Management of root rot and damping off complex in French bean by biocontrol agents

Authors

  • SUNIL C. DUBEY*, ARADHIKA TRIPATHI RAKESH TAK and S. INDIRA DEVI

Abstract

French bean (Phaseolus vulgaris) is one of the important food legume crops used as green vegetable and pulse in different parts of India. Among the diseases, root rot (Rhizoctonia solani) and damping off (Pythium ultimum) complex are considered an important factor for low productivity of the crop. The experiments were conducted during 2013 and 2014 at IARI, New Delhi to evaluate the performance of different seed dressing and soil application formulations of Trichoderma species and talc based formulation of Pseudomonas fluorescens (IBSD-P137) against root rot and damping off complex in French bean. The seeds treated with seed dressing formulations of Trichoderma and Pseudomonas alone and in combinations increased the seed germination, root and shoot length, plant dry weight and pod yield and decreased the disease incidence. The seeds treated with Pusa 5 SD (T. harzianum-IARI P4) in combination with P. fluorescens gave the highest seed germination, shoot and root length, dry plant weight and pod yield along with the lowest disease incidence followed by Pusa 5 SD (T. harzianum-IARI P4) alone and Pusa 5SD (T. viride; IBSD T-20) in combination with IBSD isolate of P. fluorescens. Seed germination, root length and disease incidence in these treatments did not differ significantly. Soil application of Pusa bio-pellets of T. harzianum (IARI P4) and T. viride (IBSD T-20) also enhanced the seed germination, shoot and root length, dry plant weight and pod yield and reduced disease incidence. Thus, the root rot and damping off in French bean could be managed by soil application and seed treatment with bio-formulations of T. harzianum alone and in combination with P. fluorescens. 

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Published

2017-07-24

Issue

Vol. 70 No. 3 (2017): Indian Phytopathology

Section

Short Communications

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How to Cite

RAKESH TAK and S. INDIRA DEVI, S. C. D. A. T. (2017). Management of root rot and damping off complex in French bean by biocontrol agents. Indian Phytopathology, 70(3), 388-390. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/72500