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2009 Weed Control Guide
for Vegetable Crops
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CROP INFORMATION
Asparagus
Beans
Beets
Broccoli
Brussels Sprouts
Cabbage
Carrot
Cauliflower
Celery
Chicory
Chinese Vegetables
Collards
Corn
Cucumber
Dill
Eggplant
Endive
Escarole
Garlic
Horseradish
Kale
Kohlrabi
Leek
Lettuce
Mint
Muskmelon
Mustard
Okra
Onion
Parsley
Parsnip
Peas
Pepper
Potato
Pumpkin
Radish
Rhubarb
Rutabaga
Spinach
Squash
Strawberry
Sweet Potato
Swiss Chard
Tomato
Turnip
Turnip Greens
Watermelon
Non-crop Land
- ASPARAGUS (Seed beds for crown production)
- ASPARAGUS (Newly planted crowns)
- ASPARAGUS (Established one year or more)
ASPARAGUS (Seed beds for crown production)
| Weed Problem | Chemical | Pounds Active Ingredient (AI)/Acre | Amount of Commercial Product/Acre |
Remarks and Limitations Items in bold have changed since the printed bulletin. |
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| Emerged annuals | paraquat (GRAMOXONE INTEON 2L) |
0.68-1 | 2.5-4.0 pt |
Apply after weeds emerge but before asparagus emerges. Include 1 pt NIS per 100 gal of spray mix. | ||||
| Preemergence annuals | terbacil (SINBAR 80W) |
0.5-1.2 | 0.62-1.5 lb |
Spray 300 lb/acre activated charcoal in a 1-inch band over rows at planting. Then apply Sinbar. One-half inch of moisture within 2 weeks of application will improve control. Do not use on soils with less than 1% organic matter. Do not plant any crop other than asparagus within 2 years of application. | ||||
| Pre- or postemergence broadleaves | linuron (LOROX 50DF) |
0.5-1.5 | 1-3 lb |
PREEMERGENCE: Plant seed 1-1.5 inches deep; spray a 1-inch band of activated charcoal over the rows at a rate of 300 lb/acre of actual area sprayed (15 lb/acre with 20-inch rows). Broadcast 2 lb of Lorox (1 lb ai) over the field. POSTEMERGENCE: When fern is 6-18 inches high and weeds are not over 4 inches high, broadcast 1-2 lb Lorox (1/2-1 lb ai). Do not exceed a total of 2 lb ai/acre/year. | ||||
| Postemergence broadleaves, nutsedge | halosulfuron (SANDEA 75W) |
0.023-0.047 | 0.5-1.0 oz |
Apply after fern is 6 weeks old. Do no apply more than 2 oz/acre/year. Do not add adjuvant. Make 2 applications for nutsedge control. | ||||
| Postemergence grasses | clethodim (SELECT MAX 0.97E) |
0.068-0.12 | 9-16 fl oz |
Include 0.25% NIS/acre. Maximum of 64 fl oz/acre/yr. 1 day PHI. | ||||
| fluazifop-P (FUSILADE DX 2E) |
0.25-0.38 | 1-1.5 pt |
Include 1 qt COC or 1 pt NIS/acre. Use high rate on quackgrass. | |||||
| sethoxydim (POAST 1.5E) |
0.19-0.38 | 1-2 pt |
Apply to actively growing grasses. Include 1 qt COC/acre. Maximum 5 pt/acre/year and 2 applications. | |||||
ASPARAGUS (Newly planted crowns)
| Weed Problem | Chemical | Pounds Active Ingredient (AI)/Acre | Amount of Commercial Product/Acre |
Remarks and Limitations Items in bold have changed since the printed bulletin. |
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| Germinating or emerged broadleaves | linuron (LOROX 50DF) |
1-2 | 2-4 lb |
PREEMERGENCE: Broadcast 2-4 lb Lorox (1-2 lb ai) before crop emergence.
POSTEMERGENCE: When fern is 6-18 inches high and weeds are not over 4 inches high, broadcast 2 lb Lorox (1 lb ai). Do not exceed a total of 2 lb ai/acre/year. |
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| Postemergence broadleaves, nutsedge | halosulfuron (SANDEA 75W) |
0.023-0.047 | 0.5-1.0 oz |
Apply after fern is 6 weeks old. Do not apply more than 2 oz/acre/year. Do not add adjuvant. Make 2 applications for nutsedge control. | ||||
| Postemergence grasses | clethodim (SELECT MAX 0.97E) |
0.068-0.12 | 0.12 |
Include 0.25% NIS/acre. Maximum of 64 fl oz/acre/yr. 1 day PHI. | ||||
| fluazifop-P (FUSILADE DX 2E) |
0.25-0.38 | 1-1.5 pt |
Include 1 qt COC or 1 pt NIS/acre. Use high rate on quackgrass. | |||||
| sethoxydim (POAST 1.5E) |
0.19-0.38 | 1-2 pt |
Apply to actively growing grasses. Include 1 qt COC/acre. Maximum 5 pt/acre/year and 2 applications. | |||||
ASPARAGUS (Established one year or more)
| Weed Problem | Chemical | Pounds Active Ingredient (AI)/Acre | Amount of Commercial Product/Acre |
Remarks and Limitations Items in bold have changed since the printed bulletin. |
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| Emerged annuals | paraquat (GRAMOXONE INTEON 2L) |
0.68-1 | 2.5-4.0 pt |
Apply before crop emergence or after the last harvest after all spears have been removed. Include 1 pt NIS/100 gal. 6-day PHI. RUP. | ||||
| Preemergence annuals | diuron (KARMEX 80DF) |
