The research was aimed to know the effect of the mixture of neem leaf, crab shell flour and urea to control population of root-knot nematode (Meloidogyne incognita) in tomato plant. It was executed at green house and in the Laboratory of Nematology Major of Plant pest and disease, Agriculture Faculty Sriwijaya University at September until Desember of 200 & Completely Randomized Desing was the …