COMPATIBILITY STUDIES ON Trichoderma sp. WITH AGROCHEMICALS, BOTANICALS AND OTHER BIOAGENTS USED IN TOMATO (Solanum lycopersicum L.) AND CABBAGE (Brassica oleracea var. capitata L.)
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Date
2017-08
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K.R.C. COLLEGE OF HORTICULTURE COLLEGE OF ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
Compatibility Study was conducted with commonly used agrochemicals, botanicals and other bio agents against the T. harzianum and T. viride being used as a biocontrol agents against soil borne diseases of tomato and cabbage under in vitro and in vivo conditions. Results indicated that among systemic fungicides, Azoxystrobin was found highly compatible with T. harzianum and T. viride at all the three tested concentrations (0.05, 0.10 and 0.15 %) followed by Metalaxyl. The highest inhibition was recorded in Carbendazim. With respect to non-systemic fungicides, Mancozeb recorded least inhibitory effect on Trichoderma sp. and incompatibility was found with Copper Oxy Chloride and Chlorothalonil. Among the antibiotics, Streptomycin sulphate was highly compatible with T. viride and T. harzianum at all the tested (0.04, 0.05 and 0.06%) concentrations. Among systemic insecticides, Fipronil (@ 0.15, 0.2 and 0.25 %) was found highly compatible with T. viride and T. harzianum followed by Imidachloprid. With respect to non-systemic insecticides, maximum inhibition of Trichoderma sp. was observed with the Quinalphos followed by Chloropyriphos at 0.15, 0.20, 0.25 per cent concentrations. Compatibility of herbicides evaluated against Trichoderma sp. revealed that Glyphosate was found to be highly compatible (@ 0.05, 0.1 & 0.15 % Conc.). Maximum inhibition was recorded with Alachlor followed by 2, 4-D, Pendimethalin and Oxyfluorofene.
Among the Botanicals, Ocimum, Neem and Adathoda leaf extracts at 5.0, 7.5 and 10.0 per cent were compatible with Trichoderma sp. while Pongamia and Garlic extracts were moderately compatible. Among bio agents, Metarrhizium anisopliae was found highly compatible followed by Paecilomyces lilacinus and Lecaenicilium lecanii whereas Pseudomonas fluorescens and Bacillus substilis were found moderately compatible.
Further compatible combinations were evaluated to know the survival of population of Trichoderma in soil media cropped with tomato and cabbage. No significant difference in population of Trichoderma was noticed between treatments and control. Significant increase in population was noticed with neem leaf extract. Thus the compatible combinations at their recommended dosage can be recommended for integrated management of soil borne pathogens of these crops.
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TH611
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