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

Mealybug.

PHOTO 315. A further example of the incidence of mealybug in various stages of development on this shoot section of a Chardonnay grapevine. The dry petiole and leaf on the right are the result of plant sap that have been sucked out. The subsequent leaf fall and blowing about by the wind, offers an explanation for mealybug spreading to adjacent grapevines as well as to more distant vineyards.

PHOTO 316. Active feeding (sucking of plant sap) and secretion of honeydew by mealybug are illustrated on a young Chardonnay bunch. Note the shiny, sticky appearance of applicable organs, as well as the obvious drops of accumulated honeydew.

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