Colonization of Gliocladium virens on Biologically Treated Chickpea Seeds for Biocontrol of Chickpea Wilt Complex

Tewari, A. K. and Mukhopadhyay, A. N. and Aggarwal, R. (2003) Colonization of Gliocladium virens on Biologically Treated Chickpea Seeds for Biocontrol of Chickpea Wilt Complex. Acta Phytopathologica et Entomologica Hungarica, 38 (1-2). pp. 79-85. ISSN 0238-1249

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Abstract

Chickpea (Cicer arietinum) seeds treated with powdered preparation of Gliocladium virens (Gv) alone @ 3 g/kg seed or in combination with vitavax (0.1%) showed colonization of G. virens on seed coat, collar region, plumule and radicle. Microscopic examination revealed that colonization of seed with mycelia and spores of antagonist started 24 h after incubation. Major portion of the seedling was covered with in 48 hrs. Population dynamics of G. virens monitored at different time inter­vals in spermosphere, rhizosphere and non-rhizosphere region in pathogen infested and non-infested soil using Trichoderma Selective Medium showed that population of G. virens increased initially up to 30 days and then gradually declined. The highest population was observed in spermosphere (7 x 105/g) followed by rhizosphere (6.3 x 104/g), when seeds treated with Gv + vitavax were sown in pathogen infested soil.

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