D. P. Singh ¹, S. Nagarajan ¹, L. B. Goel ¹, D. Singh ², J. Kumar ¹, D. V. Singh ³, Amerika Singh ⁴, K. D. Srivastava ³, R. Aggarwal ³, M. S. Beniwal ⁵, A. N. Tewari ⁴, K. P. Singh ⁴, A. S. Grewal ⁶

Affiliations
1 Directorate of Wheat Research (ICAR) Post Box No. 158, Karnal 132001, Haryana, IN
2 IARI RS, Karnal, IN
3 IARI, New Delhi, IN
4 GBPUAT, Pantnagar, IN
5 CCHHAU, Hisar, IN
6 PAU, Ludhiana, IN

Abstract

The application of Trichoderma viride on loose smut infected seeds (Ustilago segetum var. tritici) or in soil, reduced the smutted tillers up to 17.5 per cent. However, treatment of T. viride alone was not as effective as carboxin seed treatment in the control of loose smut. Maximum reduction was observed in dry seed treatment with antagonist as well as seed treatment plus soil application. The effect of T. viride was more prominent in the seed lot having lower level of loose smut infection. Application of T. viride along with half dose of carboxin was however. found as effective as full recommended dose of carboxin (2.5 g/kg of seed). Soaking of seeds in tap water for 24h also reduced tbe incidence of loose smut by 15.4 per cent.

Keywords

Biocontrol, Loose Smut, Trichoderma viride, Uslilago segetumvar.Tritici..

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Vivek S. Sidhartha ¹, D. V. Singh ¹, R. Aggarwal ¹

Affiliations
1 Division of Mycology and Plant Pathology, IARI, New Delhi - 110 012, IN

Abstract

Phylloplanc mycoflora isolated from four wheat varieties viz., Arjun, WL 711, Sunalika and HD 2285 showed no variation among themselves. Out of 19 fungi isolated, three pruvcd to he antagonistic to Neovossia indica (Mitra) Mundkur. In dual culture, Aspergillus Iliger v. TieghenL,Gliocladium virens Miller et al and Tricllmierma viride Pers. ex Fr. hyperparasitized and lysed the colonies of N. indica. Cell-free culture filtrate of these fungi reduced the germination of tcliospors as well as sporidia.

Keywords

Leaf Mycoflora, Interaction, Neovossia indica, Antagonists, Wheat Varieties.

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