Preplant Incorporated or Postplant Surface

benefin (Balan)

Lettuce only, direct-seeded and transplanted

Rate 1.2 to 1.5 lb ai/a (2 to 2.5 lb/a Balan)

Time Apply from 10 weeks to just before planting; incorporate within 8 hr by cross-disking or with a power-takeoff rotary tiller.

Remarks May apply through center-pivot and lateral-move irrigation systems. Spray only once; avoid overlapping. See label about planting sensitive crops within 10 to 12 months. Control is poor for many broadleaf weeds. Inhibits mitosis in shoots and roots.

Site of action Group 3: microtubule assembly inhibitor

Chemical family Dinitroaniline

bensulide (Prefar 4E)

Lettuce, endive, cilantro (coriander), red chicory and arugula only; will severely injure spinach, New Zealand spinach, and Swiss chard

Rate 5 to 6 lb ai/a (5 to 6 quarts/a Prefar 4E)

Time Preplant or postplant surface

Crops Lettuce and other leafy vegetables including but not limited to arugula, Brassica leafy vegetables (see label), cardoon, celery, chicory, Chinese celery, chervil, cress, dock, endive, Florence fennel, and parsley. Do not use on spinach or Swiss chard.

Remarks Incorporate before planting in top 1 to 2 inches of soil by cross-disking or using a power take-off rotary tiller; or apply preemergence soon after planting, before crop and weeds begin germination, and activate with 1 inch overhead moisture. Sometimes the first flush of weeds must be controlled with cultivation before herbicide begins to control grass. See label for planting sensitive crops after treatment. Inhibits roots of seedlings.

Caution Do not apply more than once per year. Primarily a grass herbicide.

Site of action Group 8: lipid synthesis inhibitor but not an ACCase inhibitor

Chemical family Organophosphorus

cycloate (Ro-Neet)

Spinach only, Oregon and Washington only

Rate 2 to 3 lb ai/a (2.7 to 4 pints/a Ro-Neet)

Time Apply preplant to soil dry enough for thorough mixing; incorporate 2 to 3 inches deep immediately by cross-disking or using a rotary tiller within minutes after application.

Remarks Use on mineral soils only. Seed may be planted immediately after incorporation. Inhibits shoot growth. SLN labels OR-140010 and WA-150005.

Caution Preharvest interval is 45 days.

Site of action Group 8: lipid synthesis inhibitor but not an ACCase inhibitor

Chemical family Thiocarbamate

linuron (Lorox)

Cilantro, dill, and parsley

Rate 0.5 to 1 lb ai/a (1 to 2 lb/a Lorox)

Time Apply before crop and weeds emerge or after planting when cilantro has at least 3 leaves.

Remarks Use lower rates on light soils, but do not use on extremely sandy soils or soils with less than 1% organic matter. Plant seed 0.5 inches deep. Activate with 0.5 inch water. Maximum 3 lb/a per year west of the Rocky Mountains. PHI is 21 days.

Caution Cilantro and dill varieties may differ in tolerance to linuron. Do not apply to sandy or sandy loam soils to avoid injury. Consult label for planting sensitive crops within 4 months.

Site of action Group 7: photosystem II inhibitor

Chemical family Substituted urea

prometryn (Vegetable Pro Herbicide)

Dill only; Washington and Oregon only

Rate 0.75 lb ai/a (1.5 pints/a product)

Time Preplant or postplant surface

Remarks SLN labels WA-090018 and OR-090023. Apply 1.5 pints before planting and incorporate with water followed by 1.5 pints after planting (before weeds are 2 inches tall) and incorporate with water. Use in at least 20 gal/a spray volume.

Caution Preharvest interval is 48 days. Do not use on sand or loamy sand. Do not apply if dill is under water stress. Do not apply within two weeks after an application of any tank-mix containing an oil-based adjuvant.

Site of action Group 5: photosystem II inhibitor

Chemical family Triazine

prometryn (Caparol 4L)

Cilantro, fennel, and parsley

Rate Cilantro and fennel: 1 to 1.6 lb ai/a (2 to 3.2 pints/a Caparol 4L); Parsley: 0.5 lb ai/a (1 pint/a Caparol 4L)

Time Postplant, preemergence

Remarks Supplemental label. Use in at least 20 gal/a spray volume. See label for crop rotation restrictions. Use lower rates on coarse soils, or if low organic matter. Use higher rate on fine soils with high organic matter.

Caution Preharvest interval is 30 days. Do not use on sand or loamy sand. Do not exceed 3.2 pints/a per crop cycle.

Site of action Group 5: photosystem II inhibitor

Chemical family Triazine

pronamide (Kerb 50W)

Head lettuce and endive only, direct-seeded and transplant

Rate 1 to 2 lb ai/a (2 to 4 lb/a Kerb 50W)

Time Apply preplant and incorporate thoroughly 2 to 3 inches deep, or apply preemergence at or soon after planting, and activate with surface moisture to reduce loss of herbicide.

Remarks See label for some sensitive varieties and for planting sensitive crops within 12 months. Primarily for grass control. Inhibits mitosis.

Caution Restricted-use herbicide. Preharvest interval is 55 days. Do not apply to leaf lettuce.

Site of action Group 15: inhibits very long chain fatty acid synthesis

Chemical family Chloroacetamide

trifluralin (Treflan, Agristar Trifluralin 4EC)

Endive and chicory only

Rate 0.5 to 1 lb ai/a (1 to 2 pints/a product) depending on soil type and organic matter content (see label)

Time Apply preplant and incorporate in top 1 to 2 inches of soil by cross-disking or using a power take-off rotary tiller.

Caution Consult label for lengthy crop rotation restrictions when using this product.

Site of action Group 3: microtubule assembly inhibitor

Chemical family Dinitroaniline