Are herbicides special for green onions harmful to green onions

No, not if it's a profession.

Green onions can be used as a herbicide for weeding.

Pendimethalin EC, ethoxyfluorfen EC, and green onion grass are cleaned all over again. The main weeds in the green onion field are Po Po Na, Ma Tang, and Purslane.

Li, Raercai, small spinning flowers, pig suffering, dogtail grass.

These eight weeds accounted for 87% of the total number of weeds in the green onion field, and were the dominant weeds. Due to the mixture of gramineous weeds and dicotyledon weeds, chemical weeding should be adapted to local conditions, and different herbicides should be used in different growth stages of green onions.

1. Soil treatment after sowing and before emergence. Post-sowing pre-emergence chemical weeding is a ground pesticide application technique carried out after the green onion is sown and the weeds are not unearthed before the green onion is unearthed. The herbicide used prevents weeds from emerging and kills them, with little or no harm to the green onion seedlings.

33% pendimethalin EC 100 150 ml per mu can be sprayed on the ground with 45 60 kg of water, and then watered after application (first application and then watering can enhance the adsorption of the soil to the agent and reduce the damage); Or spray the soil with 75 100 grams of 50% promethonet wettable powder per mu and 45 kg of water.

2. After the green onion emerges, the stems and leaves are treated. After sowing, the pesticide treatment before seedlings is generally effective for 30 to 50 days, after which there are still some weeds breeding, therefore, green onions still need to be used again after seedlings emerge, and the stems and leaves are treated. Usually in the 3 4 leaf stage of green onions or after transplanting, spray with 33% pendimethalin EC 100 150 ml to 45 60 kg of water, or 24% ethoxyfluorfen emulsifiable concentrate 66 72 ml per mu to 45 kg of water, or 100 ml of new green onion herbicide 100 ml per mu to spray 60 kg of water, which can control 1-year-old gramineous weeds and some broad-leaved weeds in the field.

It is reported that green onion herbicides include pendimethalin, promethoxin wettable powder, ethoxyflufen emulsifiable concentrate, imidacloprid wettable powder, avermectin emulsifiable concentrate, dioxazil emulsifiable concentrate, etc. Different agents are used for different times, so it is necessary to operate according to the instructions to avoid drug damage.

When herbicides were sprayed during the transplanting period of green onions and before weed seedlings, pendimethalin single agent had a good control effect on gramineous weeds and poor control effect on broad-leaved weeds. Acetochlor single dose and meolachlor single dose have certain control effects on gramineous weeds and broad-leaved weeds, but the effect is average. The mixture of pendimethalin with ethoxyfluorfen and capryloylbromobenzonitrile can effectively control gramineous weeds and broad-leaved weeds, among which the low-dose mixture of pendimethalin and ethoxyfluoride has the best control effect on weeds. Herbicides were sprayed at the growth stage of green onions and the 3-leaf stage of weeds, and the control effect of quinoxalin single agent was better, but the control effect of broad-leaved weeds was poor. The mixture of quinoxalin and capryloyl bromobenzonitrile had poor control effect on broad-leaved weeds.

After onion colonization: After onion colonization, use ethoxyfluorfen emulsifiable concentrate or pendimethalin emulsifiable concentrate in the green onion ditch. There are 1-year-old grasses that can be used with quinoxalin EC or high-efficiency flupyromethane EC. Broadleaf weeds are generally uprooted manually.

The types of herbicides used for green onions are related to the growth period of green onions, and the commonly used methods are: 1. Soil sealing before sowing and planting: 100-120 ml mu of 48ec cable.

2. Post-sowing and pre-seedling soil treatment: 33EC field capture 100-150 ml mu. 3. After planting seedlings (more than four leaves) stem and leaf treatment, 24EC fruit 65-68 ml mu.

The types of herbicides used in green onion fields are related to the growth period of green onions, and the soil is closed before sowing and planting: 100-120 ml of 48ec Lasso.

