Grapevines and its worst enemy; grape dead arm disease

Commonly caused by a deep seated wood rot in the arms and trunk, the grape dead arm disease is one deadly disease that can destroy grapevines. At the early stages of the disease, it can slow the growth of grapevines and can cause the leaves to turn into yellow. Also, the severity of this disease depends on weather conditions, as its intensity level is at high during moist and wet conditions.

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Source: Gardening Know How

Grape (Vitis spp.)-Cane and Leaf Spot | Pacific Northwest Pest Management  Handbooks

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