Evaluation of Bacillus thuringiensis Pathogenicity for a Strain of the Tick, Rhipicephalus microplus, Resistant to Chemical Pesticides

The pathogenicity of four native strains of Bacillus thuringiensis against Rhipicephalus (Boophilus) microplus (Canestrine) (Acari: Ixodidae) was evaluated. A R. microplus strain that is resistant to organophosphates, pyrethroids, and amidines, was used in this study. Adult R. microplus females were...

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Published inJournal of insect science (Tucson, Ariz.) Vol. 10; no. 186; pp. 1 - 6
Main Authors Fernández-Ruvalcaba, Manuel, Peña-Chora, Guadalupe, Romo-Martínez, Armando, Hernández-Velázquez, Víctor, Parra, Alejandra Bravo de la, Rosa, Diego Pérez De La
Format Journal Article
LanguageEnglish
Published United States University of Wisconsin Library 2010
Oxford University Press
Subjects
Acari
Analysis of Variance
Animals
Bacillus thuringiensis
Bacillus thuringiensis - pathogenicity
Biological control
Boophilus microplus
Control
feeding
Female
Fertility - physiology
Glycoprotein gp130
Health aspects
Immersion
Insecticide Resistance
Ixodidae
Mexico
Mortality
organophosphates
Oviposition
Oviposition - physiology
oviposition inhibition
Pathogenicity
Pest Control, Biological - methods
Pesticide resistance
Pesticides
Pests
Properties
Pyrethroids
Rhipicephalus
Rhipicephalus - microbiology
Species Specificity
Ticks
Mexico
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Summary:The pathogenicity of four native strains of Bacillus thuringiensis against Rhipicephalus (Boophilus) microplus (Canestrine) (Acari: Ixodidae) was evaluated. A R. microplus strain that is resistant to organophosphates, pyrethroids, and amidines, was used in this study. Adult R. microplus females were bioassayed using the immersion test of Drummond against 60 B. thuringiensis strains. Four strains, GP123, GP138, GP130, and GP140, were found to be toxic. For the immersion test, the total protein concentration for each bacterial strain was 1.25 mg/ml. Mortality, oviposition, and egg hatch were recorded. All of the bacterial strains had significant effects compared to the controls, but no significant differences were seen between the 4 strains. It is evident that these B. thuringiensis strains have a considerable detrimental effect on the R. microplus strain that is resistant to pesticides.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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Associate Editor: Fernando Vega was editor of this paper
ISSN:1536-2442
1536-2442
DOI:10.1673/031.010.14146