DISTRIBUTION OF SPECIES OF THE GENUS MELOIDOGYNE GOELDI, 1887 IN THE TASHKENT OASIS OF UZBEKISTAN

Abstract

Infection of plants with nematodes is still one of the main limitations of crop productivity. The research material is the infected rhizosphere and the roots of various plant crops collected on farms and personal subsidiary plots of the Tashkent Oasis. Four species of Meloidogyne Goeldi, 1887 were found in the study area in the Tashkent Oasis: M. arenaria, M. javanica, M. incognita, and M. hapla. It was established that infection of plants with nematodes depended on the characteristics of plant resistance, as well as soil and climatic conditions of the study region. However, the degree of occurrence of individual species on plants varied significantly. In terms of distribution of nematode species in the closed soil conditions of the Tashkent Oasis by districts and cities, M. arenaria was determined to be the most common species, whereas the least common species was M. javanica. The highest infection with nematodes of the genus Meloidogyne in the districts of the Tashkent Region was 64.0% on personal subsidiary farms of the Yangiyul District, and the lowest infection was 12.5% on personal subsidiary farms of the Buka District. M. arenaria is the most common species in the Tashkent Oasis, and M. javanica is the least common species. M. arenaria and M. incognita are dominating species, M. hapla is common, and M. javanica is rare.