Population development of root-knot nematodes in tobacco fields in kelantan during two consecutive years

P.M. yuen and A.S. Enon

Abstract

In a two-year study of nine tobacco farms in Bachok and Pasir Puteh, Kelantan, Meloidogyne incognita and M. javanica were found infecting TAPM 36 variety tobacco. Infection of a tobacco crop could begin in the sowing bed, polybags or field. The nematode larval population reached a peak at the second or third month after field transplanting. During the fallow period after the tobacco crop, rootknot larvae were found to parasitise weeds, of which 23 species were found to be alternate hosts. Weeds tolerant to waterlogging enable the parasite to survive the annual monsoonal floods.

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