Inflorescence Necrosis (Bunch Stem Necrosis)

Grape flower clusters develop necrotic tissue and fail to set fruit properly. This disorder affects wine and table grapes, reducing yields. Limited management information is currently available. Use disease-free planting stock and maintain orchard sanitation as preventive measures.

Manage inflorescence necrosis (bunch stem necrosis) by breaking the disease cycle at the points you can control: remove infected tissue and debris, reduce moisture on susceptible foliage, and maintain plant health through proper watering and fertilization. Healthy, well-sited plants resist infection more effectively than stressed ones, so addressing underlying site conditions often solves the problem better than repeated chemical applications.