What herbicide is used to control hardwood grass in green onion fields?

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.

Qingming sorghum valley rain flowers, Lixia millet small full of potatoes. When the sowing season is approaching, weeding in the field will be an indispensable agricultural task. Promethonet and Guyou are commonly used herbicides, what are their characteristics? How is it administered?

Promethony is a common herbicide in millet fields, and it is a wettable powder. After being absorbed mainly by the rhizomes of weeds, it is transmitted up and down in both directions, destroying photosynthesis and thus killing weeds. It is not susceptible to environmental influences such as rain, temperature and humidity.

It can effectively control horsetail, cow tendon grass, goldenrod, dogtail grass and so on.

Guyou (formerly Gucaolin) is a new type of herbicide developed by Nankai University, also known as sulfuron-methyl, monosulfuron-methyl herbicide for common malignant and refractory weeds in winter wheat fields in the north, it is also a wettable powder is suitable for excellent and safe soil treatment herbicides in summer millet fields. It has a certain inhibitory effect on spinning flowers, iron amaranth and monocotyledon weeds such as horsetail, dogtail grass, cow tendon grass and barnyard grass.

Herbicides before weeding and seedling are mainly used to control broad-leaved weeds in millet fields. The drug has high activity and low dosage, and the land area should be measured accurately when applying the drug, and the dosage should be accurate to avoid drug damage.

Pay attention to the weather forecast before spraying, do not spray before the rain, otherwise one is not to achieve the ideal release effect, but also to re-spray, the second is the collection of water in low-lying places will cause the seedlings to turn yellow or even die, so the spraying effect is the most ideal 72 hours before the rain. Pre-seedling spraying should be timely, not more than 2 days, spraying should be even, leaving no dead ends, otherwise the prevention effect will not be achieved; Spray before 3 leaves at the seedling stage, be sure to lower the nozzle of the sprayer to 20 25 cm from the ground, spray the ground along the ridges in a directional manner, and do not spray on the heart leaves of the seedlings. Do not increase or decrease the dosage at will, so as not to cause drug damage.

If it is another brand of prometrinet, please test it in a small area before applying it in a large area.

After weeding millet seedlings, a little carelessness will produce herbicide damage, according to yo should pay attention to the following points, the temperature is low, the amount of pesticide application in the upper limit of the drug during drought, can not be sprayed immediately before and after the rain, when the wind is greater than level four (the treetops shake), then the herbicide can not be sprayed; The dosage of clay heavy soil is higher, and the dosage of sandy soil is not pesticide or is less; Soil dryness without pesticides; When spraying stems and leaves, it is not easy to apply pesticides to seedlings that are not rooted or thin; Medication is applied according to the type of weed and its growth (2-4 leaves of weed).

Weeds grew in the green onion field, 11 2 days before transplanting green onions, 100 150 ml of 33% pendimethalin EC mixed with 40 50 kg of water per mu was sprayed evenly on the soil surface. After the green onion seedlings turn green, 5% quinoxalin EC 10ml + 24% fluoroxalyphin EC 5ml can be sprayed to control weeds.

It is important to note that the amount of herbicide must be strictly controlled.

Many farmers who grow green onions have such confusion: they don't know how to choose herbicides, and in the process of spraying pesticides, weeds will die, and green onions will also die, so why does this phenomenon occur? In fact, this is not a good herbicide.

The weeds in the green onion field mainly include mother-in-law, purslane, quinoa, spiny cabbage, small spin flower, pig disaster, horsetail, dogtail grass, etc., and herbicide control should be paid attention to in production.

Chemical weed control methods:

Post-sowing and pre-emergence soil treatment. Post-sowing pre-emergence chemical weeding is ground application of weeds after green onion sowing and before green onions are unearthed. The herbicide used stops weeds from emerging and kills them with little or no harm to green onion seedlings.

The onion was transplanted and survived for 20 days, and the weeds were sprayed at the 2-4 leaf stage. It can also be sprayed on the ground with 33% pendimethalin EC 100 150 ml per mu on 45 60 kg of water, and then watered after application to promote its emergence (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.

1. After the seedlings of the green onion field, a single control of gramineous weeds can use "cover grass energy" (high-efficiency flupyromecalin). 2. After the seedlings of the green onion field, the small grasses (such as knotweeds, quinoa, amaranth and grasses) before the 4-leaf stage can be controlled and "gol" (24% ethoxyfluorfen) can be used.

1.After the green onion is sown, 80 120 grams of 50% acetochlor EC are sprayed per mu for pre-budding closure weeding to prevent the weeds that sprout first in the green onion seedbed. If mulching is used, the dosage should be halved.

2.After sowing and mulching, spray evenly on the soil surface with 100 150 ml of 33% pendimethalin EC mixed with 40 50 kg of water per mu. Pendimethalin EC is a selective pre-budding soil treatment agent, which is conducive to improving the weeding effect when the humidity is high, and is not suitable for use if the weather is continuously dry.

After applying pendimethalin EC, do not splash the furrow with water, otherwise it may cause pesticide damage. Special attention should be paid to the use of pendimethalin emulsifiable concentrate for weeding, which is prone to pesticide damage in low-lying places or when it rains.

3.180 grams of 25% promethonet wettable powder per mu, add 50 kg of water and stir to spray evenly, or spray with 65 75 grams of 50% promethonet wettable powder mixed with 40 60 kg of water. However, sandy soil and sandy loam soil should not be applied to promethony.

1. Seedling period: spray with 150 grams of 50% herbicide No. 1 wettable powder, or 100 ml of 33% herbicide emulsifiable concentrate mixed with 50 kg of water. 2. Before transplanting:

Spray with 100-150 ml of 48% fluorine EC, or 200 ml of 48% dilometre EC mixed with water for 50-60 kg. 3. After transplanting: spray with 100 grams of 50% Ligulon wettable powder mixed with 50-60 kg of water per mu.

1. What herbicide is used for the grass in the green onion field

1. Seedling period.

150 grams of 50% herbicide No. 1 wettable powder, or 100 ml of 33% herbicide emulsifiable concentrate, or 150 ml of 48% dilometre emulsifiable concentrate mixed with 50 kg of water for spray treatment.

2. Before transplanting:

Before transplanting after land preparation, 200 ml of 48% dilodiamine EC, or 100-150 ml of 48% fluoralin EC, or 100-150 grams of 50% Dalihui wettable powder mixed with water 50-60 kg of spray treatment.

3. After transplanting.

1) 500 ml of 35% herbicide ether emulsifiable concentrate, or 100-150 ml of 33% herbicide emulsifiable concentrate, or 100 grams of 50% Ligulong wettable powder mixed with water 50-60 kg for spray treatment.

2) If you want to control gramineous weeds, you can use 30-50 ml of 15% precision and stable killing per mu to spray 40 kg of water, or 6-10 grams of grass per mu with 30-50 kg of water for spray treatment.

Second, when to use herbicides in green onion land with good results

1. Onion herbicides are usually used after sowing, before seedlings, before transplanting, and at the 2-4 leaf stage of weeds. In the 2-4 leaf stage of weeds, it can generally be sprayed with 50-75 ml of 15% precision and 40-50 kg of water in the morning or evening on a sunny day.

2. If the soil in the field is sandy soil, it is not possible to use promecestatIf fluoralin is sprayed, the solution should be mixed with the soil in time after application to prevent the volatilization of the effect.

3. When applying pesticides, it is necessary to ensure that the soil has sufficient moisture, so that the permeability of the liquid medicine will be better.

4. If the 4-leaf stage of weeds has been missed when applying pesticides, it is necessary to manually pull out the weeds.