There are many plant-parasitic species in the root-knot nematode genus (Meloidogyne) that attack coffee such as M. incognita, M. arenaria, M. exigua, M. javanica and M. coffeicola.
Study has already shown interspecific variability[1][2] coffee, in which show how this species can be adapting to new hosts and environments.
Meloidogyne exigua females are small with medium stylet (12–14 μm) and strong basal knobs.
[4] Due to difficulties to identify Meloidogyne species just by perineal pattern, other reliable techniques were developed, such as Isoenzyme characterizations.
Oliveira[5] reported difficulties to use perineal pattern and isoenzymes helped to confirm species without mistakes.
[4] Attracted by exudates released by the coffee roots, J2 nematode (migratory stage) moves toward to food source.
Some juveniles may become males when the nematode population is high (competition), environmental condition are not favorable, or the plant is resistant.
Reduction of root system is observed, mostly because nematodes feed closer to xylem and phloem, where water and nutrients are transported into the plant.
Thus, new cultural methods started to be applied such as irrigation control, remove diseased plants, spacing rows and others not as common.
which will provide nutrients to the other variety on the top (scion) such Mundo Novo, that will be the one with flower and coffee fruit production.