What Herbicide to Use Post-Emergence on Soybeans? A Full Analysis of Herbicide Selection Techniques

After soybean seedlings emerge, there will be many weeds in the field, and weeds will affect the growth of soybean seedlings, so post-emergence weeding of soybeans is a relatively important step. So what herbicide should specifically be used post-emergence on soybeans?

1. Fluazifop-p-butyl

It belongs to the post-emergence selective foliar treatment herbicides and can be used in fields of many broadleaf crops, with a special effect on weed control. The specific dosage is: to control annual grass weeds at the 2-3 leaf stage, use 500-750 ml of 15% fluazifop-p-butyl per hectare; to control at the 4-5 leaf stage, use 750-1000 ml per hectare; to control at the 5-6 leaf stage, use 1000-1200 ml per hectare.

2. Quizalofop-p-ethyl

It belongs to low-toxicity herbicides and is suitable for grass weeds in broadleaf crop fields. The specific dosage is: to control annual grass weeds, use 50-70 ml of 5% quizalofop-p-ethyl emulsifiable concentrate per mu.

3. Clomazone (Command)

It belongs to the organic heterocyclic selective pre-emergence herbicides, and its control targets are barnyardgrass, crabgrass, green foxtail, yellow foxtail, etc. The specific dosage is: pre-emergence 140-150 g of 48% clomazone, or 60-70 g of 48% clomazone plus 70-80 g of 5% Doushile, etc.; post-emergence 60-70 g of 48% clomazone plus 70 ml of 5% Shabailing plus 17 ml of 24% Quangai, or 60-70 g of 48% clomazone plus 70 ml of 12.5% sethoxydim plus 17 ml of 24% Quangai, etc.

4. Bentazone

It belongs to the selective contact-type post-emergence herbicides, and its main control targets are broadleaf weeds and Cyperaceae weeds. For the specific dosage, refer to the instructions.

5. Chlorimuron-ethyl

It belongs to the selective pre-emergence and post-emergence herbicides, and is mainly used in soybean fields to control broadleaf weeds. For the specific dosage, see the instructions.

6. Fomesafen

It belongs to highly selective herbicides, and its main control targets are grass weeds and broadleaf weeds. The specific dosage is: when soybean seedlings have 1-3 compound leaves and weeds are at the 1-3 leaf stage, use 68-132 ml of 25% aqueous solution per mu, mix with 20-30 kg of water, and evenly spray the weed stems and leaves.