For weeding of green onions, pendimethalin and other herbicides with good control effect on gramineous weeds are mainly used, but there is a lack of effective control measures for broadleaf weeds.

With 330 g L pendimethalin 2250 ml ha + 24% ethoxyflufen EC 300 ml ha on total grass control effect, it can be used for green onion field closed weeding, the effect is ideal.

Quinoxalin 675 ml ha + 24% ethoxyfluorfen 900 ml ha, 10% quinoxalin 675 ml ha + 30% capryloyl bromobenzonitrile 1200 ml ha + 24% ethoxyfluoroxaether 750 ml hectares are used for weed control at the seedling stage of green onion fields, which can achieve one-time control of broad-leaved and grassy weeds without affecting the growth and final yield of green onions. Therefore, the above several pesticides can be used to compound the weeding of green onion fields.

Precautions for green onion planting.

It is important to pay special attention to the seedbed in the summer. In the summer, the nursery is in a period of high temperature and rain, so it is necessary to strengthen the management of this time; Before the seedlings emerge after the completion of sowing, an average of 33% of 100ml spray is used to seal the soil every 667 square meters, during which it is combined with manual weeding about 2 3 times.

If you choose the way to go to the market, you can be a little denser, the distance between each row is 60 70cm, and the distance between each plant is about 3 4cm, if you want to wait for the green onion to be listed, you need to be about 80cm per row, and let each plant be about 5cm.

Green onions can be weeded with imidacloprid wettable powder.

At the peak of nymph occurrence, spray 10% imidacloprid wettable powder 2 000 2 500 times, spray once every 7 l0 d, and control 2 3 times continuously. In the early stage of adult occurrence and larval leaf larvae, 2 000 3 000 times of % avermectin emulsifiable concentrate was used.

Ditch Tibetan Method:

After the green onions are harvested, they are dried for several hours, the root soil is knocked out, the diseased and injured plants are removed, and then the onions are bundled. Each bundle weighs 25-30 pounds and is stored in a well-ventilated place for 5-7 days to fully dry the moisture on the surface of the green onion.

At the same time of drying the surface moisture of green onions, choose a place with leeward and sunny direction to open a ditch, a deep ruler, a ditch distance ruler, fill the bottom of the foot with moisture, and then plant the green onions into the ditch one by one;

The bundle of leaves is covered on the upper part of the front bundle in turn, and a 1-foot corn stalk is skewept around the onion bundle to facilitate ventilation and heat dissipation, and the white part of the onion is buried with soil. Before the cold snap arrives, a straw curtain or corn stalk can be lightly covered.

As far as I know, there are no good pesticides at present, which can meet your requirements, most of them still use manual methods, in fact, the money you buy pesticides is put on hired workers, in fact, it is almost the same!

It's best not to use it if you eat it yourself, isn't it about environmental protection now, you might as well pull the grass by hand, and the grass can also be used to give chickens or free children to eat,

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Before the emergence of green onion after sowing, herbicides such as promethoxin and field supplement can be used for soil sealing treatment, and 180 grams of 25% promethonet wettable powder or 33% pendimethalin emulsifiable concentrate (field supplement, weeding) 150 grams per mu can be sprayed with 50 kg of water. Before seedlings or transplanting of green onions after sowing, 150-200 grams of 50% isoproturon wettable powder per mu and 50 kg of water can be used to control grasses and some broad-leaved weeds. At the 2-3 leaf stage of green onions or after transplanting, 66-72 ml of 24% fruit emulsifiable concentrate per mu and 40 kg of water can be used to control grasses, sedges and broad-leaved weeds in the field.

Green onions can not be used before the 2-leaf period, and the soil surface is required to be moist and avoid the strong light period. Brown spots may appear on the green onion leaves after medication, which generally disappear after 5 days and do not affect future growth.

<> post-seedling herbicides for green onions include 5% quinoxalin EC, high-efficiency flupyrimethalin EC, 12% clethoxone EC, 48% herbicide pine water agent, 24% ethoxyfluorfen EC, 24% ethoxyfluorfen + 10% quinoxalin, 10% quinoxalin + 30% capryloyl bromobenzonitrile + 24% ethoxyfluorfen, etc.

