Perform soil treatment before sowing and rough leveling. For soil organic matter < 3%, use 80–110 mL of 48% EC per mu; for 3%–8% organic matter, use 130–160 mL per mu. Do not use in soil with > 8% organic matter. Maximum dosage must not exceed 200 mL/mu to avoid phytotoxicity to soybean roots and subsequent crops. Spray with 35 kg (South) or 50–70 kg (North) of water on the soil surface, harrow vertically to mix soil 1–3 cm deep (South) or 5–10 cm deep (North), suppress to preserve moisture, and sow after 1 day (South) or 5–7 days (North).
2
Cotton Fields
(1) After sowing and covering seedbeds: Use 75–100 mL of 48% EC per mu, spray water on the soil surface or seed covering soil evenly. (2) Live broadcast fields: After rough land preparation, use 150–200 mL of 48% EC per mu, spray soil surface, mix 2–3 cm soil immediately, and sow. (3) Mulch film cotton fields: Use 100–125 mL of 48% EC per mu, spray soil surface before sowing or after sowing prior to film covering.
3
Vegetable Fields
(1) Cruciferous: 3–7 days before sowing, use 100–150 mL of 48% EC per mu, spray soil surface, and mix 2–3 cm soil immediately. (2) Legumes: After sowing and before emergence, use 150–200 mL of 48% EC per mu, spray soil surface, and mix soil immediately. (3) Transplanted Crops: For eggplants, tomatoes, peppers, cabbage, cauliflower, etc., before weeds emerge post-transplanting, use 100–150 mL of 48% EC per mu, spray with water, and mix soil immediately.
4
Peanut & Sesame Fields
After rough land preparation, use 100–150 mL of 48% EC per mu, spray soil surface with water, mix 3–5 cm soil, and sow seeds after 5–7 days. For film-covered peanut fields, use 75–100 mL per mu 5–7 days before covering, spray seedbed, mix soil about 5 cm, and flatten the film.
5
Winter Rape Fields
Apply in the evening to increase soil absorption; soil mixing is not required. For direct-seeded fields, use 100 mL of 48% EC per mu after sowing. For transplanted fields, use 75 mL per mu in the evening after transplanting, spraying evenly on the soil surface.
6
Rice Fields
For dry water pipe fields and dry direct seeding fields, use 100 mL of 48% EC per mu 15–20 days before sowing, spray soil surface, and mix 2–3 cm soil. For transplanted rice fields, after seedlings turn green, apply 150–200 mL of 48% EC per mu mixed with fine soil and broadcast evenly.
7
Winter Wheat Fields
Before pouring ice water, use 150–200 mL of 48% EC per mu, and spray or sprinkle as poisonous soil mix.
8
Watermelon Fields
Use 120–150 mL of 48% EC per mu before transplanting, spray soil surface with water, and mix 3 cm soil. For mulched watermelon fields, use 75–100 mL per mu after applying medicine. Note: Watermelon beds cannot be treated directly.
9
Sweet Potato Fields
After raising ridges, use 100–120 mL of 48% EC per mu, spray soil surface with water, cover with loose soil, insert potato seedlings, and water. If temperatures exceed 30°C during application, lower dosage to under 100 mL.
10
Orchards & Mulberry Orchards
Before weeds emerge, use 150–200 mL of 48% EC per mu, spraying the soil surface with water to create a sealed soil barrier.
11
Alfalfa Habitat
Mainly used for planting alfalfa habitat. When locusts are dormant or newly injured, use 130–150 mL of 48% EC per mu, spray with water, and mix soil with a spring-tooth rake or rotary hoe to minimize mechanical damage to rhizomes. For reseeding fields, use 100–120 mL per mu, spray soil surface, mix soil promptly, and sow after 5–7 days.
Frequently Asked Questions (FAQ)
What is the maximum allowable dosage of Trifluralin in soybean fields?
The maximum dosage per mu should not exceed 200 mL of 48% EC. Exceeding this amount may cause severe phytotoxicity to soybean roots and adversely affect subsequent crops.
Can Trifluralin be used in soil with high organic matter content (> 8%)?
No, Trifluralin should not be used in fields with a soil organic matter content exceeding 8%, as high organic content binds the active ingredient, reducing efficacy or requiring unsafe application rates.
Is soil incorporation necessary when applying Trifluralin to winter rape fields?
No, soil incorporation is not required for winter rape fields. Pesticides should preferably be applied in the evening to optimize soil absorption naturally.
How should dosage be adjusted for sweet potato fields in high temperatures?
If temperatures exceed 30°C during application in sweet potato fields, the dosage of 48% EC should be reduced to less than 100 mL per mu to prevent crop injury.
When should Trifluralin be applied in transplanted vegetable fields?
In fields transplanted with eggplants, tomatoes, peppers, cabbage, or cauliflower, apply 100–150 mL of 48% EC per mu after transplanting but before weeds emerge, followed by immediate soil incorporation.
How long should I wait to sow seeds after soil incorporation in peanut and sesame fields?
After applying 100–150 mL of 48% EC per mu and mixing into 3–5 cm of soil, you should wait 5 to 7 days before sowing the seeds.