Botrytis

Botrytis cinerea

Often called grey mould, Botrytis cinerea in wet seasons is responsible for the greatest crop losses in vineyards. Classically appears as bunch infections of browning berries with grey sporulation. Late season berry slip skin is also caused by botrytis. Botrytis can also be an issue in other crops including citrus, kiwifruit, onions strawberries and berryfruits.

Related Diseases

Powdery mildew - Grapes

Erysiphe necator

Powdery mildew (Erysiphe necator) is a widespread and common disease of grapes in New Zealand. Obvious as white spots which can spread across leaves producing a grey-white sporulation. Bunches are also infected with the characteristic grey-white sporulation symptoms. Winemakers detest powdery mildew as even minor infection of grapes has a detrimental effect on subsequent wine quality.

Sclerotinia

Sclerotinia sclerotiorum

Is an important disease of kiwifruit causing crop losses through flower blight, premature fruit drop and fruit scarring. Sclerotinia (Sclerotinia sclerotiorum) infects kiwifruit over the flowering period and is favored by warm and moist weather conditions.