1. Stem and leaf treatment (post-emergence weeding).

1. If it is for the prevention and control of annual grass weeds, use 50-90ml of 5% quinoxalin emulsifiable concentrate, or 30-40ml of high-efficiency flupyromethane sensitive emulsifiable concentrate, or 30-40ml of 12% cletholate emulsifiable concentrate diluted with water and sprayed evenly (low amount is used when the weed leaf age is small, and high amount is used when the weed leaf age is large).

2. If it is for the prevention and control of annual broad-leaved weeds or sedges such as fragrant aconite, use 150-200ml of 48% herbicidal pine water agent diluted with water per mu and sprayed evenly.

3. After the 3-4 leaf stage or transplanting of green onions, use 66-72ml of 24 ethoxyfluorfen emulsifiable concentrate mixed with water and 45kg dilution spray per mu to prevent and remove annual gramineous weeds and broad-leaved weeds in the field.

4. After the green onion seedlings are slowly turned green, use 20ml of quinoxalin EC or high-efficiency flupyromethane EC diluted with water per mu to prevent and control annual grass weeds, if there are 4-6 leaves of grass in the seedbed, it should be manually pulled out in time.

5. In the green onion field, at the weed seedling stage, use 60ml of 24% ethoxyfluorfen + 45ml of 10% quinoxamine diluted spray with water per mu, or use 45ml of 10% quinoxaline + 80ml of 30% capryloyl bromobenzonitrile + 50ml of 24% ethoxyfluorfen dilution spray with water per mu to control broad-leaved weeds and gramineous weeds.

2. Soil treatment (pre-emergence weeding).

1. For plots with gramineous weeds as the dominant population, use 150-200ml of 72% metolachlor EC, or 60-80ml of 96% refined metolachlor EC, or 130-150ml of 33% pendimethalin EC diluted with water per mu before transplanting.

2. For mixed plots of gramineous weeds and broad-leaved weeds, use 150-200ml of 48% methyl grass and atrazine suspension emulsion diluted with water per mu.

3. Before sowing, use 180g of 25% promethonet wettable powder mixed with 50kg of water dilution spray per mu, or use 65-75g of 50% promethonet wettable powder mixed with water per mu to dilute spray (sandy soil and sandy loam soil should not use promethonyl).

No, herbicides will also damage green onions, which may cause green onions to be burned to death by herbicides, or damage to stop growing.

There are herbicides that have no effect on onion seedlings.

Glyphosate is absorbed by stems and leaves and transmitted to all parts of the plant, which can control more than 40 families of plants such as monocotyledon and dicot, annual and perennial, herbaceous and shrub. After glyphosate is incorporated into the soil, it is quickly combined with metal ions such as iron and aluminum and becomes inactive, and has no adverse effect on the soil and microorganisms hidden in the soil.

There are not many dedicated ones, oxyfluoroacetam 57 (emulsifiable concentrate), ethoxyisomettochlor 50% (emulsifiable concentrate).

These can be found on the first network of pesticides in China, and the quality of regular manufacturers can be guaranteed.

The herbicide that has no effect on shallots is the precautions for the use of glyphosate: 1. Glyphosate is a biocidal herbicide, and the crops should not be polluted when applying pesticides, so as not to cause pesticide damage. 2. For perennial malignant weeds, such as white grass, fragrant aconite, etc., apply one more time after the first medication to achieve the ideal control effect.

3. On sunny days, the effect of medication is good when the temperature is high, and it should be sprayed in case of rain within 4-6 hours after spraying. 4. Glyphosate is acidic, and plastic containers should be used for storage and use. 5. The spraying equipment should be cleaned repeatedly.

6. When the packaging is damaged, it may return to moisture and agglomerate under high humidity nonsense stroke, and there will be crystallization precipitation during low temperature storage, and the container should be fully shaken to dissolve the crystals.