Phomopsis cane and leaf spot

Phomopsis viticola is a fungus that infects grapes grown in most regions of Australia, although it might be sporadic in occurrence. The fungus over-winters in the buds, bark, mummified bunches and canes of infected vines. Spores are spread by splash-dispersal during wet spring weather. It is known that they can remain dormant in infected canes, spurs and dead wood for a number of years. Phomopsis can cause crop loss through girdling of shoots, and weakening and cracking of canes which consequently lowers productivity of vines. Yield loss is also attributed to infection of bunch stems and berry rot in humid conditions. This page provides links to resources on Phomopsis.