In order to determine the chemotaxis of Meloidogyne incognita,the chemotactic responses of the second stage juveniles of M.incognita to 37 inorganic salts and 11 organic salts were investigated on agarose plates with different salt gradients.M.incognita was repellent to chloride and SCN-.M.incognita was repellent to nitrates including Ba(NO3)2,NH4NO3,Mn(NO3)2,and hydrogen-phosphate salts including KH2PO4,K2HPO4,and carbonate including Na2CO3,K2CO3,(NH4)2CO3,KHCO3,and hydroxyl salts including KOH and NaOH,an...