Weeds Pages
| Herbicide common name | Amount per acre | REI‡ | PHI‡ | |
|---|---|---|---|---|
| (Example trade name) | (hours) | (days) | ||
| Not all registered pesticides are listed. The following are listed alphabetically. When choosing a pesticide, consider information relating to environmental impact, resistance management, the pesticide's properties, and application timing. Tank mixes may be necessary to achieve desired control; see Susceptibility of Weeds to Herbicide Control for information on specific weed control. Always read the label of the product being used. | ||||
| FALLOW BEDS BEFORE PLANTING | ||||
| After weeds emerge | ||||
| A. | 2,4-D AMINE* | 0.95–1.9 lb a.e. | ||
| (Weedar 64) | 2–4 pt | 48 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 4 | ||||
| COMMENTS: Selective on broadleaf weeds only, including field bindweed. Apply by ground or air at least 30 days before planting. Permit may be required by county agricultural commissioner. | ||||
| B. | CARFENTRAZONE | 0.0148–0.0297 lb a.i. | ||
| (Shark EW) | 1–2 fl oz | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Apply up to one day after planting. Can be applied by ground or air. Use a spray volume of 5 to 30 gallons/acre. Surfactant is required. Needs good spray coverage. Best on small annual broadleaf weeds. | ||||
| C. | DICAMBA | 0.5–2.0 lb a.e. | ||
| (Banvel) | 1–4 pt | 24 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 4 | ||||
| COMMENTS: Selective on broadleaf weeds only, including field bindweed. Delay planting for 45 days per each pint of Banvel applied per acre. Permit may be required by county agricultural commissioner. | ||||
| D. | GLYPHOSATE | |||
| (Roundup WeatherMAX) | See label | 4 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 9 | ||||
| COMMENTS: Apply before crop emergence. Can be applied by ground or air. See label for specific restrictions on aerial applications. Use a spray volume of 3 to 20 gallons/acre. Add ammonium sulfate (AMS) to tank first. Weeds should be less than 4 inches tall. Wait 7 days to cultivate perennials. Mix with oxyfluorfen for broader control. | ||||
| E. | OXYFLUORFEN | 0.25–0.5 lb a.i. | ||
| (Goal 2XL) | 1–2 pt | 24 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Apply at least 60 days before planting. Can be applied by ground or air. Use a spray volume of 5 to 30 gallons/acre. Mix with glyphosate for broad control. Work beds 2.5 inches deep before planting. Certain formulations emit high amounts of volatile organic compounds (VOCs); use low-VOC formulations. | ||||
| F. | PARAQUAT DICHLORIDE* | 0.4875–1.0125 lb a.e. | ||
| (Gramoxone SL 3.0) | 1.3–2.7 pt | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 22 | ||||
| COMMENTS: Can be applied by ground or air. Use a spray volume of 5 to 20 gallons/acre. A nonionic surfactant is required. Needs good spray coverage. Use on small annual weeds. | ||||
| G. | SAFLUFENACIL | 0.0445 lb a.i. | ||
| (Sharpen) | 2 fl oz/acre | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| PREPLANT | ||||
| Before weeds emerge | ||||
| A. | EPTC | 3.0625–3.9375 lb a.i. | ||
| (Eptam 7E) | 3.5–4.5 pt | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 8 | ||||
| COMMENTS: Only for use on common beans. Mechanically incorporate 2 inches deep. Can be metered through irrigation water immediately after planting. | ||||
| B. | ETHALFLURALIN | 0.5625–1.6875 lb a.i. | ||
| (Sonalan HFP) | 1.5–4.5 pt | 24 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 3 | ||||
| COMMENTS: Use 3 to 4.5 pt/acre if nightshade, groundcherry, or both are present. Use a spray volume of at least 5 gallons/acre. Mechanically incorporate 2 to 3 inches deep within 24 hours of application. Ethalfluralin can be tank mixed with s-metolachlor and preplant incorporated. Only use higher rates of ethalfluralin for groundcherry and nightshade control. For tank mixes, observe directions for use on all labels and employ the most restrictive limits and precautions. | ||||
