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Bioassay assessment of metarhizium anisopliae (metchnikoff) sorokin (deuteromycota: hyphomycetes) against Oncometopia facialis (signoret) (hemiptera: cicadellidae).

Authors
  • Pria Júnior, Wolney Dalla
  • Lacava, Paulo Teixeira
  • Messias, Claudio Luiz
  • Azevedo, João Lúcio
  • Lacava, Pedro Magalhães
Type
Published Article
Journal
Brazilian Journal of Microbiology
Publisher
Elsevier
Publication Date
Jan 01, 2008
Volume
39
Issue
1
Pages
128–132
Identifiers
DOI: 10.1590/S1517-838220080001000027
PMID: 24031192
Source
Medline
Keywords
License
Unknown

Abstract

Citrus Variegated Chlorosis (CVC) is an economically important, destructive disease in Brazil and is caused by Xylella fastidiosa and transmitted by sharpshooter insects. In this study, the efficacy of the fungus Metarhizium anisopliae in controlling the sharpshooter Oncometopia facialis was studied by bioassay conditions. In the bioassay, insects were sprayed with a suspension containing 5 X 10(7) conidia mL(-1). Adults captured in the field were treated in groups of 10 in a total of 11 replications per treatment. Significant differences between the natural mortality and the mortality of insects treated with the fungus were observed 6 days after inoculations (P<0.05). These significant differences increased until 10 days after treatment. The fungus caused 87.1% mortality, with the LT50 varying from 5 to 6 days. The LC50 was 1.2 X 10(6) conidia mL(-1), varying from 7.7 X 10(5) to 2 X 10(6) conidia mL(-1). The results showed that the sharpshooter O. facialis was susceptible to the entomopathogenic action of M. anisopliae in controlled condition during bioassay.

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