Apple chlorotic leafspot virus (ACLSV) is a plant pathogenic virus of the family Betaflexiviridae.
This virus reduces tree vigor (50% on pear), reduces yield (40% on pear), and causes quality reduction on fruits (if symptomatic).
This virus is a trichovirus with filamentous particles. It has no natural vectors and it is easily transmitted mechanically to herbaceous hosts.
The virus is only transmitted by grafting using infected clonal rootstocks, top-working existing trees with infected scion cultivars, and using infected trees as a source of propagation materials.