Apple Mosaic Virus

    Apple Mosaic Virus

    Apple mosaic virus. Apple mosaic virus.

    Apple mosaic virus.
    Apple mosaic virus.

    HOSTS

    • Apple

    DESCRIPTION

    Apple mosaic virus is spread only by grafting of diseased scion (buds, twigs, or roots) onto healthy stock. As such, it is not very common, and can easily be prevented. Infected trees are slow growing and produce low fruit yields. Leaves develop a distinctive, random pattern of chlorotic (yellow) tissue.

    BIOLOGY

    Apple mosaic virus is an uncommon and easily prevented disease that is spread by grafting of diseased scion (buds, twigs, or roots). It is the most wide-spread virus of the apple. It infects all kinds of apple in commerce.

    DISEASE CYCLE

    The virus is localized in leaf and shoot tissue, and does not spread by either insects or pollen.

    SYMPTOMS

    • Slow tree growth and low fruit yields
    • Distinctive, random pattern of chlorosis (yellowing) on leaves

    GENERAL MANAGEMENT

    Plant virus-free varieties, and use virus-free grafting scion. Diseased trees do not need to be removed, but should not be used as a source for scion material.


    Precautionary Statement: Utah State University and its employees are not responsible for the use, misuse, or damage caused by application or misapplication of products or information mentioned in this document. All pesticides are labeled with ingredients, instructions, and risks, and not all are registered for edible crops. “Restricted use” pesticides may only be applied by a licensed applicator. The pesticide applicator is legally responsible for proper use. USU makes no endorsement of the products listed in this publication.