Degradation and residual effects of endosulfan on soil chemical properties and root- knot nematode Meloidogyne incognita populations in cocoa plantation in Ibadan, Nigeria

The Cocoa Research Institute of Nigeria (CRIN) was established in Ibadan, Oyo State on 1st December, 1964 as a successor autonomous rese arch organisation to the Nigerian Substation of the defunct West African Cocoa Research Institute (WACRI)