding experiments tested kaolin as a physical barrier versus a physiological toxin for larvae that consumed kaolin applied either to apple (Malus spp.) leaves or mixed in artificial diet. Behavioral experiments tested the effects of kaolin applied to apple leaves on neonate dispersal and leaf rolling by third and fourth instars. When larvae fed on apple leaves sprayed with kaolin, mortality and time to pupation of larvae increased significantly, whereas pupal mass significantly decreased. When larvae consumed kaolin mixed into an artificial diet, however, the effects on mortality, pupation time, and pupal mass were negligible. There may be minor physiological effects from consumption because male time to pupation was delayed for larvae fed diets containing the highest concentration of kaolin. In behavioral experiments, neonate larvae dispersed more quickly off plants covered with kaolin than control plants, and kaolin delayed the construction of leaf shelters by third and fourth instars. We showed that the effects of kaolin on C. rosaceana larvae are primarily physical, causing changes in dispersal and rolling behaviors and as a physical barrier to feeding.
T E Sackett; C M Buddle; C Vincent
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of economic entomology     Volume:  98     ISSN:  0022-0493     ISO Abbreviation:  J. Econ. Entomol.     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-12-07     Completed Date:  2006-02-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985127R     Medline TA:  J Econ Entomol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1648-53     Citation Subset:  IM    
Department of Natural Resource Sciences, McGill University, Macdonald Campus, 21,111 Lakeshore Rd., Ste. Anne de Bellevue, QC, H9X 3V9 Canada.
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MeSH Terms
Behavior, Animal / drug effects
Insect Control / methods
Kaolin / administration & dosage,  pharmacology*
Larva / growth & development,  physiology
Lepidoptera / growth & development,  physiology*
Plant Leaves
Reg. No./Substance:

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

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