Open Access
Subscription Access
Ovicidal action of different fungal pathogens against two spotted spider mite, Tetranychus urticae (Koch) under laboratory conditions
Bioassay studies were performed with ten different fungal isolates of six species against two spotted spider mite, Tetranychus urticae. Among different formulations, Hirsutella thompsonii caused significantly higher mortalities of 61.1, 35.8 and 22.1 per cent at conidial concentrations of 971, 196 and 36 conidia mm-2, respectively. At a conidial concentration of 1457 conidia mm-2, Beauveria bassiana isolate Bb101 caused significantly higher mortality rate of 46.9 per cent followed by B. bassiana isolate B2 (36.1%) and Cladosporium cladosporioides isolate Cc101 (32.1%). Based on the probit estimates, H. thompsonii was found to exert high ovicidal activity with the lowest LC50 of 674 conidia mm2 against T. urticae eggs.
Keywords
- Acevedo RJL, Boucia DG, Lezama R, Sims K and Pescador A. 2003. Exudate from sporulating cultures of Hirsutella thompsonii inhibit oviposition by the two spotted spider mite Tetranychus urticae. Exp. Appl. Acarol., 29:213–225.
- Hanchinal SG, Manjunatha M. 2000. Metarhizium anisopliae (Metsch.) Sor. on Tetranychus neocaledonicus Andre and its predator Amblyseius ovalis Evans. Karnataka J. Agric. Sci., 13(2): 454-456.
- Irigaray FJS, Marco-Mancebón V and Pérez-Moreno I. 2003. The entomopathogenic fungus Beauveria bassiana and its compatibility with triflumuron: effect on the two-spotted spider mite, Tetranychus urticae. Biol. Control, 26 (2): 168-173.
- Kumar PS and Singh L. 2007. Acarotoxicity of Hirsutella thompsonii Fisher exudate with reference to the two-spotted spider mite, Tetranychus urticae Koch. J. Biol. Control, 21: 197-202.
- Mazet, I. and Vey A. 1995. Hirsutellin A, toxic protein produced in vitro by Hirsutella thompsonii. Microbiology, 141: 1343-1348.
- Shi, WB and Feng MG. 2004a. Ovicidal activity of two fungal pathogens (Hyphomycetes) against Tetranychus cinnabarinus (Acari: Tetranychidae). Chin. Sci. Bull., 49(3): 263-267.
- Shi, WB and Feng MG 2004b. Lethal effect of Beauveria bassiana, Metarhizium anisopliae, and Paecilomyces fumosoroseus on the eggs of Tetranychus cinnabarinus (Acari: Tetranychidae) with a description of a mite egg bioassay system. Biol. Control, 30: 165–173.
- Srinivasa, N and Sugeetha J. 1999. Bio effectiveness of certain botanicals and synthetic pesticides against okra spider mite Tetranychus macfarlanei. J. Acarol., 15: 1-5.
Abstract Views: 252
PDF Views: 161