Citres Nematode is

Citrus Nematode is Tylenculus.
Tylenchulus semipenetrans, also known as the citrus nematode or citrus root nematode, is a species of plant pathogenic nematodes and the causal agent of the slow decline of citrus. T. semipenetrans is found in most citrus production areas.
Their feeding strategy is semi-endoparasitic and has a very narrow host range among commonly grown crops. These nematodes are considered major plant-parasitic nematode because they can cause 10 - 30% losses reported on citrus trees.