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K. Jayashree ¹, V. Shanmugam ¹, T. Raguchander ¹, A. Ramanathan ¹, R. Samiyappan ¹

Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University Coimbatore 641 003, Tamil Nadu, IN

Abstract

Pseudomonas fluorescens strain Pfl, effectively inhibited the mycelial growth of Macrophomina phaseolina, the pathogen causing dry ischolar_main-rot in blackgram and sesame. Application of Pf1 as seed treatment (10g / kg seed) followed by soil application (2.5 kg / ha) against ischolar_main rot effectively supported higher plant growth, better native Rhizobium nodulation and grain yield. Sclerotial number and ischolar_main rot incidence were also greatly reduced. The rhizosphere soil recorded a higher number of Pf I population.

Keywords

Biocontrol, Macrophomina phaseolina, Pseudomonas fluorescens. Root- Rot, Seed Treatment, Soil Application.

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T. Raguchander ¹, K. Jayashree ¹, R. Samiyappan ¹

Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN

Abstract

Among the eight antagonistic microorganisms tested for their efficacy in reducing Fusarium oxyporum f. sp. cubense, Trichoderma viride and Pseudomonas fluorescens were equaly effective under laboratory conditions. The field trails conducted during rabi 1991 and kharif 1992 revealed that dipping of suckers in the suspension of P. fluorescens (10⁶ CFU/ml) or T. viride (10⁶ CFU/ml) along with the application of 500g wheat bran:saw dust inoculum (1:3) of the respective biocontrol agent three months after planting, effectively reduced the Fusarium wilt incidence and produced the highest yield.

Keywords

Biocontrol, Fusarium Wilt of Banana, Fusarium oxysporum f. sp. cubense, Pseudomonas fluorescens, Trichoderma viride.

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