What defect is associated with table grapes?

Waterberry is a physiological disorder specifically related to table grapes that arises from irregular watering practices, often linked to excessive soil moisture during certain growth stages. This condition causes the grape berries to become waterlogged, leading to a condition where the fruit can swell and burst, creating a blemished and unmarketable appearance. It primarily affects the quality and yield of the grapes, making waterberry a significant defect in table grape cultivation.

In contrast, sunburn refers to damage caused by excessive sunlight, usually affecting the skin of the grape berries and leading to discoloration. The grapevine moth is an insect pest that can damage vineyards but is not classified as a defect in the fruit itself. Powdery mildew, a fungal disease, can affect the foliage and overall health of the plant, but it does not specifically define a defect of the actual grape berries like waterberry does.