2,4-D LV4 Herbicide

When applying 2,4-D LV4 to corn to control postemergence annual broadleaf weeds, what is the recommended height of the corn plant to avoid late defoliation injury?

• Between 5 to 15 inches tall
• At the full tiller stage (4 to 8 inches high)
• Less than 8 inches tall ✓
• At the boot stage

Answer: Postemergence Annual broadleaf weeds; location: Outdoor; site: Corn; rate: 1/2; unit: pint; notes: Apply when corn is less than 8 inches tall, but avoid crop injury due to late defoliation.

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What is the minimum wind speed restriction for applying 2,4-D LV4 to prevent drift?

• Do not apply if wind speeds are greater than 5 mph ✓
• Do not apply if wind speeds are greater than 10 mph
• Do not apply if wind speeds are greater than 15 mph
• Do not apply if wind speeds are greater than 20 mph

Answer: Do not apply in windy conditions (> 5 mph) to prevent drift. / Do not apply when wind speeds are greater than 5 mph.

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For corn, what is the restriction regarding cultivation after treatment?

• Do not cultivate for 3 days after treatment
• Do not cultivate for a week to 10 days after treatment to avoid soil breakage ✓
• Do not cultivate for 14 days after treatment
• Do not cultivate for a week to 10 days after treatment

Answer: Do not cultivate a week to 10 days after treatment or soil breakage may occur.

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According to the mixing instructions, what is the correct procedure for preparing the mixing equipment?

• Fill equipment full, add product, then add water
• Fill equipment half full of water, agitate while adding product, then add the rest of water ✓
• Fill equipment one-third full of water, add product, then add the rest of water
• Mix product and water separately, then combine in the equipment

Answer: Mixing and dilution: Fill the mixing equipment half full of water, agitate while adding this product, then add the rest of water.

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If 2,4-D LV4 is applied to Grain Sorghum, what is the restriction regarding meat and dairy animals?

• Do not allow consumption for 7 days
• Do not allow consumption for 14 days
• Do not allow consumption for 30 days ✓
• Do not allow consumption for 60 days

Answer: Do not allow meat or dairy animals to consume treated crop for 30 days following application (Grain Sorghum).

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Which of the following is a required piece of Personal Protective Equipment (PPE) for this product?

• Nitrile rubber, viton, or barrier laminate gloves ✓
• Cotton gloves and long-sleeved shirt
• Chemical-resistant boots only
• Face shield and respirator

Answer: PPE: Wear long-sleeved shirt and long pants, chemical-resistant gloves made of neoprene, nitrile rubber, barrier laminate, or viton, and shoes plus socks.

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When treating small grains (not underseeded with legumes) for postemergence annual and biennial weeds, at what plant stage should the application occur?

• During the boot stage
• In the full tiller stage (4 to 8 inches high) but before boot stage ✓
• When grain is in the dough stage
• When weeds are in the bud stage

Answer: Postemergence Spring wheat, barley, and rye Annual and biennial weeds; location: Outdoor; site: Small Grains (Not underseeded with legumes); rate: 1/2 to 2; unit: pints; notes: Apply when grain is in full tiller stage (4 to 8 inches high) but before boot stage.

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When applying 2,4-D LV4 to soybeans for preplant annual and perennial broadleaf weeds, what is required to prevent severe injury?

• The application must be delayed 7 days after planting
• The application must be made at the boot stage
• The seed furrow must be completely closed ✓
• The application must be 1-1/2 to 2 inches deep

Answer: Preplant Annual and perennial broadleaf weeds; location: Outdoor; site: Soybeans; rate: 1 to 2.1; unit: pints; notes: Apply 1-1/2 to 2 inches deep. Seed furrow must be completely closed or severe injury will result.

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