There are many weeds in sesame fields in summer, how to use herbicides in sesame fields in summer?

Sesame in the seedling stage of the root system is shallow, the ability to absorb water and fertilizer is very weak, the ability to degrade drugs is also very weak, such as the use of herbicides in excess, will cause irreparable losses, it is difficult to appear corn or wheat self-recovery phenomenon, which requires the use of sesame field herbicides must be more accurate and precise. If it is pre-seedling weeding, you can use 100-120 ml of 48 fluoralin EC before sesame sowing, mixed with 80-100 kg of water and spray on the surface of the soil. It is best to wait for three days after spraying to sow sesame seeds.

If it is after sowing, then 50-75 ml of 50% acetochlor can be used mu. Sesame seeds whose stems and leaves have grown to 20 cm can be selected with highly selective, systemic conductive post-bud herbicides, which are quickly absorbed and conducted by weed leaves after application, and the herbicides sprayed into the soil can also be absorbed to kill herbs, which can control a variety of annual and perennial grasses. The main agents are Gaicao Neng, Shuletong and so on.

Sesame seeds are broad-leaved and can only be treated with herbicides for coniferous species. Nowadays, there are many names of herbicides on the market, and due to different climates, soils and rainfall, the herbicides applied will be a little different, and you don't know which region you belong to. Sesame, sweet potato, soybean, cotton, peanuts, etc. are broad-leaved crops, weeding selection mainly depends on the type of weeds and flexible use, Hekuo weeds are often used in combination agent Hekuo double hoe, if broad-leaved weeds are the main choice, the use of Kekole, the temperature is high in summer, must be used at low concentration, morning and evening medication, to avoid burning leaves, it is recommended to add safety additives to use.

In general, black sesame seeds are the highest, followed by white sesame seeds, and brown sesame seeds are the lowest. The yield per mu of sesame seeds is not mu, under general planting technology, ordinary soil, and ordinary growth conditions, black sesame seeds are 140 180 kg per mu, white sesame seeds are 120 160 kg per mu, and brown sesame seeds are 110 150 kg per mu. Of course, the planting technology is good, the fertilizer is sufficient, the soil quality is good, and the yield can be improved; If it is not well managed, the yield will be lower.

According to the growth habit of sesame seeds, the leaves are slender and grow upwards in a single rod, and some herbicides for the page effect can be sprayed to remove low bushy weeds, and both coniferous and broad-leaved herbicides can be sprayed, and the herbicide is best sprayed after the sesame plants have grown.

It is necessary to carry out soil containment treatments, and some biocidal herbicides must be used, and the herbicides must be in the right place when spraying.

Use with caution and be cautious when using herbicides to prevent injury to sesame seedlings.

1. Soil closure treatment before seedling after sowing. After sesame seeding, 100 ml of 50% acetochlor EC or 200 ml of Dool (72% metolachlor EC) plus 50 kg of water are evenly sprayed per mu, which can control a variety of annual gramineous weeds such as dogtail grass, Ma Tang, Kanmai Niang, cow tendon grass, etc., and also has a certain control effect on broad-leaved weeds propagated by a variety of small seeds. Keep the soil moist after the medicine, and it is not advisable to cultivate the loose soil within 50 days, so as not to damage the soil layer.

2. Skillful use of biocidal herbicides. Summer sesame field weeds generally emerge 3-10 days earlier than sesame seeds, and grow rapidly, can make full use of the period before sesame seedlings, the use of paraquat to control unearthed weeds, spray with 200 ml of 20% paraquat water agent and 40 kg of water per mu. The drug is a contact type of herbicide, after the drug can be quickly absorbed by the plant leaves, so that photosynthesis and chlorophyll synthesis will be terminated soon, the leaves will begin to change color 2-3 hours after the drug, but can not be conducted, so only the drug can be partially damaged.

The drug is passivated and invalid when in contact with the soil, and there is no residue and no effect on the emergence of sesame seeds.

3. Use selective herbicides after seedlings. After the emergence of sesame seeds, at the 2-3 leaf stage of weeds, 70-100 ml of Jinghe grass gram (5% Jingquoxalin EC) or 50 ml of Jingwen (15% Jingpiflu Grass EC) can be sprayed with 40 kg of water per mu. 4-5 days after the drug weeds appear heart leaves yellow, internode browning poisoning symptoms, 7-8 days after the whole plant died, mainly to control wild oats, horse, cow tendon grass, Kanmai Niang, dogtail grass, gold and other annual grass weeds.

