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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
WATERMELON
| 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 | paraquat (GRAMOXONE MAX 3L) |
0.49 | 1.3 pt |
Apply before seeding or transplanting melons to kill emerged weeds. Include 1 pt NIS/100 gal. RUP | ||||
| Preemergence | 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) |
0.15-0.25 | 0.4-0.67 pt |
Apply to soil surface before transplanting or after seeding. Use low rate on coarse soils. 45-day PHI. | |||||
| ethalfluralin (CURBIT 3E) |
0.75-1.13 | 2-3 pt |
DIRECT-SEEDED MELONS: Use low rate on light, sandy soil. Apply to soil surface within 2 days of seeding. Do not incorporate. Needs 0.5 inch of rain or irrigation within 5 days to activate it. Heavy rainfall after application may cause crop injury. TRANSPLANTED MELONS: Apply to soil between rows of plastic mulch. Do not apply over or under row covers or plastic mulch. Do not spray over the top of transplants. | |||||
| 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. Use lower rate on light soil. | |||||
| naptalam (ALANAP 2L) |
3-4 | 6-8 qt |
PREEMERGENCE: Apply and incorporate before seeding or apply soon after seeding. Apply to moist soil or water in. Usually used in tank mix with Prefar. May be used under clear plastic. POSTEMERGENCE: Apply after transplanting or just before melons vine out. Controls several broadleaves. | |||||
| terbacil (SINBAR 80W) |
0.1-0.2 | 2-4 oz |
Apply before transplanting. May be applied under plastic mulch or to the row middles. Use low rate on sandy soils. For suppression of broadleaf weeds. Use with a preemergence grass herbicide. 70-day PHI. | |||||
| trifluralin (TREFLAN 4E) |
0.5-1 | 1-2 pt |
Direct the spray between rows when plants have 3-4 leaves. Cultivate shallowly to incorporate. Avoid contact with crop leaves. 60-day PHI. | |||||
| Preemergence and postemergence broadleaves | halosulfuron (SANDEA 75W) |
0.023-0.035 | 0.5-0.75 oz |
DIRECT SEEDED ON BARE GROUND: Apply after seeding but before soil cracking.
TRANSPLANTED ON PLASTIC MULTCH: Apply just befrore laying plastic. Wait 7 days to transplant. ROW MIDDLES: Apply to row middles as a directed spray. Avoid contact with crop. Do not exceed 2 oz/acre/year. 57 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. Do not exceed 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. | |||||
| Emerged perennials | glyphosate (ROUNDUP 4L) |
2-3 | 2-3 qt |
Apply to emerged perennials before planting the crop. Wait 3 days before planting. | ||||