What are the weed control methods for sesame during the seedling stage in summer?
How do you control weeds during the sesame seedling stage in summer? Here is an introduction. For weed control during the sesame seedling stage in summer, you can refer to the following methods: 1. Soil closure treatment after sowing and before emergence. After sowing sesame, apply 100 ml of 50% acetochlor emulsifiable concentrate or 200 ml of Dual (72% metolachlor emulsifiable concentrate) per mu, add 50 kg of water, and spray evenly. This can control foxtail grass, crabgrass, shortawn foxtail, goosegrass and many other annual grass weeds, and also has a certain effect on many broadleaf weeds propagated by small seeds. Keep the soil moist after application, and do not cultivate or loosen the soil within 50 days to avoid damaging the herbicide layer.
How do you control weeds during the sesame seedling stage in summer? Here is an introduction.
For weed control during the sesame seedling stage in summer, you can refer to the following methods:
1. Soil closure treatment after sowing and before emergence. After sowing sesame, apply 100 ml of 50% acetochlor emulsifiable concentrate or 200 ml of Dual (72% metolachlor emulsifiable concentrate) per mu, add 50 kg of water, and spray evenly. This can control foxtail grass, crabgrass, shortawn foxtail, goosegrass and many other annual grass weeds, and also has a certain effect on many broadleaf weeds propagated by small seeds. Keep the soil moist after application, and do not cultivate or loosen the soil within 50 days to avoid damaging the herbicide layer.
2. Skillfully use non-selective herbicides. Weeds in summer sesame fields generally emerge 3-10 days earlier than sesame and grow rapidly. You can make full use of the period before sesame emergence and use paraquat to control weeds that have already emerged, applying 200 ml of 20% paraquat aqueous solution per mu, add 40 kg of water, and spray. This herbicide is a contact non-selective herbicide. After application, it can be quickly absorbed by plant leaves, causing photosynthesis and chlorophyll synthesis to stop quickly. Leaves begin to change color 2-3 hours after contact with the herbicide, but it cannot translocate, so it can only damage the treated parts. Once the herbicide contacts the soil, it is inactivated and loses effect, with no residue, and has no effect on sesame emergence.
3. Use selective herbicides after emergence. After sesame emerges, when weeds are at the 2-3 leaf stage, apply 70-100 ml of quizalofop-p-ethyl (5% quizalofop-p-ethyl emulsifiable concentrate) or 50 ml of fluazifop-p-butyl (15% fluazifop-p-butyl emulsifiable concentrate) per mu, add 40 kg of water, and spray. After 4-5 days, weeds show poisoning symptoms such as yellowing heart leaves and browning internodes, and after 7-8 days the whole plant dies. It mainly controls wild oat, crabgrass, goosegrass, shortawn foxtail, foxtail grass, Chinese sprangletop and other annual grass weeds.
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