Evaluation of Pseudomonas fluorescens Strains, Fungicides and Non-conventional Chemicals Against Botyrotinia ricini Causing Grey Mold Disease in Castor

Authors

  • S. Ameer Basha Dept. of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, Telangana (500 030), India
  • V. Ramya Dept. of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, Telangana (500 030), India
  • A. Sajeli Begum Dept. of Pharmacy, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Shameerpet, Hyderabad, Telangana (500 078), India
  • G. Raghavendra Siddhartha Degree College for women, Dilsukh Nagar, Hyderabad, Telangana (500 060), India
  • A. V. Ramanjaneyulu Maize Research Centre, Agricultural Research Institute, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, Telangana (500 030), India
  • M. V. Nagesh Kumar Dept. of Plant Pathology, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad, Telangana (500 030), India

Keywords:

Botrytonia ricini, biological control, castor, fungicides, Pseudomonas fluorescens

Abstract

A study was made to evaluate the efficacy of Pseudomonas fluorescens strains, fungicides and non-conventional chemicals against Botryotinia ricini, causing grey mold disease in castor, under in vitro conditions. Among the 40 strains isolated from rhizosphere soil samples of different crops across the State of Telangana, India, only eight strains inhibited the growth of B. ricini under dual culture technique, of which strains Pf 21 (90.56%), Pf  23 (88.89%), Pf  34 (86.11%) and Pf 36 (84.17%) were the most effective. Among the seven chemicals (four fungicides and three non-conventional chemicals) tested for their efficacy, carbendazim followed by propiconazole had significant antagonistic effect against B. ricini. Exposure of healthy castor capsules to B. ricini and P. fluorescens for different time periods revealed that strains Pf 34 and Pf 36 were effective in completely inhibiting the growth of B. ricini and hence these two strains have been identified as effective biocontrol agents, on par with carbendazim, which offer scope for sustainable and integrated disease management of grey mold disease in castor.

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Published

2021-09-07

How to Cite

1.
Basha SA, Ramya V, Begum AS, Raghavendra G, Ramanjaneyulu AV, Nagesh Kumar MV. Evaluation of Pseudomonas fluorescens Strains, Fungicides and Non-conventional Chemicals Against Botyrotinia ricini Causing Grey Mold Disease in Castor. IJBSM [Internet]. 2021 Sep. 7 [cited 2025 Sep. 8];12(Aug, 4):339-47. Available from: https://ojs.pphouse.org/index.php/IJBSM/article/view/4114

Issue

Vol. 12 No. Aug, 4 (2021)

Section

Articles

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