| C. | FLUMIOXAZIN | 0.063 lb a.i. (garbanzo)
0.0472 (other beans) |
||
| (Chateau EZ) | 2 fl oz (garbanzo)
1.5 fl oz (other beans) |
12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| D. | METRIBUZIN | 0.2475–0.375 lb a.i. | ||
| (Metribuzin 75) | 0.33–0.5 lb | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 5 | ||||
| COMMENTS: Only for use on garbanzos. Application by ground only. Use a spray volume of 10 to 40 gallons/acre. Mechanically incorporate 1 to 2 inches deep. Crop injury can occur under rainy conditions. | ||||
| E. | PENDIMETHALIN | 0.7125–1.425 lb a.i. | ||
| (Prowl H2O) | 1.5–3 pt | 24 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 3 | ||||
| COMMENTS: Apply and incorporate 1 to 2 inches using rainfall, irrigation, or shallow mechanization, within 60 days of planting. | ||||
| F. | S-METOLACHLOR | 0.9525–1.905 lb a.i. | ||
| (Dual Magnum) | 1–2 pt | 24 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 15 | ||||
| COMMENTS: Mechanically incorporate 2 inches deep within 14 days of planting. Don't cut for hay within 120 days of application. Do not use for forage within 60 days of application. Can cause crop injury of beans planted deep in cold, wet soil. S-metolachlor can be tank mixed with trifluralin or pendimethalin and preplant incorporated. For tank mixes, observe directions for use on all labels and employ the most restrictive limits and precautions. Use lower rates on sandy soils. | ||||
| G. | TRIFLURALIN | |||
| (Treflan HFP) | See label | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 3 | ||||
| COMMENTS: Mechanically incorporate 2 to 4 inches deep within 24 hours. Can mix with EPTC or s-metolachlor. | ||||
| POSTPLANT | ||||
| Before crop and weeds emerge | ||||
| A. | FLUMIOXAZIN | 0.063 lb a.i. (garbanzo)
0.0472 (other beans) |
||
| (Chateau EZ) | 2 fl oz (garbanzo)
1.5 fl oz (other beans) |
12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: In garbanzo apply within 2 days after planting. Activated with half an inch of rainfall or irrigation. | ||||
| B. | METRIBUZIN | 0.2475–0.375 lb a.i. | ||
| (Metribuzin 75) | 0.33–0.5 lb | 12 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 5 | ||||
| COMMENTS: Only for use on garbanzos. Apply by ground only. Use a spray volume of 10 to 40 gallons/acre. Activate with shallow mechanical incorporation or with less than ½ inch of rainfall or sprinkler irrigation. Crop injury can occur under rainy, wet conditions. | ||||
| C. | OXYFLUORFEN | 0.25 lb a.i. | ||
| (Goal 2XL) | 1 pt | 24 | NA | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Only for use on garbanzos. Apply within 2 days after planting. Use a spray volume of at least 20 gallons/acre. Activate with 1/2 inch of rainfall, sprinkler, or furrow irrigation. | ||||
| After crop and weeds emerge | ||||
| A. | BENTAZON | 0.5–1 lb a.i. | ||
| (Basagran) | 1–2 pt | 48 | 30 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 6 | ||||
| COMMENTS: Not for use on garbanzo or black eyes. Beans should have at least one fully expanded trifoliate leaf. Crop oil concentrate, 28% urea ammonium nitrate, or ammonium sulfate (AMS) can improve weed control but may also increase crop injury. Can be applied by ground or air. Use a spray volume of 5 to 20 gallons/acre. Thorough spray coverage is needed. Does not work well on weeds stressed for moisture. Does not control grasses. Don't cultivate 5 days before or 7 days after application. Split applications 10 to 14 days apart for nutsedge control. | ||||
| B. | CARFENTRAZONE | 0.0074–0.0297 lb a.i. | ||
| (Shark EW) | 0.5–2 fl oz | 12 | 0 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Hooded or shielded spray to row middles. Use a spray volume of at least 10 gallons/acre. Surfactant needed. Keep spray off crop foliage. Travel speed less than 5 mph. Broadleaf weeds small. Needs good spray coverage. | ||||
| C. | CLETHODIM | 0.0682–0.2425 lb a.i. | ||
| (Select Max) | 9–32 fl oz | 24 | 30 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 1 | ||||
