Weed Management Handbook

EPTC (Eptam 7E and 20G)

Not for use on adzuki, cow peas, lima beans, or flat-podded beans (except Romano)

Rate 2 to 4 lb ai/A 7E (2.25 to 4.5 pints/A); 3 to 4 lb ai/A 20G (15 to 20 lb/A)

See "Site Preparation, Stale Seedbeds, and Selective Postemergence Applications" at the beginning of Section P. in this handbook.

paraquat (Gramoxone 3.0)

Stale seedbeds

Rate 0.50 to 1 lb paraquat cation/A (2 to 4 pints/A); use higher rates for heavy weed infestation.

2,4-D (several trade names)

Rate 1.4 to 1.9 lb ae/A

Time Apply on actively growing weeds, usually in April or May, using a ground sprayer with drop nozzles to reduce contact of spray with crop.

See "Site Preparation, Stale Seedbeds, and Selective Postemergence Applications" at the beginning of Section P. for additional options for weed control during asparagus establishment.

clethodim (Select Max and others)

Rate 0.07 to 0.12 lb ai/A (9 to 16 fl oz/A)

caprylic plus capric acids (Suppress)

Rate 3% to 9% dilution in 25 to 100 gal water, depending on weed size, temperature, and sunlight intensity.

Time Any time during the crop growing season to control weeds in row-middles or to burn down unwanted crop vegetation.

Several herbicides are registered for use in vegetable crops as burndown products in stale and false seedbed systems. False seedbeds are prepared well in advance of vegetable seeding, and weed seedlings are encouraged to emerge before the crop is seeded. Cultivation, herbicide application, or flaming are used to destroy the emerged seedlings.

soil fumigants

See the current edition of the PNW Plant Disease Management Handbook for application details and approved materials.

glyphosate (Roundup and many others)

Rate Consult labels

Time Apply to actively growing weeds with 'site preparation' or 'preemergence to crops' uses listed on label.

Cultivation After harvest, withhold irrigation to induce "summer dormancy" in strawberries before treating perennial weeds. Cultivate row middles to reduce runners and control weeds.

2,4-D (Formula 40 and others)

Rate 0.9 to 1.4 lb ae/A (1 to 1.5 quarts/A Formula 40)

Time Apply immediately after last harvest, in 20 to 25 gal/A water.