Gokulapalan, CBhadra Sree, SKAU2019-06-132019-06-132007172715http://krishikosh.egranth.ac.in/handle/1/5810108404PGThe study “Ecofriendly management of collar rot and web blight of cowpea was conducted at the Department of Plant Pathology, College of Agriculture, Vellayani during 2004-2007. Different plant oils, oil cakes, indigenous materials like turmeric power – baking soda and rice husk ash and biocontrol agents like Trichoderma harzianum and Pseudomonas fluorescens were used in the study to manage R. solani causing the disease. Among the seven plant oils tested odal and pongamia oil emerged as the most potential ones. Of the four oil cakes gingelly and coconut cakes were identified as the best treatments. The different combinations of turmeric powder – baking soda and rice husk ash did not inhibit the growth of R. solani. Pot culture experiments were conducted to assess the efficacy of plant oils, oil cakes, biocontrol agents and indigenous materials in enhancing the growth of cowpea. Both the plant oils used in the study were successful in managing the disease. Of the three oil cakes used in the study gingelly cake exhibited best performance in disease management and growth enhancement. Of the indigenous materials used 10:1 combination of turmeric powder – baking soda and 1000gm-2 concentration of RHA were found to be excellent in enhancing growth and disease suppression. Biocontrol agents T. harzianum and P-22 culture of P. fluorescens were found to be superior in disease suppression and growth enhancement. Changes in levels of total phenols, proteins, carbohydrates and activities of defense related enzymes like PO, PPO and PAL due to above treatments were estimated. The treatment 10:1 ratio of turmeric powder – baking soda recorded highest protein and PO content. Soil application of oil cakes gave increased activity of PAL and carbohydrate.ennullThesis