A Guide to Grapevine Abnormalities in South Africa - P.G. GOUSSARD

Bacterial blight.

PHOTO 141. Characteristic of bacterial blight is delayed bud burst and shoots with short internodes, while no bud burst and early dieback of shoots after bud burst are common. Shoots with short internodes must not be confused with dead-arm disease. Also note that leaves have been eaten, but such damage obviously has nothing to do with bacterial blight.

PHOTO 142. A typical example of delayed bud burst where stunted shoots are consumed by bacterial blight at an early stage. Typical eating patterns of snails (leaves) and snout beetles (shoots) are also portrayed.

96 • A Guide to Grapevine Abnormalities in South Africa