Weed and rotation crop plants as hosts for the rice root-knot nematode, Meliodogyne graminicola (Golden and Birchfield).
In Cuttack, India, the following weeds from rice fields infested with Meloidogyne graminicola were found to be infested, bearing root galls and eggmasses: Echinochloa crusgalli, E. colona, Eleusine indica, Paspalum sanguinola, Eclipta alba, Grangea madraspatensis, Phyllanthus urinaria, Fimbristylis miliacea, Blumea sp., Vandellia sp., Jussieua repens and Andropogon sp. Galls but no eggmasses were found on Cynodon dactylon, Eragrostis plumosa, Brachiaria ramosa and Euphorbia hirta. In an investigation of possible rotation crops for use on M. graminicola-infested land, chillies (Capsicum frutescens) and tomato were infested. Of cereal crops tested, wheat and Panicum spp. were good hosts while Setaria italica and Eleusine coracana allowed only restricted development and reproduction of the nematode and their progeny was less infective to rice than that from the good hosts. The results give information of use in planning crop rotations including rice in infected fields.