Vol. 11, Issue 9 (2022)

Author(s):
Mohammed Faraaz Ahmed and Poonam Pandurang Shete

Abstract:
Mungbean is one of the most important pulse crops cultivated in India. In India, it is the third most important legume crop after chickpea and pigeon pea. It is cultivated in summer and kharif season in North and South India. Mungbean is a major source of high protein. As a leguminous crop it can fix- atmospheric nitrogen through symbiotic nitrogen fixation. Mungbean is being affected by various fungal, bacterial, and viral diseases but, dry root rot caused by Macrophomina phaseolina (Tassi) Goid. is considered as the extremely destructive disease in all the mungbean cultivating regions of the country. Macrophomina phaseolina is a soil-borne pathogen causes serious disease in several crops in India, diminishing crop yields. The present study on various aspects of the disease dry root rot caused by Macrophomina phaseolina in Mungbean was carried out for developing an effective and economical management strategies for its control. The seven culture medium tested, Potato dextrose agar was found to be most excellent medium for the growth of Macrophomina phaseolina. Maximum mycelium growth of dry root rot fungus Macrophomina phaseolina was recorded at temperature 30 ^oC, and PH 6.5 independently. Three fungal biocontrol agents studied under invitro, Trichoderma virens was observed highly effective in inhibiting the mycelial growth of Macrophomina phaseolina with minimum mycelial growth (36.8 mm) and maximum growth inhibition (53.96%) followed by Trichoderma harzianum. Three different fungicides were evaluated under invitro condition, Carbendazim 12% + Mancozeb 63% WP (SAAF) was observed highly effective in inhibiting the mycelial growth of Macrophomina phaseolina and showed complete (100%) mycelial growth inhibition at 250 and 500ppm concentrations, respectively. In field conditions, Treatment (T₂) Trichoderma harzianum was found effective in managing the disease incidence followed by treatment (T₄) Carbendazim 12% + Mancozeb 63% WP (SAAF) at 30 DAS, 45 DAS and 60 DAS, respectively.