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Emergency Use Registration extended: Command herbicide for field cucumbers, squash, melons and processing pumpkins

Author: Leslie Huffman - Weed Management Specialist/OMAFRA
Creation Date: 16 May 2006
Last Reviewed: 21 April 2008

 

Addition to Chapter 4, Publication 75, Guide to Weed Control, Order this publication
Trade Names Command 360 ME
Active Ingredient clomazone
Formulation ME (microencapsulated) liquid
Guaranteed active concentration 360 g/L
Groups  1
Ontario Schedule 2
Winter Storage A
Chemical Family Aryloxyphenoxypropionate
Crop and/or Non-Crop Registrations Emergency use: Field cucumbers, squash, melons and processing pumpkins. Other crops: Soybeans.
Rate

Field cucumbers, squash and processing pumpkins:
0.78 to 1.17 L/ha
0.31 to 0.46 L/ac
280 to 421 g/ha (active ingredient)
Use the lower recommended rate on coarse (sandy loam) soils and the higher recommended rate on fine (silty or clay loam) soils.

Melons (muskmelon and watermelon):
0.78 L/ha
0.31 L/ac
280 g/ha (active ingredient)

Apply in 95 L water/ha as a PRE treatment after the crop is seeded, and prior to crop emergence.
Sensitive Weeds Lamb's-quarters (including triazine tolerant), velvetleaf, and barnyard grass (in medium textured soil only), Eastern black nightshade, lady's-thumb, green and yellow foxtail, suppression of redroot pigweed, common ragweed
Uptake and Translocation Readily absorbed by roots and emerging shoots, and translocated in the xylem to foliage.
Basis of Selectivity  Susceptible species emerge from the soil bleached white, and become necrotic after several days. Blocks chlorophyll metabolism.
Application Methods Preemergence, before crop or weed emergence. Apply after seeding and before crop emerges. Use the lower recommended rate on coarse (sandy loam) soils, and the higher recommended rate on fine (silt, clay, clay loam) soils. Apply in 95 L water/ha.
Residual Activity

Whean applied at reccommended rates, Command 360 ME will provide season long weed control. It is relatively immobile in soil and microbial decomposition is the principle path of dissipation. Some rotational restrictions apply, refer to tables 4-3 and 4-4 for more information. Soil texture impacts residual and product efficacy, see product label for appropriate rates.

Re-Cropping Guidelines: Observe these plant back intervals before the following rotational crop:
Following Spring: Soybeans, White Beans, Kidney Beans, Snap Beans, Canola (spring), Corn (Field and Sweet), Peas, Peppers (transplant, plugs), Broccoli (transplant, plugs), Cucumbers, Pumpkins, Squash and Potatoes
16 months: All other crops (i.e. Winter Wheat, Spring Cereals)
Unique Characteristics

Avoid off-target drift to prevent foliar damage to neighbouring vegetation. Cherry, willow, raspberry, grapes, and roses are extremely sensitive and many other species are sensitive.
Emergency registration expires August 31, 2008.
Precautions

Temporary whitening and/or yellowing of the crop may occur when emerging from the treated soil.
Do NOT make more than one application per season.
Do NOT incorporate.
Do NOT apply within 45 days to harvest.
Do NOT apply to sandy soil.
Do NOT re-enter treated area for 12 hours after treatment.
Do NOT allow livestock to graze on treated vines.
Do NOT use on Jack-o-lantern pumpkins.

All crops:
Off-target drift will cause severe damage to susceptible plants:
Do NOT exceed a spray pressure of 207 Kpa (30 P.S.I) or consider using low drift nozzles.
Apply when temperatures are below 25 C.
Do NOT apply when winds are dead calm or gusty and exceed 16 km/hr.
Use a 90 to 370 metre buffer zone from sensitive areas.
Do NOT apply more than one application per season.
Do NOT apply by air - ground equipment only.
Do NOT apply to muck or soils > 10% organic matter.
Incorporate manure at least 10-15 cm before application.
Manufacturer / Registrant United Agri Products

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