EPTC (Eptam)
Rate 4 to 6 lb ai/A. Use 6-lb rate on finer soils or on heavy mats of roots and rhizomes.
Time Apply in spring or early fall on a thoroughly prepared seedbed.
Remarks A preplant soil-incorporated herbicide that also gives excellent results when metered into irrigation water. Effective if used in conjunction with a cropping program. Total kill requires at least 2 years. Prevent seedlings from reestablishing the stand. Suggested crop programs are:
- Spray 4 to 6 lb/A in spring, and seed red clover or alfalfa on soil that has been limed and fertilized for best legume growth.
- Spray 2 to 3 lb/A in spring; seed to corn for 2 years or follow with one of the other crops listed.
- Spray 4 to 6 lb/A in fall and seed to crimson clover or fall flax. The subsequent crop should tolerate EPTC. Re-treat the second year.
- Spray 4 lb/A in spring and summer fallow; follow by seeding to winter wheat or barley and treating with diuron to kill velvetgrass seedlings.
Caution Incorporate EPTC into soil 2 to 3 inches deep immediately after application. Use sprinkler irrigation to incorporate EPTC in very dry weather.
Site of action Group 8: lipid synthesis inhibitor but not an ACCase inhibitor
Chemical family Thiocarbamate
fluazifop (Fusilade DX)
Rate 0.25 to 0.375 lb ai/A + 1% crop oil concentrate or 0.25% nonionic surfactant
Time Apply in early spring when grass is growing well.
Remarks Repeat applications may be needed to control well-established grass. Do not mix with other pesticides unless label recommends.
Caution Do not graze treated fields.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Aryloxyphenoxy propionate
sethoxydim (Poast)
Rate Up to 0.5 lb ai/A + 2 pints/A of an oil concentrate
Time Apply in early spring when grass is growing well. Applying after April 1 may be less effective.
Remarks Repeat applications may be needed to control well-established grass.
Caution Do not graze treated fields.
Site of action Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family Cyclohexanedione