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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
ONION, SHALLOT, DRY BULB (Seeded, Sets, Transplants)
| 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 weeds before planting | glyphosate (ROUNDUP 4L) |
2-3 | 2-3 qt |
Apply before planting in the spring or after harvest in the fall. Kills carrots and potatoes. | ||||
| paraquat (GRAMOXONE MAX 3L) |
0.56-1 | 1.5-2.7 pt |
Apply before or after seeding but before crop emerges. Include 1 pt NIS/100 gal. Kills small grains planted for windbreak and any emerged crop plants. 60-day PHI. RUP. | |||||
| Preemergence annuals | flumioxazin (CHATEAU 51WDG) |
0.032-0.064 | 1-2 oz |
Apply to 3-6 leaf onions. Do not tank mix with other herbicides or adjuvants. Maximum of 3 oz/acre/year. Controls nightshades, groundsel, mustards. 45 day PHI. | ||||
| pendimethalin (PROWL H20 3.8 ACS) |
0.7-1.9 | 0.75-2 qt |
MUCK SOIL: Apply 2 qt/acre preemergence or at transplanting and after the 2-leaf stage. Make third application at the 6- to 9- leaf stage. Pack soil well over the row. Wait 5 days after seeding barley to apply. Maximum total of 6.3 qt/acre/year.
MINERAL SOIL: Apply 1.5-3 pt/acre to onions with 2-9 leaves. Maximum 3.2 pt/acre/year. 45-day PHI. |
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| Preemergence annuals, yellow nutsedge | dimethenamid-P (OUTLOOK 6E) |
0.56-0.98 | 12-21 fl oz |
Apply after onion 2-leaf stage. Apply to transplanted onions after soil is settled around plants. On muck soil use full rate. One application/year. 30 day PHI. | ||||
| s-metolachlor (DUAL MAGNUM 7.6E) |
0.63-1.26 | 0.67-1.33 pt |
Apply after 2-leaf stage of onions. On muck soils,make second application 3-4 weeks after first. 60-day PHI. See: www.farmassist.com to obtain label. SLN label. | |||||
| Postemergence broadleaves | bromoxynil (BUCTRIL 4EC) |
0.13-0.25 | 0.25-0.5 pt |
Apply before onions emerge or to onions with 2-5 leaves. Application to younger or older onions may cause crop injury. Apply in a minimum of 50 gal water/acre, after 2 sunny days, when soil and onion leaves are dry and temperature is 70-80 F to avoid crop injury. Controls mustards, lambsquarters and smartweed. | ||||
| ethofumesate (NORTRON 4SC) |
0.5 | 1 pt |
Apply to small broadleaves and nutsedge. Maximum 4 applications/year. Controls chickweed, nightshades, pigweed, nutsedge. 30-day PHI. | |||||
| fluroxypyr (STARANE ULTRA 2.8 L) |
0.123 | 0.35 pt |
Apply to onions with 2-6 leaves. Maximum of 2 applications per season. Controls volunteer potato, chickweed, composites, nightshades, mustards. SLN. | |||||
| oxyfluorfen (GOALTENDER 4SC) |
0.031-0.125 | 1-4 fl oz |
TRANSPLANTS: Apply 0.5 pt within 2 days of transplanting for PRE control.
DRY ONIONS: Apply as broadcast during sunny weather after onion 2-leaf stage. Use high rate for large weeds. Do not exceed 1 pt/acre/year. 45-day PHI. |
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| Postemergence grasses | clethodim (SELECT MAX 0.97E) |
0.068-0.12 | 9-16 fl oz |
Apply to actively growing grasses. Include 0.25% NIS/acre. Maximum 64 fl oz/acre/year. 45-day PHI. | ||||
| fluazifop-P (FUSILADE DX 2E) |
0.16-0.19 | 10-12 fl oz |
Apply to small, actively growing grasses. Include 1 qt COC or 1 pt NIS/acre. 45-day PHI. | |||||
| sethoxydim (POAST 1.5E) |
0.19-0.28 | 1-1.5 pt |
Apply to actively growing grasses. Include 1 qt COC/acre. Maximum total of 4.5 pt/acre. 30-day PHI. | |||||
ONION, GREEN
| 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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| Preemergence | dimethenamid-P (OUTLOOK 6E) |
0.65-0.98 | 14-21 fl oz |
Apply after the 2 leaf stage of seeded onions. Use lower rate on light soil. 30 day PHI. | ||||
| s-metolachlor (DUAL MAGNUM 7.6E) |
0.63-1.26 | 0.67-1.33 pt |
Apply at the onion 2-leaf stage. Use lowest rate on light sandy soils. No effect on emerged weeds. 21-day PHI. See: www.farmassist.com to obtain label. | |||||
| Postemergence grasses | sethoxydim (POAST 1.5E) |
0.19-0.28 | 1-1.5 pt |
Apply to actively growing grasses. Include 1 qt COC per acre. Maximum total of 4.5 pt/acre. 30-day PHI. | ||||