How to Manage Pests

Pests in Gardens and Landscapes

Watering grapes

Irrigation is essential for good vine growth and grape production. Grapes will adapt to low water but fruitfulness is reduced.

Water must be applied deeply and thoroughly to fill the root zone with water. Frequency will depend upon the soil type, the rooting depth of the vines, the depth of the soil, and the weather. Irrigating every 2 to 3 weeks is usually adequate under good soil conditions and moderate climate. Grapes may require more frequent irrigation in very hot climates in inland valleys.

Drip irrigation is an excellent method of watering. Generally, a fully trellised vine on a hot summer day in the Central Valley of California will require about 8 to10 gallons of water per day with drip irrigation. Vines tha t are less vigorous or untrellised will require 6 to 8 gallons per day. In Southern California, the rates should be similar to those of Central Valley climates. In areas along the coast, and in northern parts of California, the rates will be much lower.

Irrigation tips

Avoid water stress during the period between bloom and berry softening. Fruit on the vine may succumb to cracking if the vines are allowed to dry and then wet again. Check the soil profile to be sure the plants are getting adequate water but not too much.

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   Contact webmaster.