Environmental factors that influence the development of grapevine diseases include temperature, sunlight, humidity, wind, soil moisture, mineral nutrition and the condition and stage of growth of the grapevine tissue affected by the disease. Like other organisms, grapevine diseases interact with their environment. Particular conditions are required for growth and development of these organisms. Since many diseases and pests are specific to the grapevine, they usually thrive under the same conditions that promote the growth of the vine. Knowledge of both the biology and the environmental requirements of grapevine diseases is essential in the formulation of an effective and sensible control strategy.
Diseases covered: Powdery mildew, Bunch rot, Eutypa dieback, Pierce's Disease, Phomopsis dead arm.COMPLETE TEXT AVAILABLE FREE FROM:
DR. STEPHEN KREBS
VITICULTURE AND WINERY TECHNOLOGY
NAPA VALLEY COLLEGE
NAPA, CALIFORNIA, 94558
(707) 253-3259
skrebs@campus.nvc.cc.ca.us