The Benefits of Using Certified, Virus-tested, True-to-type Plant Material
Apple and pear trees are prone to infection with a range of viruses, of which the most important in South Africa are Apple mosaic virus (ApMV) and Apple chlorotic leaf spot virus (ACLSV). Both viruses can exist in trees for long periods without showing visible symptoms, i.e., they are latent (especially ACLSV). Visible symptoms of