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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
CARROT
| 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 annuals | linuron (LOROX 50DF) |
0.5-1 | 1-2 lb |
PREEMERGENCE: Apply after seeding but before carrots emerge. Use low rate on light soils, and increase rate on soil containing more clay or organic matter. | ||||
| pendimethalin (PROWL H20 3.8 ACS) |
0.95 | 2.0 pt |
Apply after seeding as a broadcast treatment or at layby as a directed spray. Plant barley cover crop 7 days before application. Needs water for activation. 60 day PHI. | |||||
| s-metolachlor (DUAL MAGNUM 7.6E) |
0.48-1.9 | 0.5-2.0 pt |
Mineral soil: 0.5-1 pt/acre. Muck soil: 1.3-2 pt/acre. Apply after seeding and before carrots emerge. One application per crop. 5 days after seeding barley before application. See: www.farmassist.com to obtain label. SLN label. | |||||
| trifluralin | 0.5-1 | 1-2 pt | Mineral soil only. Apply before planting and incorporate 2-3 inches soon after spraying. Use low rate on sandy soils. | |||||
| Postemergence broadleaves | linuron (LOROX 50DF) |
0.75-1 | 1.5-2 lb |
POSTEMERGENCE: Broadcast after carrots are 3 inches high. Do not apply when temperature is above 85 F. Do not apply at pressure above 40 PSI. Do not mix with other pesticides or surfactants. Do not apply within 14 days of any other pesticides when carrots are under stress. Do not exceed 2 lb ai/acre/year pre- and postemergence. 14-day PHI. | ||||
| metrlbuzin (SENCOR 75DF) |
0.25 | 0.33 lb |
Broadcast when carrots have 5-6 leaves. Do not apply during cool, cloudy weather or when temperature is above 85 F. Do not mix with other chemicals. Do not apply within 14 days of any other pesticides when carrots are under stress. Do not apply more than once per season. 60-day PHI. | |||||
| 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. 30-day PHI. | ||||
| fluazifop-P (FUSILADE DX 2E) |
0.16-0.19 | 10-12 fl oz |
Apply to actively growing grasses. Do not apply more than 6 pt/acre/year. Include 1 qt COC or 1 pt NIS/acre. 45-day PHI. | |||||
| sethoxydim (POAST 1.5E) |
0.19-0.47 | 1-2.5 pt |
Apply to actively growing grasses. Include 1 qt COC/acre. Maximum total of 5 pt/acre. 30-day PHI. | |||||
| Postemergence perennials | glyphosate (ROUNDUP 4L) |
2-3 | 2-3 qt |
Apply to emerged weeds before planting in the spring or after harvest in the fall. Apply between carrot rows as shielded or wiper application. 14-day PHI. | ||||