herbicide-free case studies

- CASE STUDY VI -

VINEYARD MANAGEMENT COMPANY

Vineyard area:

Management company for dozens of vineyards. Managing 600 acres in Napa County

Site Characteristics:

Variable (Calistoga to Angwin to Carneros)

Tools/Equipment used:

Gramegna Cultivator
Pellenc Cultivator
Hand work: Shovel

Passes:

2-3 depending on season and owner weed tolerance

Organic Herbicides?

Some. Only using Suppress currently but it needs multiple passes per year and efficacy is limited. Early applications have been replaced with sheep.

GRAZING?

Some. Depending on owner preference and availability

Tillage?

Site and owner dependent.

Weeds of concern?

Yellow starthistle; Bindweed/Morning glory

Certification(s):

CCOF
Napa Green Vineyard
Certified California Sustainable Winegrowing
Fish Friendly Farming

Undervine Weed Management Costs:

Tractor: Gramegna $500-800/pass/acre
Tractor: Pellenc $300-600/pass/acre
Handwork: Shovel $500-1000/pass/acre
Sheep $80-850/pass/acre (entirely dependent on site)

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