0.8-3.0 | 1-4 lb |
Apply after mowing fern in spring and after harvest. Use low rate on sandy soil. Do not exceed 6 lb product/acre/year. Use low rate if in combination with Lorox, Sencor or Sinbar. 6-8 weeks residual activity. | ||||
| flumioxazin (CHATEAU 51WDG) |
0.192 | 6 oz |
Make one application at least 14 days before spear emergence. Good control of most annual broadleaves and grasses. 6-8 weeks of horseweed control. May cause some scoring of early spears after heavy rain. | |||||
| metrlbuzin (SENCOR 75DF) |
0.5-1.0 | 0.67-1.3 lb |
Apply after mowing fern in spring and after harvest. Do not exceed 2.6 lb product/acre/year. Good sandbur control. Use low rate if in combination with Karmex. 6-8 week residual activity. 14-day PHI. | |||||
| norflurazon (SOLICAM 80DF) |
2-4 | 2.5-5 lb |
Apply in fall after chopping fern or in spring before emergence. Use lower rate on coarse, sandy soil. Apply only once per season. Gives 1-2 months' residual activity. Suppresses nutsedge. 14-day PHI. | |||||
| s-metolachlor (DUAL MAGNUM 7.6E) |
1.26-1.9 | 1.33-2.0 pt |
Apply before asparagus and weeds emerge in spring. Needs moisture for activition. Suppresses grass, nutsedge, pigweeds. 16-day PHI. 1 application/crop. See: www.farmassist.com to obtain label. SLN label. | |||||
| sulfentrazone (SPARTAN 4F) |
0.14-0.375 | 4.5-12 fl oz |
Apply in spring before crop emerges. Use low rate on light soil. Do not use on soils with <1% OM. Maximum 12 oz product/acre in 1 application/year. 14-day PHI. | |||||
| terbacil (SINBAR 80W) |
0.5-1.2 | 0.62-1.5 lb |
Apply after mowing in spring. Do not use on light sandy soil. Do not exceed 1.5 lb product/acre/year. Do not plant other crops within 2 yr. of last application. 5-day PHI. | |||||
| Preemergence broadleaves, crabgrass | mesotrione (CALLISTO) |
0.094-0.241 | 3-7.7 fl oz |
Apply before spear emergence in sprint of after final harvest. Add COC or NIS to improve burndown of emerged weeds. Do not exceed 7.7 fl oz/acre/yr. A post harvest application may cause some fern bleaching. Controls most annual broadleaves. | ||||
| Postemergence broadleaves | 2,4-D amine salts (FORMULA 40 (3.8L)) |
1.4-1.9 | 1.5-2 qt |
Apply before, during or after the harvest season when weeds are growing rapidly. During harvest, spray soon after a pick to minimize crop injury. In fern, use drop nozzles. 3-day PHI. | ||||
| clopyralid (CLOPYR AG 3L) |
0.19-0.25 | 8-10.7 fl oz |
Apply before or during harvest. Maximum of 0.67 pt/acre/year. May cause some crooking of spears. Controls Canada thistle, marestail, mayweed, nightshade, plantain, smartweeds. Avoid application 2 years in succession. 2-day PHI. | |||||
| dicamba (BANVEL 4L) (CLARITY 4L) |
0.25-0.5 | 0.5-1 pt 0.5-1 pt |
Apply to actively growing weeds immediately after a harvest. Use high rate for control of perennial weeds. Apply in tank mix with 2,4 D or glyphosate for control of Canada thistle or field bindweed. Discard crooked spears at harvest. Do not exceed 1 pt/acre/year. 24-hr PHI. | |||||
| halosulfuron (SANDEA 75W) |
0.023-0.047 | 0.5-1 oz. |
Apply anytime during the season to kill nutsedge or broadleaves. Use drop nozzles in standing fern. Do not include NIS in spray mix during harvest. Maximum 2 oz/acre/year in 2 applications. 1-day PHI. | |||||
| linuron (LOROX 50DF) |
1-2 | 2-4 lb |
Apply before or after crop emergence. Use high rate preemergence. Do not exceed 4 lb ai/acre/year. 6 weeks residual activity. 1-day PHI. | |||||
| Postemergence grasses | clethodim (SELECT MAX 0.97E) |
0.068-0.12 | 9-16 fl oz |
Include 0.25% NIS/acre. Maximum of 64 fl oz/acre/yr. 1 day PHI. | ||||
| fluazifop-P (FUSILADE DX 2E) |
0.25-0.38 | 1-1.5 pt |
Apply to actively growing grasses. Include NIS or COC. Maximum 3 pt/acre/year. 1-day PHI. | |||||
| sethoxydim (POAST 1.5E) |
0.19-0.38 | 1-2 pt |
Apply to actively growing grasses. Include 1 qt COC in 20 gal water/acre. Maximum 5 pt and 2 applications/year. 1-day PHI. | |||||
| Emerged perennials, quackgrass, volunteer asparagus | glyphosate (ROUNDUP 4L) (TOUCHDOWN 4L) |
1-4 | 1-4 qt 1-4 qt |
PREEMERGENCE: Apply at least 7 days before asparagus emergence.
SPOT TREATMENT: Apply immediately after a clean harvest. Do not treat more than 10% of total field area. 5-day PHI. POSTHARVEST: Apply immediately after the last harvest and all spears have been removed. If spears regrow before application, allow fern to develop and apply as a shielded or directed spray. Do not allow herbicide to contact emerged spears or fern. |
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