Preliminary investigations of nematodes associated with rice in Guinea, Benin and Togo.
Seven rice fields were sampled in Guinea, 15 in Benin and 5 in Togo for plant parasitic nematodes. Twenty one genera of plant parasitic nematodes were recovered from a range of environments including upland, lowland, hydromorphic, rainfed and irrigated lowland and mangrove swamp. High populations of Pratylenchus zeae and Heterodera sacchari were consistently found associated with poor crop growth. Over 200 P. zeae g-1 fresh roots were recovered from the most affected plants. Pratylenchus brachyurus, Helicotylenchus sp., Aphelenchoides besseyi, Hemicriconemoides snoecki and Hirschmanniella oryzae were recovered from rice samples from Guinea. Hoplolaimus clarissimus and Peltamigratus nigeriensis were found associated with poor rice growth in Togo.