Nematode population per root of plants as second stage J2 in soil, developmental stages in root Egg-laying females, root gall index and rate of reproduction (pf/pi) for root-knot nematode M. javanica.

Pf= (no. Egg-masses per root × no. Eggs per Egg – masses) + (Development stage/ root) + (Juveniles in soil) + (Adult females/ root). Nematode build –up = Pf/ Pi