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

Wood-boring beetles (337); quince stem borer (338).

PHOTO 337. This example is typical of damage caused by wood-boring beetles. Note the hole in the 15:00 position (third from right) where a beetle is clearly visible.

PHOTO 338. A characteristic example of a quince stem-borer, in which case holes with a diameter of up to 10 mm may occur in trunk sections.

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