M. B. Shivanna ¹, H. S. Shetty ¹

Affiliations
1 Department of Studies in Applied Botany, University of Mysore, Manasagangotri, Mysore-570 006, IN

Abstract

Among tbe three biocontrol agents tested, Trichoderma harzianum isolate-I and T. viride were found to be highly effective in reducing the seed-borne fungi of c1usterbean on seed treatement. Their combination with thiram was found to be the next in the order of effectiveness. These biocontrol agents and their combination not only increased the seed germinability significantly but also the seedling vigour.

Keywords

Trichoderma harzianum, T. viride, Thiram, Integrated Biocontrol, Clusterbean.

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S. Shishupala ¹, H. S. Shetty ¹

Affiliations
1 Department of Studies in Applied Botany, University of Mysore, Manasagangotri, Mysore-570 006, IN

Abstract

Four fungi viz., Trichoderma harzianum, T. viride, Aspergillus niger, Chaetomium globosum and one bacterium Bacillus subtilis were evaluated for their efficacy in reducing downy mildew incidence in pearl millet due to oospore infection under green house conditions. All the antagonists applied to the soil along with wheat bran decreased the downy mildew incidence and increased the plant stand and growth of pearl millet seedlings. The possibility of using these antagonists to reduce the downy mildew disease due to oospore inoculum has been discussed.

Keywords

Pearl Millet, Downy Mildew, Oospore Infection, Antagonists, Soil-Amendment, Trichoderma spp., Bacillus subtilis.

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S. Mahadevamurthy ¹, H. S. Prakash ¹, H. S. Shetty ¹

Affiliations
1 Department of Studies in Applied Botany, University of Mysore, Manasagangothri, Mysore 570 006, IN

Abstract

The germination of sclerotia of Claviceps fusiformis Loveless was significantly inhibited when placed in soil amended with Aspergillus niger, Fusarium oxysporum, Trichoderma harzianum, T. viride and Bacillus subtilis. The antagonists did not affect the germination or pearl millet seeds. The sclerotia colonised by the antagonists were found disintegrated and fragments of such sclerotia showed the colonies of the respective antagonists on incubation.

Keywords

Pearl Millet, Claviceps fusiformis, Sclerotial Germination, Antagonists.

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