Occurrence of apple stem grooving virus in Tunisian apple orchards.
In 2016, leaf samples of apples (Malus sp.) cultivars Golden, Lorka, Richared and Anna were randomly collected to investigate the occurrence of Apple stem grooving virus (ASGV) in Tunisia. Results showed that 31% of the tested samples were infected by ASGV. The infection rate ranged from 25% (cv. Richared) to 50% (cv. Golden). The causal pathogen was identified based on molecular (nucleotide sequences) analysis. This is thought to be the first report of Apple stem grooving virus on Malus sp. in Tunisia.