NEMATODE THREATS TO RICE IN LIBERIA
AbstractThe relationship between rice and seven plant parasitic nematodes in Liberia are discussed. Xiphinema ifacolum is a widespread species and must be regarded as a major pesto Mesocriconema curvatum and M. onoense cause damage at high population densities and in wet and clay soils. Hemicycliophora typica is responsible far the destruction of feeder roots. Helicotylenchus dihystera is cosmopolitan and when numerous may affect yields to an economic extent. Heterodera sacchari could be a serious pathogen but has a very restricted distribution. Finally, Meloidogyne incognita is widespread but it was rarely found in association with rice.