Vol. 12, Issue 3 (2023)

Author(s):
Pramodkumar, Shinde VS, Latake SB and Sali VM

Abstract:
Chickpea production is limited by many diseases and insect-pests. Major losses in chickpea yield are due to wilt (Fusarium oxysporum f. sp. ciceri), dry root rot (Rhizoctonia bataticola) and collar rot (Sclerotium rolfsii) and these altogether are designated as ‘Chickpea wilt complex’. Fungicidal property of Chitosan has been reported by many workers. Present study was carried out to test the efficacy of oligo chitosan against the major soil borne pathogens of chickpea. Oligo-chitosan alone @ 50, 75, 100, 125 and 150 ppm and in combination with Trichoderma viride along with the combi fungicide carbendazim 12% + mancozeb 63% @ 0.1% were evaluated by in vitro by poison food technique, similarly these were evaluated as seed treatment under glass house conditions against the three pathogens. The fungicidal treatment carbendazim 12% + mancozeb 63% @ 0.1% was found significantly superior to all the treatments to inhibit the mycelial growth of pathogen under in vitro conditions with minimum disease incidence in pot culture. It was followed by the treatment oligo-choitosan @ 100 ppm + T. viride (90.81, 91.70 and 93.33% inhibition in F. oxysporum f. sp. ciceri, R. bataticola and S. rolfsii, respectively) in vitro with minimum disease incidence of wilt (13.33%), dry root rot (16.67%) and color rot (16.67%) under glasshouse conditions in pot. Thus oligo-chitosan in combination with T. viride was found most effective in controlling all the three soil borne pathogens of chickpea both under in vitro and glasshouse condition.