Chapter 23

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:

  • Classification of Weeds
  • Annuals
  • Biennials
  • Perennials
  • Integrated Weed Management
  • Weed Monitoring
  • Weed Identification
  • Maintaining Accurate Weed Records
  • Chemical Control
  • Herbicides
  • Pre-emergence Herbicides
  • Post-emergence Herbicides
  • Herbicide Treatment Options
  • Treatment Options in Young Vineyards
  • Treatment Options in Established Vineyards
  • Application Rate, Timing, and Equipment
  • Rate
  • Timing
  • Equipment
  • Other Herbicide Considerations
  • Herbicide Resistance
  • Cultural Control
  • Quarantine
  • Mulching
  • Advantages and Disadvantages
  • Plastic Mulches
  • Organic Mulches
  • Flaming
  • Cover Crops
  • Cover Crop Residues as Mulch
  • Allelopathic Cover Crops
  • Effective Species
  • Mechanical Control
  • Cultivation
  • Mowing
  • Mechanical Implements
  • Row-Middle Weed Control
  • In-row Weed Control
  • References