Chemical and non-chemical control of Meloidogyne incognita Under Field Conditions

Field studies were conducted in 1998 and 1999 to investigate the effects ofair-dried milled leaves of neem (Azadirachta indica), Siam weed (Chromolaena odorata) and roots, each at 30 and 50 kgtha and carbofuran at 1.5 and 2.5 kg a.i./ha on Meloidogyne incognita infecting cowpea cv. 1T86D-715. Carbofuran-treated field had the highest grain yield (1.7 tlha), and the least root galling as well as least nematode population in soil at harvest. Populations of species of Pratylenchus, Helicotylenchus, Xiphinema and M. incognita were redued by 83.2,86.5,89.1 and 94.8% respectively. In the neem leaf-treated field, grain yield was recorded as 1.3 tlha and root gall rating was 1.4