Study on pathogenic interaction of root knot nematode, Meloidogyne incognita (Kofoid and White) Chit.] and white rot causing fungus, Sclerotinia sclerotiorum [Sclerotinia sclerotiorum (Lib.) de Bary] in French bean
Ananya Dutta, Aparajita Borah, Bornali Mahanta and Pranab Dutta
Combine effect of root knot nematode, Meloidogyne incognita and soil borne plant pathogen like Sclerotinia sclerotirum with synergistic effect can cause severe crop of many diseases. Therefore, a study on interaction of Meloidogyne incognita and Sclerotinia sclerotiorum on French bean was conducted and the results indicated that the dual inoculation of nematode and fungal pathogen significantly decreased plant growth parameters over the single inoculation of S. sclerotiorum @ 0.2% W/W and M. incognita @ 1000 J2/kg of soil. The treatment with M. incognita @ 1000 J2/kg of soil and S. sclerotiorum @ 0.2 % W/W simultaneous inoculation was statistically superior in decreasing the plant growth parameters of French bean. However, the number of galls, egg masses and final nematode population in soil were found maximum in single inoculation treatment than dual inoculation treatments. The highest number of galls, eggmasses and nematode population were observed in the treatment with M. incognita @ 1000 J2/kg of soil. The maximum disease incidence was recorded in the treatment with M. incognita @ 1000 J2/kg soil + S. sclerotiorum @ 0.2% w/w after 15 days inoculation.