Affiliation:
1. Center for Biotechnology and Microbiology, University of Swat, Pakistan.
Abstract
Onion is an important vegetable and a source of income for formers in
District Swat, Pakistan. However, the crop is attacked by several pathogens
i.e. fungi, bacteria, viruses, and nematodes. Therefore, a study was carried
out for the estimation of fungal diseases of onion crop in district Swat. Within
this study, about 50 samples of diseased onion crop were collected from 17
different regions of District Swat. The most prevalent fungal borne onion
diseases were black mold (38%), onion rust (32%), Blue Mold Rot (10%) and
seedling. Fungal species were consistently isolated from all infected
samples. In which Aspergillus was isolated from 82% samples, Puccinia Alli
was from 70%, Alternaria porri from 52%, Fusarium spp from 42%
Penicillium spp from 40%, Peronospora destructor from 35%, Pyhtaium
from 23% and Rhizoctonia solani from 18% of samples. These fungal species
consistently isolated and cultured from diseased onion plants of different
fields in Swat.
Keywords: Onion crop, Fungal diseases, Aspergillus.
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