Abstract
In the article the tasks have been set on the inventory of the species composition of fungi of the genus Alternaria Nees ex Walroth - pathogen of various Alternaria diseases of vegetable crops in Uzbekistan. More than 200 isolates were collected and about 150 monosporous pure cultures were obtained from them. According to preliminary data, they belong to 15 species of the genus Alternaria and have been isolated from the 12 most important crop species. It was found that a more accurate identification of species requires the study of a wide range of morphological and biochemical traits. The article discusses the issue of infection of vegetable seeds in Uzbekistan. The composition of micromycetes living on seeds of vegetable and green crops was revealed. In total, 21 species were recorded, of which 9 species includes to Alternaria genus.
Highlights
Fungi of the genus Alternaria Nees ex Walroth are widespread in nature
In the article the tasks have been set on the inventory of the species composition of fungi of the genus Alternaria Nees ex Walroth - pathogen of various Alternaria diseases of vegetable crops in Uzbekistan
The composition of micromycetes living on seeds of vegetable and green crops was revealed
Summary
Fungi of the genus Alternaria Nees ex Walroth are widespread in nature. Due to their wide ecological amplitude, they have adapted to parasitism on various important crops. Wild-growing and weed plants, called Alternaria, are known to all phytopathologists and the staff of the plant protection system. Species of this genus are found all over the world. Some of them are harmless saprotrophs, while others, parasitic species, cause harmful diseases of crops. The identification of many micromycetes and, in particular, Alternaria species is associated with a number of difficulties, such as the similarity of morphological characteristics of different species and, at the same time, intraspecific variability of traits
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