Effectiveness of Beauveria bassiana sensu lato strains for biological control against Rhipicephalus ( Boophilus ) microplus (Acari: Ixodidae) in China

Abstract Owing to the need to combat the spread of acaricide-resistant ticks, the development of long-term biological control has become a hot topic for tick control. In this study, we investigated the pathogenicity of three Beauveria bassiana isolates on the engorged female Rhipicephalus ( Boophilu...

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Bibliographic Details
Published in:Parasitology international 2013-10, Vol.62 (5), p.412-415
Main Authors: Sun, Ming, Ren, Qiaoyun, Guan, Guiquan, Li, Yufeng, Han, Xueqing, Ma, Chao, Yin, Hong, Luo, Jianxun
Format: Article
Language:English
Subjects:
Acari
Animals
Beauveria - physiology
Beauveria bassiana
Biological control
Boophilus microplus
Cattle
China
conidia
entomopathogenic fungi
Female
females
Gastroenterology and Hepatology
Host-Pathogen Interactions
Infectious Disease
Ixodidae
Ixodidae - microbiology
Male
oviposition
parasitology
pathogenicity
Pest Control, Biological - methods
proteinases
Rhipicephalus
Rhipicephalus (Boophilus) microplus
screening
tick control
Tick Control - methods
ticks
virulent strains
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Summary:Abstract Owing to the need to combat the spread of acaricide-resistant ticks, the development of long-term biological control has become a hot topic for tick control. In this study, we investigated the pathogenicity of three Beauveria bassiana isolates on the engorged female Rhipicephalus ( Boophilus ) microplus ticks using different conidial concentrations. The results showed that B. bassiana B.bAT17 was highly pathogenic against engorged R. ( B. ) microplus females, resulting in lethal time (LT50 and LT90 ) of 7.14 and 9.33 days at a concentration of 109 conidia/ml. R. ( B. ) microplus females treated with B. bassiana B.bAT17 significantly reduced the amount of ovipositioning; and most ticks died before they could begin to oviposit. Proteases and chitinases were analyzed in order to establish a screening method for identification of high virulent strains. This study has confirmed the significant pathogenic effect of entomopathogenic fungi against engorged R. ( B. ) microplus females in China, and further studies on the efficiency of the fungus against ticks in the field are required.
ISSN:1383-5769
1873-0329
DOI:10.1016/j.parint.2013.04.008