Document Detail

Alternative food sources and overwintering feeding behavior of the boll weevil, Anthonomus grandis boheman (Coleoptera: Curculionidae) under the tropical conditions of Central Brazil.
MedLine Citation:
PMID:  20305896     Owner:  NLM     Status:  MEDLINE    
The boll weevil causes serious damage to the cotton crop in South America. Several studies have been published on this pest, but its phenology and behavior under the tropical conditions prevailing in Brazil are not well-known. In this study the feeding behavior and main food sources of adult boll weevils throughout the year in Central Brazil was investigated. The digestive tract contents of insects captured in pheromone traps in two cotton fields and two areas of native vegetation (gallery forest and cerrado sensu stricto) were analyzed. The insect was captured all through the year only in the cerrado. It fed on pollen of 19 different plant families, on Pteridophyta and fungi spores and algae cysts. Simpson Index test showed that the cerrado provided greater diversity of pollen sources. In the beginning of the cotton cycle, the plant families used for pollen feeding were varied: in cotton area 1, the weevil fed on Poaceae(50%), Malvaceae and Smilacaceae (25% each); in cotton area 2 the pollen sources were Malvaceae (50%), Asteraceae (25%) and Fabaceae and Clusiaceae (25% each); in the cerrado they were Chenopodiaceae (67%) and Scheuchzeriaceae (33%). No weevils were collected in the gallery forest in this period. After cotton was harvested, the family Smilacaceae was predominant among the food plants exploited in all the study areas. These results help to explain the survivorship of adult boll weevil during cotton fallow season in Central Brazil and they are discussed in the context of behavioral adaptations to the prevailing tropical environmental conditions.
Paulina de A Ribeiro; Edison R Sujii; Ivone R Diniz; Maria A de Medeiros; Maria L Salgado-Labouriau; Marina C Branco; Carmen S S Pires; Eliana M G Fontes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Neotropical entomology     Volume:  39     ISSN:  1519-566X     ISO Abbreviation:  Neotrop. Entomol.     Publication Date:    2010 Jan-Feb
Date Detail:
Created Date:  2010-03-22     Completed Date:  2010-05-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101189728     Medline TA:  Neotrop Entomol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  28-34     Citation Subset:  IM    
Cenargen, Embrapa Recursos Gen?ticos e Biotecnologia, Bras?lia, DF, Brasil 70770-900.
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MeSH Terms
Feeding Behavior*
Weevils / physiology*

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

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