Assessment of infectivity against root knot nematode, Meloidyne incognita and lesion nematode, Pratylenchus zeae in sugarcane genotypes

Abstract

A greenhouse experiment was conducted to screen against root knot nematode, Meloidogyne incognita with chip bud seedling 27 numbers of clones. Among them 19 clones were found to be moderately resistant, two resistance and six clones were susceptible. Another greenhouse experiment was conducted to screen against lesion nematode, Pratylenchus zeae using chip bud seedling same 27 clones. Among them 20 clones were found to be tolerant, one clone was moderately resistant and six clones were found to be susceptible. A separate field experiment was conducted to screen twelve clones against root knot nematode, Meloidogyne incognita and lesion nematode, Pratylenchus zeae. Among them seven clones were found to be moderately resistant and three clones were susceptible to root knot nematode. The check varieties, CoC 24 and CoC25 were found to be resistant. For lesion nematode eight clones were found to be tolerant and three clones were found to be susceptible. The check variety CoC 25 were found to be moderately resistant. A field experiment was conducted to screening of 33 sugarcane varieties/ clones against root knot nematode, Meloidogyne incognita. Among them seventeen clones were found to be moderately resistant, fourteen clones were susceptible. The two varieties (CoC 24 and CoC 25) were found to be resistant. A field experiment was conducted to screening of 33 sugarcane varieties/clones against lesion nematode, Pratylenchus zeae. Among them thirty clones were found to be tolerant and three clones were found to be moderately resistant C 15157, C 15499 and CoC 25.