TESTAREA SUSCEPTIBILITĂŢII UNOR SOIURI DE CARTOFI CĂTRE SPECIILE DE NEMATODE DITYLENCHUS DESTRUCTOR ȘI D. DIPSACI

Maria MELNIC, Dumitru ERHAN, Ştefan RUSU Institutul de Zoologie

Abstract

TESTING THE SUSCEPTIBILITY OF SOME POTATO BREEDS TO D. DESTRUCTOR AND D. DIPSACI NEMATHODA SPECIES 

The laboratory vegetative tests revealed the level of susceptibility of six potato breeds cultivated in Moldova - Agata, Romano, Irga, Albăstriu-mov, Kondor, Concorde, to Ditylenchus species – D. destructor, the obligatory parasite in the potato tubers, and D. dipsaci, the obligatory parasite in Allium but also in the garlic culture. The highest level of sus-ceptibility to D. destructor nematoda revealed Irga and Albăstriu-mov potato breeds. The percentage of invasion of the obtained harvest constituted 45-50% for Irga, being evaluated with mark 4 as the seriously affected species and 50-70% for Albăstriu-mov, evaluated with mark 5 as the largely affected species. The percentage of obtained harvest invasion of those three studied species – Romano, Kondor and Concorde varied between 11 and 28%, being evaluated with mark 3 as moderately infested breeds. Less susceptible species or the most resistant to D. destructor proved to be Agata breed. The level of invasion constituted 8-10%, evaluated with mark 2 which corresponds to the low-infested breeds. None of those six studied breeds of potatoes were not infested with nemathoda D. dipsaci parasiting garlic, which denotes the possibility of infesting the potatoes with other race of D. dipsaci. 

Keywords: susceptibility, potatoes, garlic, nematodes Ditylenchus destructor, D. dipsaci, testing.