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)
Time Apply preplant to soil dry enough for thorough mixing; incorporate 2 to 3 inches deep immediately by cross-disking, rototilling, or subsurface application. For Eptam 20G, apply and incorporate just before planting, immediately after planting, or at the time of last cultivation.
Remarks Beans can be planted immediately; controls grasses and suppresses nightshade with no activity on smartweed. Inhibits shoot growth. For Eptam 20G: If applied before planting, rotary hoe during or shortly after emergence of the beans to break any crust which occurs. Do not exceed 15 lb/A 20G product on green beans grown on coarse textured soils.
Caution Suppresses quackgrass and yellow nutsedge growth but does not kill nutsedge tubers. In the Willamette Valley, experience suggests rates may be reduced to as low as 1.5 lb ai/A when mixed with trifluralin.
Site of action Group 8: lipid synthesis inhibitor but not an ACCase inhibitor
Chemical family Thiocarbamate
halosulfuron-methyl (Sandea)
Supplemental label as tank mix with EPTC (7E)
Rate 0.023 to 0.047 lb ai/A (0.5 to 1 oz/A Sandea)
Time Apply with Eptam (3.5 to 4 pints/A) and incorporate immediately to approximately 2 inches deep.
Remarks Suppresses nutsedge and improves control of broadleaves such as pigweed and lambsquarters. Does not improve control of nightshades.
Caution Read the label carefully to understand risks of using this product. Crop growth may be stunted briefly after emergence and maturity may be delayed. Consult label for rotation crops, interactions with soil-applied organophosphate insecticides that may increase crop injury, and other precautions. Do not exceed 2 oz/A herbicide per year.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Sulfonylurea
S-metolachlor (Dual Magnum, Brawl, Medal and others) or metolachlor (Cinch, Dual, Me-Too-Lachlor, or Parallel)
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Recommended S-metolachlor rates (pints/A) |
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Soil texture |
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Soil OM |
coarse |
medium |
fine |
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<3% |
1-1.33 |
1.33-1.67 |
1.33-1.67 |
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>3% |
1.33 |
1.33-1.67 |
1.67-2 |
Rate 0.98 to 1.95 lb ai/A (1 to 2 pints/A S-metolachlor). Products containing S-metolachlor, the more active isomer, require about 33% less product to achieve results comparable to metolachlor.
Time Apply preplant within 14 days of planting, and mechanically incorporate into top 2 inches of soil.
Remarks May delay maturity and/or reduce yield if soil is cold and wet, or if heavy rains fall after planting. Controls many summer annual grasses, pigweed other broadleaf weeds, but is weak on mustard weeds and nightshade.
Caution Do not cut for hay within 120 days following a Dual Magnum application. Do not use for forage within 60 days following a Dual Magnum application. Do not apply more than 2.0 pints/A of Dual Magnum during any one crop year.
Site of action Group 15: inhibits very long chain fatty acid synthesis
Chemical family Chloroacetamide
trifluralin (Treflan)
Rate 0.5 to 0.75 lb ai/A (1 to 1.5 pints/A), depending on soil type
Time Apply preplant and incorporate 2 to 3 inches deep within 24 hr, by cross-disking or by using a power take-off (PTO) rotary tiller. Spray only once and avoid overlapping.
Remarks Controls grasses and some broadleaf weeds such as lambsquarters, but nightshade is very tolerant. Erratic plant growth, enlarged stems below the soil surface, and poor root growth have been observed when maximum labeled rates were applied uniformly in fields with slight variations in soil type. Apply 1.5 pints on all soils with 2 to 5% organic matter.
Caution Consult label for planting sensitive crops within 12 to 20 months, especially cereals and grass seed. No grazing restrictions.
Site of action Group 3: microtubule assembly inhibitor
Chemical family Dinitroaniline