| COMMENTS: Controls grasses only. Ammonium sulfate (AMS) mixed in tank first. Nonionic surfactant needed. Can be applied by ground or air. Use a spray volume of 3 to 40 gallons/acre. Apply within 7 days after irrigating. Repeat applications 14 days apart. Cultivate 7 to 14 days later. | ||||
| D. | FLUAZIFOP | 0.125–0.375 lb a.i. | ||
| (Fusilade DX) | 8–24 fl oz | 12 | 60 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 1 | ||||
| COMMENTS: Not for blackeyes. Controls grasses only. Crop oil concentrate or nonionic surfactant needed. Use a spray volume of 5 to 40 gallons/acre. Apply within 7 days after irrigating. Repeat applications at 14 days apart. Cultivate 7 to 14 days later. | ||||
| E. | HALOSULFURON | 0.0234–0.0314 lb a.i. | ||
| (Sandea) | 0.5–0.67 oz | 12 | 30 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 2 | ||||
| COMMENT: Only apply as a post directed row middle or furrow application.. Only use a NIS surfactant, no COC or MSO for post-emergent application. | ||||
| F | SETHOXYDIM | 0.28125–0.46875 lb a.i. | ||
| (Poast) | 1.5–2.5 pt | 12 | 30 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 1 | ||||
| COMMENTS: Controls grasses only. Crop oil concentrate or methylated seed oil needed. Can be applied by ground or air. Use a spray volume of at least 10 gallons/acre. Apply within 7 days after an irrigating. Repeat applications 14 days apart. Cultivate 7 to 14 days later. Can mix with bentazon in kidney and lima beans. | ||||
| LAY-BY | ||||
| Before weeds emerge | ||||
| A. | EPTC | 1.9688–3.9375 lb a.i. | ||
| (Eptam 7E) | 2.25–4.5 pt | 12 | 45 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 8 | ||||
| COMMENTS: Use only for use on kidney beans. Directed application before pods form. Keep off crop foliage. Activate with irrigation water (or rain event, if applicable). | ||||
| PREHARVEST | ||||
| A. | CARFENTRAZONE | 0.0148–0.0297 lb a.i. | ||
| (Shark EW) | 1–2 fl oz | 12 | 0 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Can be applied by ground or air. Nonionic surfactant, crop oil concentrate, or methylated seed oil needed. 15 to 30 gallons/acre with good coverage. | ||||
| B. | FLUMIOXAZIN | up to 0.0807 lb a.i. | ||
| (Chateau EZ) | up to 3 fl oz | 12 | 5 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Mix with approved adjuvant. | ||||
| C. | GLYPHOSATE | |||
| (Roundup WeatherMAX) | See label | 4 | 7 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 9 | ||||
| COMMENTS: Do not make a preharvest application of this herbicide on cowpeas. Do not use glyphosate on dry bean seed stock destined for planting. Dry bean seed does not mature all at the same time, so in a field, one might have young and mature seed. If a seed crop is sprayed with glyphosate when it is still immature there may be translocation into the seed and subsequent germination will be affected. | ||||
| D. | SAFLUFENACIL | 0.0223–0.0445 lb a.i. | ||
| (Sharpen) | 1–2 fl oz | 12 | 2 | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: 14 | ||||
| COMMENTS: Not for use for garbanzo bean (chickpea) desiccation in California. | ||||
| D. | SODIUM CHLORATE | 6 lb a.i. | ||
| (Defol 5) | 4.8 qts | 12 | See label | |
| WSSA MODE-OF-ACTION GROUP NUMBER1: NC | ||||
| ‡ | Restricted entry interval (REI) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Preharvest interval (PHI) is the number of days from treatment to harvest. In some cases, the REI exceeds the PHI. The longer of two intervals is the minimum time that must elapse before harvest. |
| * | Permit required from county agricultural commissioner for purchase or use. |
| 1 | Group numbers are assigned by the Weed Science Society of America (WSSA) according to different modes of action. Although weeds may exhibit multiple resistance across many groups, mode-of-action numbers are useful in planning mixtures or rotations of herbicides with different modes of action. For more information, see http://wssa.net. |