Extracts of Chinese herbal medicines from plants representing 13 families were tested for their ability to suppress plant-parasitic nematodes. Effective concentration (EC₅₀ and EC₉₀) levels for 18 of the extracts were determined in laboratory assays with Meloidogyne javanica juveniles and all stages of Pratylenchus vulnus. Efficacy of 17 extracts was tested against M. javanica in soil. Generall...

A developmental expression profile of the Meloidodgyne javanica esophageal gland gene chorismate mutase-1 (Mj-cm-1) could suggest when in the lifecycle of the nematode the Mj-cm-1 product is functional. This study used real-time quantitative RT-PCR to examine the variation in Mj-cm-1 transcript levels over six timepoints in the nematode lifecycle: egg, infective second-stage juveniles (Inf-J2),...

Plant-parasitic nematodes form one of the largest sources of biotic stress imposed on plants, and are very difficult to control; among them are the obligate parasites, the sedentary root-knot nematodes (RKNs)-Meloidogyne spp.-which are extremely polyphagous and exploit a very wide range of hosts. Endophytic fungi are organisms that spend most of their life cycle within plant tissue without caus...

Dentre os biomas brasileiros, o Cerrado é segundo em extensão territorial e diversidade de espécies vegetais animais. A biodiversidade do tem sido estudada no que tange a sua flora fauna, carecendo dados microorganismos representantes da microfauna, exemplo dos nematoides galhas radiculares. Meloidogyne spp. são endoparasitas sedentários plantas. presença solo áreas com vegetação nativa cerrado...

In an investigation on nematode dist r ibut ion in a vineyard (1), difficulty arose in determining tile Meloidogyne spp. present. Chromosomal analysis indicated the presence of at least six populations, representing four species (2). T h e objective of this study was to determine any differences among the Meloidogyne populat ions in their distr ibution in the soil and between vines. T o m a t o...

Several economically important crops are susceptible to root-knot nematode (RKNs). Meloidogyne incognita and M. javanica the two most reported species from RKN complex, causing damage several worldwide. The successful outcome of Meloidogyne-plant interaction is associated with molecular factors secreted by suppress plant's immune response promote parasitism. In contrast, plant defense against i...