Studies on the root-knot nematodes of winged bean (Psophocarpus tetragonolobus) in Papua New Guinea

T.V. Price, D.S. Linge


Root-knot of winged beans in Papua New Guinea was caused by Meloidogyne incognita and M. javanica. Field studies indicated that invasion occurred during seedling emergence and increased with growth of the plants. Optimum hatch of M. incognita occurred between 25° and 30°C and that of M. javanica occurred between 20° and 30°C. Population of at least 27 larvae per gramme of soil were shown to be desirable when screening for resistance.

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