Abstract
During a fifteen-year period of work carried out by the Test facility for the farm acquisition to be used to conduct efficacy trials against nematodes, a survey was carried out on nematological problems occurring in the Campania Region. The investigations has shown that the genus Meloidogyne spp., in particular the species M. incognita, is the most widespread and harmful trophic group. These nematodes are found in particular on horticultural plants in the sandy soils of the coastal areas and especially under protected conditions. Infestations of the cyst nematodes Globodera rostochiensis and G. pallida on potato in the neighbouring Caserta and Neapolitan areas, H. goettingiana on leguminous plants, especially peas, and H. daverti on carnation in the Vesuvian foothills are also common. In the Nocerino-Sarnese countryside, infestations by the stem and bulb nematode, Ditylenchus dipsaci, on onions are still severe. On fruit trees are common Mesocriconema xenoplax on actinidia, Meloidogyne incognita and M. hapla on peach trees and Tylenchulus semipenetrans on citrus fruits. Among the virus transmitting nematodes, Xiphinema diversicaudatum is very harmful to peach trees in Terra di Lavoro, in the Carinola (Caserta) area, and X. index to grapevines in the Benevento and Avellino areas. Key Words: phytoparasitic nematodes, crops, distribution, damage.
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