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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
CUCUMBER (Pickling or Slicing)
| 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 crop emergence | paraquat (GRAMOXONE MAX 3L) |
0.49 | 1.3 pt |
Apply before seeding or transplanting cucumbers to kill emerged weeds. Include 1 pt NIS/100 gal. RUP. | ||||
| Preemergence annuals | bensulide (PREFAR 4E) |
4-6 | 4-6 qt |
Apply and incorporate 0.5-1 inch before seeding or transplanting. Controls many annual grasses. May stunt crop if used under clear plastic. Usually used in tank mix with Alanap. | ||||
| clomazone (COMMAND 3ME) |
0.25-0.375 | 0.67-1 pt |
Apply to soil surface after seeding. If replanting after poor stand, do not reapply Command. Good control of velvetleaf. Observe rotational restrictions. Small grains are sensitive to carryover. 45-day PHI. | |||||
| ethalfluralin (CURBIT 3E) |
0.75-1.13 | 2-3 pt |
DIRECT-SEEDED CUCUMBERS. Use low rate on sandy soil. Apply to surface after seeding. Do not incorporate. Needs 0.5 inch of water within 5 days to activate it. Heavy rainfall may result in crop injury.
TRANSPLANTED CUCUMBERS: Apply to soil between rows of plastic mulch. Do not apply over or under hotcaps, row covers or plastic mulch. Do not apply over the top of transplants. |
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| ethalfluralin+ clomazone (STRATEGY 2.1L) |
0.6-1.2+ 0.19-0.375 |
3-6 pt |
Apply to soil surface after seeding, or as a banded spray between rows after transplanting. Needs 0.5 inch water within 2 days for activation. | |||||
| naptalam (ALANAP 2L) |
2-4 | 4-8 qt |
PREEMERGENCE: Apply and incorporate before seeding or apply soon after seeding. Apply to moist soil or water in. Tank mix with Prefar or Command. May be used under clear plastic.
POSTEMERGENCE: Apply after transplanting or just before cucumbers vine out. Controls several broadleaves. |
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| trifluralin (TREFLAN 4E) |
1-2 | 1-2 qt |
Direct the spray between rows of plants with 3-4 leaves. Cultivate shallowly to incorporate. Avoid contact with crop leaves. 30-day PHI. | |||||
| Preemergence and postemergence broadleaves | halosulfuron (SANDEA 75W) |
0.023-0.047 | 0.5-1 oz |
PREEMERGENCE: Apply after seeding but before cracking. Use low rate on light soils. Heavy rain and cool temperatures cause crop injury.
POSTEMERGENCE: Apply when crop has 3-5 leaves and before flowering. Include 0.25% NIS. Controls nutsedge. ROW MIDDLES: Apply to area between rows of plastic. UNDER PLASTIC: Apply just before laying plastic. Wait 7 days to plant. Use low rate. OVER PLASTIC: Use spot treatment for nutsedge control. Observe rotational restrictions. Carryover can injure sugarbeets. 30-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. Maximum 64 fl oz/acre/year. Include 0.25% NIS/acre. 14-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 3 pt/acre/season. 14-day PHI. | |||||
| Postemergence weeds | paraquat (GRAMOXONE MAX 3L) |
0.47 | 1.25 pt |
Use shields to protect crop. Apply in 20-30 gal water/acre. Do not exceed 30 PSI pressure. Do not allow spray to contact crop foliage. Maximum 3 applications per year. RUP. 8-day PHI. | ||||
| Emerged perennials | glyphosate (ROUNDUP 4L) |
2-3 | 2-3 qt |
Apply to emerged perennials before planting the crop. Wait 3 days before planting. | ||||