Fruit Set: In late spring or early summer, fertilized flowers swell into tiny bunches of grapes.
Berry: This term has two meanings. An individual grape is called a berry by grapegrowers. It also describes the set of fruit flavors found in many wines, which includes strawberry, raspberry, blueberry, etc.
Millerandage: Also known as "hens and chicks," millerandage is an irregular fruit set in which the berries on a grape cluster are not uniform in size, with some achieving full size while others remain tiny and seedless.
Gray Rot: Gray rot sets in when the fruit fungus Botrytis cinerea, as a result of persistent wet, humid conditions, overruns a crop and destroys the fruit. Fruit afflicted with gray rot appears to be covered in a carpet of gray fur.