Nematodofauna of potato tubers in the Republic of Moldova

Abstract

According to the multiannual researches, it was observed that, in the conditions of the Republic of Moldova, the Nematodofauna of potato tubers (Solanum tuberosum) of different varieties, collected from deposits, is specific, with the dominance of saprophytes due to the spread of bacteriosis and fungal infections. In the potato tubers, sick with dithylenchosis (phases 4, 5), the presence of 30 spec8es of nematoodes was identified, belonging to 24 genera, 14 families, 5 orders, 2 classes: 1. Class Secernentea, Orders Aphelenchida, Rhabditida and Tylenchida; 2. Class Adenophorea, Orders Dorylaimida and Plectida. Most species (19 species) are saprophytes of the Class Secernentea, Order Rhabditida with the dominance of the Superfamilies Cephaloboidea and Diplogasteroidea. According to the trophic-ecological group, the species detected in the potatoes tubers are included in all 5 groups: plant feeding, hiphal feeding, bacterial feeding, animal predation, omnivorous. In all researched varieties, both in frequency (100%) and density (thousands of individuals/gram of infested tissue) distinguished species Ditylenchus destructor Thorne 1945, Order Tylenchida, Family Anguinidae, which is also the main parasite in the culture of Solanum tuberosum in the Republic of Moldova, capable of causing dithylenhosis, as well as epiphytotics – mass infestation of potatoes in deposits