Vol. 11, Special Issue 10 (2022)

The pot culture experiment was conducted during Rabi season in the year 2021- 2022 at Green polyhouse condition, Department of Nematology, OUAT, Bhubaneswar, Odisha, in order to study Interaction Effects of Root Knot Nematode and Rhizobium on Chlorophyll Content in Different Field Pea Cultivars. The experiment was laid out in Complete randomized design with 7 treatments i.e T₁= Nematode (1000 J₂/pot), T₂= Rhizobium T₃= Nematode + Rhizobium (same time), T₄= Nematode + Rhizobium (after 10 days of nematode inoculation), T₅= Rhizobium + Nematode (after 10 days of rhizobium inoculation), T₆= Carbofuran @ 2 kg ai/ha (0.15g/pot) a nd T₇= Untreated check. Above all combination of treatment were applied to the three germplasms named as IPFD-5-19 (AMAN), IPFD-10-12 and IPFD-1-10 (PRAKASH), which were showing Resistant (R), Moderately resistant (MR) and Susceptible (S) reaction against root knot nematode respectively. Decrease of chlorophyll content was maximum in highly susceptible variety IPFD-1-10 (chl a- 45.44%, chl b- 52.06%, Total chl- 63.66%) and that of minimum in resistant variety IPF-5-19 (chl a- 23.48%, chl b- 37.23%, total chl- 41.94%) in nematode inoculated plant over check. There is highest increase in chlorophyll content in rhizobium inoculated plant (T₂) and then application of carbofuran (T₆) over the check (T₇).