Phomopsis disease of cane and leaf are prevalent throughout Northeastern and Mid-Atlantic region, including New Jersey. Most Vitis vinifera, and interspecific varieties are susceptible to this pathogen. The inoculum is carried in spring from over wintering sites by water onto susceptible tissues. In wet spring, grapevines staying wet for the longer duration following the bud break, is the right condition for the infection. Fruit and rachis infections can be severe if not controlled. Rachis susceptibility reduces few days after bloom. Berry infections remain inactive until preharvest, after which they colonize the fruit.
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