bensulide (Prefar 4-E)
Excluding rutabaga, radish, turnip, and horseradish
Rate 5 to 6 lb ai/A (5 to 6 quarts/A)
Time Apply preplant and incorporate 1 to 2 inches deep simultaneously or immediately after application by cross-disking or using a power take-off rotary tiller. Apply preemergence only on crops where the application is followed by immediate irrigation.
Remarks Does not control nightshade. Incorporate to 1 inch for best results. If applied post plant, irrigate within 36 hr and wet the soil to at least 2.
Caution Do not exceed one application every 12 months. (Inhibits seedling roots). Do not use on spinach or Swiss chard as severe injury will occur.
Site of action Group 8: lipid synthesis inhibitor but not an ACCase inhibitor
Chemical family Organophosphorus
trifluralin (Treflan 4L)
Excluding horseradish, rutabaga and turnip roots
Rate 0.5 to 1 lb ai/A (1 to 2 pints/A Treflan 4L), depending on whether the crop is direct-seeded or transplanted, and on soil texture and organic matter content.
Time Apply as a preplant soil-incorporated treatment before planting or transplanting.
Remarks Direct-seeded crops may be stunted if rates exceed limits for soil type and organic matter content, or if soil texture varies greatly within a field. Chinese cabbage and kohlrabi may be particularly sensitive. Consult label for soil type, OM content, and application instructions.
Site of action Group 3: microtubule assembly inhibitor
Chemical family Dinitroaniline