Shieldex 400 SC

Manufacturer
Gowan
Category
Herbicides
Registered until
2025-12-31
Registration number
32943
Links

DIRECTIONS FOR USE


Product Specific Precautions:
Read and understand the entire label before opening this product. If you have questions, call the manufacturer at 877-706-4640 or obtain technical advice from the distributor or your provincial agricultural representative. Application of the specific product must meet and/or conform to the following:

General Use Information:
Shieldex 400SC Herbicide is a suspension concentrate for selective postemergence control of certain grass and broadleaf weeds in field corn, seed corn, sweet corn and popcorn. When applied postemergence, susceptible weeds uptake through treated foliage and cease growth soon after application. Complete death of weeds may take up to 2 weeks but will not compete with the growing crop.

Crop Tolerance
Shieldex 400SC Herbicide has exhibited excellent crop tolerance in development trials.
However, Shieldex 400SC Herbicide has not been tested on all inbred lines for tolerance. Contact your seed corn supplier for specific recommendations.

Cultivation
Avoid disturbing treated areas for at least 7 days after Shieldex 400 SC Herbicide application to allow maximum herbicide uptake and translocation. Avoid deep cultivation that will move dormant weed seeds into a zone where germination is likely. This is especially critical when tank mixing with a herbicide with soil residual activity.

Environmental Conditions and Biological Activity
Shieldex 400 SC Herbicide provides best results when applied to young, actively growing weeds. Applications made during warm, moist conditions (21°C or more) and adequate soil moisture both before and after application maximizes performance.
The degree and duration of control depend on spray coverage, weed spectrum, weed size, growing conditions before and after treatment and soil moisture.
Shieldex 400SC Herbicide is rainfast in 1 hour. Treating weeds that exceed maximum label height or that are under stress may result in incomplete control. Poor weed control or crop injury may result from applications made to plants under stress from:
 abnormally hot or cold weather
 environmental conditions such as drought, water-saturated soils, hail damage, or frost
 disease, insect, or nematode injury
 prior herbicide, or carryover from a previous year's herbicide application
If the corn or grass weeds are under stress, delay application until stress passes and both weeds and corn resume active growth.

Mixing and Loading Instructions:
Prepare no more spray mixture than is needed for the immediate application. Avoid the overnight storage of Shieldex 400SC Herbicide spray mixtures.
1. Ensure the spray system is free of residues from previous applications.
2. Fill the tank 1/2 full of clean water.
3. While agitating, add the required amount of Shieldex 400SC Herbicide.
4. Continue agitation until the Shieldex 400SC Herbicide is completely dispersed, at least
5 minutes.
Once the Shieldex 400SC Herbicide is fully dispersed, maintain agitation and continue filling tank with water. Thoroughly mix Shieldex 400SC Herbicide with water before adding any other material.
5. As the tank is filling, add the required spray adjuvants (methylated seed oil or ammonium nitrogen fertilizer).
6. If the mixture is not continuously agitated, settling will occur. If settling occurs, thoroughly re-agitate before using.
7. Avoid overnight storage of Shieldex 400SC Herbicide spray mixtures.
Field sprayer application: DO NOT apply during periods of dead calm. Avoid application of this product when winds are gusty. DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE S572.1) medium classification. Boom height must be 60 cm or less above the crop or ground.

DO NOT apply by air.
SPRAY ADDITIVES
To increase efficacy it is highly recommended to use an adjuvant when applying this product.

Adjuvant Selection
The use of MSO CONCENTRATE with Leci-Tech is recommended with Shieldex 400SC Herbicide.
Apply 1 % v/v or 10 L MSO CONCENTRATE per 1000 L of spray mixture.

Buffer zones:

Spot treatments using hand-held equipment DO NOT require a buffer zone.
The buffer zones specified in the table below are required between the point of direct application and the closest downwind edge of sensitive terrestrial habitats (such as grasslands, forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrublands) and sensitive freshwater habitats (such as lakes, rivers, sloughs, ponds, prairie potholes, creeks, marshes, streams, reservoirs and wetlands).

APPLICATION INFORMATION
Many crops are highly sensitive to Shieldex 400SC Herbicide. All direct or indirect contact (such as spray drift) with crops other than corn should be avoided.

Sprayer Preparation
Apply Shieldex 400SC Herbicide with spray equipment that has been cleaned and is free of pesticide deposits from previous pesticide use. Clean spray equipment according to manufacturer’s directions, see previous pesticide label for appropriate cleanup directions.
For all application systems, use 50-mesh or larger strainer screens.

Postemergence Weed Control
Applications for postemergence weed control should be made in 140 to 470 litres of water per hectare. Use the higher water volumes if vegetation or crop residue is present.
Best results are obtained when weeds are small and actively growing. Broadleaf weeds should be no larger than 10 centimeters and grasses should be no taller than 10 centimeters and prior to first tillering. Good coverage is essential to achieve optimum weed control. Higher spray volumes should be used under heavy weed populations or under adverse growing conditions.
Broadcast: Apply Shieldex 400SC Herbicide using conventional low-pressure ground spray equipment. Follow manufacture’s recommendation for spraying pressure and boom height. Check spray equipment daily for proper maintenance and calibration.
Shielded Sprayers: Shielding the boom or individual nozzles can reduce the effects of wind. However, it is the responsibility of the applicator to verify that the shields are preventing drift and not interfering with uniform deposition of the product.

Registered for culturesRate
Corn0.75 - 0.1 l
Sweet corn0.75 - 0.1 l
Winter wheat0.75 - 0.1 l
Winter rye0.75 - 0.1 l
Spring rye0.75 - 0.1 l
Alfalfa0.75 - 0.1 l
Beans0.75 - 0.1 l
Cabbages0.75 - 0.1 l
Cotton0.75 - 0.1 l
Spring oats0.75 - 0.1 l
Winter oats0.75 - 0.1 l
Peanuts0.75 - 0.1 l
Rice0.75 - 0.1 l
Potatoes0.75 - 0.1 l
Sorghum0.75 - 0.1 l
Soybeans0.75 - 0.1 l
Sunflowers0.75 - 0.1 l
Tomatoes0.75 - 0.1 l