Screening for Resistance and Management of Root-Knot Nematode, Meloidogyne incognita on Bt Cotton

Based on 1–5 root knot index, 38 Bt cotton hybrids showed either susceptible or highly susceptible reaction and two were moderately resistant. Highest (39.5%) increase in yield of Mahico 60–25 Bt hybrid over untreated check and significantly lowest final nematode population in the soil was recorded in the treatment combination of a rhizobacterium, Gluconacetobacter diazotrophicus strain 35–47 as seed treatment + carbofuran @ 1.0 kg a.i/ha as soil application followed by 29.3% in seed treatment with carbosulfan @ 3.0% w/w + soil application of carbofuran @ 1.0 kg a.i/ha.