Chapter 24

Vineyard Weed Management

(book excerpts)

Weeds can present problems in vineyards, as in many cropping systems. Weeds compete with grapevines for water, light, and nutrients; however, the effects of this competition vary throughout the life of the vine. Weeds may also serve as alternate hosts for disease pathogens, nematodes, and insects; they may also serve as a habitat for vertebrate pests. They may interfere with harvest, spray equipment, and other cultural operations. Weed competition is most critical during the early stages of vine growth, usually the first three years after planting. Weed competition can decrease survival, severely retard vine growth, and prolong the time before a vineyard comes into production. In established vineyards, the critical period of weed competition is from bloom until véraison, when days are long, grapevine leaf area is maximized, and when soil moisture may be limiting. During winter months, presence of weeds as a ground cover is not considered to be a problem and may not adversely affect the vines. In fact, weeds may help conserve soil and improve tilth and access to vineyards during winter months.

Click on the following topics for more information on vineyard weed management.

Topics Within This Chapter:

  • Weed Biology
  • Life Cycle of Weeds
  • Annuals
  • Biennials
  • Perennials
  • Reproduction in Weeds
  • Weed Seed Banks
  • Weed Emergence
  • Beneficial Weeds
  • Cultural Weed Control
  • Cover Crops
  • Effective Cover Crop Species
  • Cover Crop Residues as Mulch
  • Allelopathic Cover Crops
  • Quarantine
  • Mulching
  • Plastic Mulches
  • Controlling Weeds by Mowing
  • Types of Mowers
  • Flaming
  • Advantages and Disadvantages
  • Timing of Flame Weeding
  • Controlling Weeds by Cultivation
  • Weather and Soil Conditions Suitable for Cultivation
  • Mechanical Weed Control Implements
  • Row-Middle Weed Control
  • In-Row Weed Control
  • Chemical Control
  • Herbicide Treatment Options
  • Treatment Options in Young Vineyards
  • Treatment Options in Established Vineyards
  • Application Rate of Herbicides
  • Timing of Herbicide Applications
  • Equipment Used in Applying Herbicides
  • Other Herbicide Considerations
  • Selected References