Management of Okra Powdery Mildew Using Ampelomyces quisqualis
Jump To References Section
Authors
-
Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu ,IN
C. Gopalakrishnan -
Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu ,INV. Valluvaparidasan
DOI:
https://doi.org/10.18311/jbc/2009/3684Keywords:
Ampelomyces quisqualis, Bio-Dewcon, Foliar Spray, Okra and Powdery Mildew.Abstract
The fungus Ampelomyces quisqualis is a naturally occurring hyperparasite of powdery mildews. Stanes Bio-Dewcon is a talc- based biological fungicide that contains the spores and mycelial fragments (1 x 108 CFUs g-1) of A. quisqualis. Bio-Dewcon at three different concentrations, viz., 2.0, 2.5 and 3.0kg ha-1 significantly reduced the okra powdery mildew incidence. The product was applied to plants as preventive spray at 30 and 45 days after sowing. Among the three doses tested, 3.0kg ha-1 was found to be on par with wettable sulphur (0.4%). Even though both Bio-Dewcon and wettable sulphur were found to be equally effective in controlling powdery mildew, Bio-Dewcon may be preferred due to its non-residual and odourless properties, especially in vegetables.
Downloads
Download data is not yet available.
Metrics
Metrics Loading ...
References
Falk, S. P., Gadoury, D. M., Cortesi, P., Pearson, R. C. and Seem, R. C. 1995a. Parasitism of Uncinula necator cleistothecia by the mycoparasite Ampelomyces quisqualis. Phytopathology, 85: 794–800.
Falk, S. P., Gadoury, D. M., Pearson, R. C. and Seem. R. C. 1995b. Partial control of grape powdery mildew by the mycoparasite Ampelomyces quisqualis. Plant Disease, 79: 483–490.
Paulitz, T. C. 2001. Biological control in green house systems. Annual Review of Phytopathology, 39: 103–133.
Singh, N. B., Sharma, H. K. and Srivastava, K. J. 1998. Chemical control of powdery mildew in okra seed crop. National horticultural Research and Development Foundation Newsletter, 18: 1–4.
