Plant Parasitic Nematodes in Vineyards of Tripoli and Zawia Regions

Abstract

A survey of 42 vineyards in Tripoli and Zawia regions indicated the occurrence of seventeen genera of nematodes. Some of the nematodes of major economic importance such as Meloidogyne spp. Praiylenchus spp. were widely distributed. Their infestation was low to moderate in the plantations surveyed. The genera Tylenchorhynchus, Ditylenchus, Tylenchus. Rotylenchus and Macroposilionia were also commonly found associated with the plants. The remaining nine genera were rarely encountered.

Meloidogyne spp. were more prevalent in the irrigated vineyards than in the rainfed. Other plant parasitic nematodes showed no significant variation in their distribution in the irrigated or non irrigated grapevines. Young plants of 5-10 years of age were more infested with root-knot nematodes than the old ones. The heavy infections of root-knot nematodes caused yellowing of leaves twig dieback poor growth and sometimes death of large number of young plants.