First report of Phomopsis asparagi causing stem blight on asparagus in Vietnam.
Asparagus (Asparagus officinalis) has become an economically important crop in many regions of Vietnam. A survey conducted in the asparagus growing areas of North Vietnam in 2018 revealed that more than 70% of asparagus plants were exhibiting disease symptoms. Oval-shaped lesions with dark brown or black pycnidia were found on all aerial parts of the plant, extending and covering large areas of stems. Diseased samples were collected from Hanoi, Bac Ninh and Bac Giang regions. The causal pathogen was isolated and identified as Phomopsis asparagi based on morphological, molecular and pathogenicity analyses. The obtained sequence was deposited in GenBank (Accession no. MK400353). This is the first report of P. asparagi infecting asparagus in Vietnam.