Document Detail

Exudate from sporulating cultures of Hirsutella thompsonii inhibit oviposition by the two-spotted spider mite Tetranychus urticae.
MedLine Citation:
PMID:  14635809     Owner:  NLM     Status:  MEDLINE    
The acaricidal mycopathogen Hirsutella thompsonii has been found to secrete metabolites that are active against female Tetranychus urticae. Specifically, the rose-colored exudate produced on sporulating cultures of Mexican HtM120I strain sterilized female spider mites in a dose-dependent fashion. Topical application of the exudate resulted in a 100% reduction in mite fecundity over the initial six days of experimentation. Depending upon the exudate dosage, mites partially recovered within 3 and 6 d post-treatment and produced a limited number of eggs. The spider mite active HtM120I exudate contained less detectable HtA toxin than the HtM120I broth filtrate, and it was innocuous when injected into the greater wax moth Galleria mellonella L. larvae. Broth filtrates of HtM120I cultures, although toxic to assayed G. mellonella larvae, did not inhibit mite oviposition to the degree or duration of the exudate preparations. These findings suggest that the factor responsible for suppressing oviposition in female spider mites is linked to the sporulation process and is distinct from the well-characterized HtA produced by vegetative cells.
José Luis Rosas-Acevedo; Drion G Boucias; Roberto Lezama; Kelly Sims; Alfonso Pescador
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Experimental & applied acarology     Volume:  29     ISSN:  0168-8162     ISO Abbreviation:  Exp. Appl. Acarol.     Publication Date:  2003  
Date Detail:
Created Date:  2003-11-25     Completed Date:  2004-01-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8507436     Medline TA:  Exp Appl Acarol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  213-25     Citation Subset:  IM    
Centro de Desarrollo Regional, Unidad de Estudios de Posgrado e Investigación de Acapulco, Universidad Autónoma de Guerrero, Apdo. Postal 612, 39301 Acapulco, Gro., Mexico.
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MeSH Terms
Cytotoxins / metabolism
Exudates and Transudates / metabolism
Fungal Proteins / metabolism
Hypocreales / metabolism*
Mite Infestations / prevention & control*
Pest Control, Biological
Spores, Fungal / metabolism
Tetranychidae / growth & development,  microbiology*
Reg. No./Substance:
0/Cytotoxins; 0/Fungal Proteins; 0/Hirsutellin A protein, Hirsutella thompsonii

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