(1) 48% fluorining EC is a selective pre-sowing soil treatment herbicide, which has a long effective period in the field and is safe for sesame, and can basically control the weed damage of sesame in the whole growth period of sesame seeds after one application; It can be used to control annual gramineous weeds, seed-propagated perennial weeds and some broad-leaved weeds, such as barnyard grass, wild oats, horsetail, wolf's tail grass, bone-seeking wind, grassland grass, mango wheat, purslane, quinoa, nepeta, piglete.

Thirty-five days before sesame sowing, 80,100 ml per mu of 48% fluorinalin EC was used for fields with low sand and organic matter content, and 100,150 ml per mu was used for fields with high clay and organic matter content. 3050 liters of water are manually sprayed per acre, more than 13 liters of tractor, evenly sprayed on the soil surface. After application, the soil is raked in time and mixed to a depth of 35cm, and the soil moisture is inhibited in drought.

Not a single crop of sorghum and millet can be planted in arid areas.

2) 72% metolachlor EC, pre-bud selective soil treatment herbicide, can control barnyard grass, tiger tail, wolf tail grass, grass grass early maturing grass, wild millet, teff, ryegrass, millet, sinewbone grass, elephant grass, camellia, small leaf sesame, Roche grass, purple stem Zeiza and water.

After sowing and before seedlings, apply 130,220 ml of 72% metolachlor EC per mu (130,180 ml for loam, 180,220 ml for clay). 3040 liters of water per mu are sprayed manually, and 13 tractors are used. More than 3 liters, spray evenly on the soil surface.

When the soil moisture is high, it is conducive to the exertion of the effect. The field duration of metolachlor is 5070 days, which is safe for sesame and stubble crops.

3) 48% alachlor EC is a selective pre-bud herbicide, which can control barnyard grass, horsetail, autumn millet, dogtail grass, almond, duck plant, dodder seed, amaranth, quinoa, quinoa, willow, pepper grass, hollow lotus grass, nightshade, etc. After sowing and before sowing, sesame seeds were applied with 150,250 ml of 48% EC, 250,300 ml of loam and 300,400 ml of clay per mu.

3050 liters of water per acre are manually sprayed on the soil surface. When the soil moisture content is good, it is conducive to the efficacy of the medicine. If there is no rain in the drought, it can be applied before sowing and the soil is lightly mixed to a depth of 35 cm.

The mixed dosage per mu is: 100 ml of 48% alachlor EC plus 100 grams of 20% diuron wettable powder; 100 ml of 48% alachlor EC and 100 g of 25% green melon wettable powder.

It is safe for the next crop.

Sesame ground is weeded with herbicides such as Doer emulsifiable concentrate, Lasso emulsifiable concentrate, and high-efficiency caedo-neng emulsifiable concentrate. Within 3 days after sesame seeding, spray with 200-250 ml of 48% Lasso EC or 100 ml of 72% Dohr EC per mu, mixed with 40-50 kg of water. After the emergence of weeding, generally with 20-30 ml of high-efficiency mulberry emulsifiable concentrate per mu, diluted with 50 kg of water and sprayed.

Strictly control the dosage of medication.

At present, there are many types of herbicides in corn fields, the content of active ingredients is different, and the amount of use is also different. When using, we must strictly control the dosage, and avoid using too much or too little, not only to ensure the weeding effect, but also not to affect the growth of corn and crops. The dosage of pesticides should be appropriately increased in high wheat stubble fields.

For mechanically harvested wheat fields, wheat straw and wheat bran should be cleaned up in the field first, and the dosage of pesticides should be increased appropriately. Generally, the recommended minimum dosage can be grasped for flat wheat stubble, and the recommended maximum dosage can be mastered for high wheat stubble. Do not increase the dosage of pesticides at will, so as not to affect the growth of corn and crops.

Glyphosate. In the case of wasteland or pre-sowing and post-harvest arthropod control, the systemic conductive broad-spectrum herbicide glyphosate can be used. Before the sowing of glyphosate, the weeds such as tea gardens, orchards, field edges and fields to be sown are vigorously growing, and 10% kilograms of glyphosate water agent are used per mu to spray stems and leaves with 30 40 kg of water.

In short, arthrodium is a grass weed, which can be controlled with selective herbicides such as quinoxalin, and can also be controlled with non-selective glyphosate herbicides, and the effect is very good.

In sesame fields, grasses can be removed with quinoxalin, flupyrimethoxalin, pyflufenoxalin, etc., and broad-leaved weeds can only be pulled. It should also be noted that it is safer to use the medicine after the sesame seeds grow a pair of true leaves. In the late Qing Dynasty, we had exported the sesame oil to Europe, but unfortunately the yield of the original variety was low, and now we have changed to sesame seeds with white grains, and we can no longer find the original taste.