How long does it take to hit wheat red spider with wheat herbicide?

Wheat in herbicides.

After about a week or so, you can fight the red spider.

Because the effect of the drug will be completely absorbed, it will be more scientific to target the red spider medicine.

The best time to apply wheat herbicides.

Soil moisture should also be well grasped: seize the opportunity of watering wheat field, apply pesticides in time to ensure the effectiveness of herbicidesMost herbicides require a certain amount of soil moisture, and soil moisture is most conducive to the exertion of herbicide efficacy when it is 40%-60%. The drought is severe, most wheat fields are dry, and herbicides should be used in a timely manner when used at this time in combination with the favorable timing after watering (or after rainfall).

Precautions for spraying herbicides in wheat:

The spraying time must be mastered before the wheat returns to green to jointing, and the average daily temperature is stable at more than 10 degrees.

Pay attention to weather changes before application, and when there is a strong cooling within 2 to 4 days before application, it is not suitable to use medicine.

Strictly grasp the dosage of medicine, can not increase or decrease at will, for some new herbicide varieties, must not be used blindly.

The best time to apply wheat herbicides.

When spraying, it should be uniform and thoughtful, so that there is no leakage and no respraying.

Choose the right type of herbicide based on the weed species in the field.

It can be separated by a week, generally speaking, after the herbicide is applied, a week is enough to remove the weed, and then a week later to spray the drug to remove the red spider is very good.

As follows:

1. It can be controlled with acetamiprid, pymetrozine, avermectin, etc.

2. Imidacloprid, acetamiprid, avermectin, pyridafen, etc. can be used for prevention and control.

3. It can be controlled with imidacloprid, pymetrozine, mite-sweeping and other agents.

4. Wheat red spider aphids can be controlled with avermectin, pyridoxalin, pyridoxrid, etc.

5. Wheat aphids and red spiders can be controlled with pesticides such as acetamiprid and pymetrozine.

6. Wheat aphids, red spiders are controlled with acetamids, pymetrozine, etc.

Precautions for daily prevention and control

1. In daily management, it is necessary to remove weeds in the field and in time, which may become the habitat and wintering place of red spiders.

2. The drier the disease, the higher the probability of the occurrence of wheat red spiders, so watering and other measures can be combined to limit the occurrence of wheat red spiders.

3. Pay attention to the time of medication, the most suitable survival temperature for wheat spider spider is 10-20 degrees Celsius, so when the temperature is particularly high at noon, spider mites may hide, it is recommended to take medicine before 10 o'clock in the morning and after 3 o'clock in the afternoon.

4. Spraying in the early spring rejuvenation period, regardless of whether there is a red spider in the wheat field, it must be prevented, because returning straw to the field will indeed increase its probability of occurrence. Don't wait until the outbreak of red spiders to use drugs, which increases the cost at this time, and the effect is not necessarily ideal.

Wheat red spider is a very harmful insect to crops, often distributed in Shandong, Shanxi, Jiangsu, Anhui, Henan, Sichuan, Shaanxi and other places. Wheat, barley, peas, alfalfa, weeds, etc. once infringed resulting in dwarf plants, stunted growth, severe dry and dead, wheat red spider to adult, nymphs suck the sap of wheat seedlings, the damaged wheat leaves appear yellow-white dots, the damaged wheat leaves become yellow later, when the plant is dwarf and the leaves are yellow, the plant growth is poor, can not be headed normally, and even dry up and die. <>

Control methods: spray a new high-lipid film 600 times a night to form a layer of physical polymer film before the disease pest, which has the functions of heat preservation, moisturizing, slow release, inhibition of virus spread and insect repellent on the surface of wheat. In the early stage of finding pests and diseases, timely use of highly targeted pesticides after 10 o'clock in the morning and before 4 o'clock in the afternoon when the temperature is relatively high.

In order to promote the growth of wheat and improve the yield, Zhuang Suiling and new high-fat membrane can also be added to each mu in the liquid medicine to achieve the purpose of insect control and increase yield. Therefore, rainfall has an inhibitory effect on them, and combined with irrigation and shaking, some wheat red spiders can be drowned. In addition, removing weeds from the edge of the field, especially grasses, can reduce the source of insects.

Wheat red spider can choose 15% pyridoxone EC 2000-3000 times (20% sweep mite net wettable powder, 3000-4000 times solution), or avermectin (insect mite gram) 5000-6000 times, 5% emamectin salt soluble granules 3-4 grams per mu, or use alkyne mites (gmite), benzene mites (dipper), dimethyl ether (mite). If you want to treat other pests as well, you can also use cyflumethrin, chlorpyrifos, fiprofenuron (carbogram) and other agents. <>

The control of wheat spider spider is actually relatively easy, as long as the right pesticide spraying is done. Our commonly used wheat control agents are: insect mite, pyridoxine, avermectin, thiobenone, mete, etc., which can be applied in combination with the pesticide preparations available in local agricultural stores and the resistance of insect pests.

Pesticides should be sprayed regularly, excellent varieties should be selected for planting, watered in a timely manner, and weeds should be removed regularly. Dimethoate powder, Luhebao Maiba emulsifiable concentrate, avermectin, phosphine emulsion, pyridoxalin, these agents are very effective.

It can be controlled by some insecticides. The more effective drugs are, insecticides, insect repellents, pesticides, fertilizers, and herbicides.

At this time, you should choose the right agent, and you should also pay attention to the appropriate use time when preventing and controlling, and you should also pay attention to the protection of the roots, and do not harm the soil.

1. Pesticides can be sprayed, but you need to pay attention to the time and method of spraying.

3. Spraying method: spraying pesticides should be sprayed, and the better the atomization effect, the smaller the impact on it.

Precautions for spraying wheat during flowering period:

1. Disease prevention and control of wheat flowering period is a more critical period, and appropriate medication is inevitable, but the flowering period is also a sensitive and fragile period for growth, and it is generally too late to recover after damage, and hail directly affects the yield.

2. It is recommended to reduce the concentration of use in the case of conventional medication, in order to enhance the effect, the number of uses can be increased, and according to the incidence law of previous years, the drug can be applied in advance, which can achieve twice the result with half the effort. At the same time, the nutrient requirements of wheat at the flowering stage are relatively high, and the simultaneous use of foliar fertilizer can increase photosynthetic efficiency, delay senescence, and achieve the effect of increasing yield.

<> wheat should be sown with mixing, not for a long time, if it cannot be guaranteed with the mixing, it should also be sown within 1-3 days after the seeding. Precautions for seed dressing: 1. Choose to dress seeds on a sunny day, and avoid the high temperature period at noon.

2. It is not suitable to dress seeds under direct sunlight. 3. After seed dressing, wait until it is dry before bagging it, and then store it in a cool and dry place. 4. During the drying process, the seeds should not be directly laid on the cement floor, and a mat should be laid on the ground before drying, so as to avoid scalding the wheat seeds.

5. The time interval between seed dressing and sowing should not be too long.

1. How long can wheat seed dressing be in advance?

1. Seed dressing time.

1) Wheat should be mixed and sown, and should not be stored for a long time.

2) If it is not possible to ensure that the sowing is carried out with the mixing, the sowing should be completed within 1-3 days after the seed dressing.

2. Precautions for seed dressing.

1) When dressing seeds, it is best to choose to do it on a sunny day, and at the same time avoid the high temperature period at noon.

2) It is not suitable to dress seeds under direct sunlight.

3) After seed dressing, you need to wait until it is dried before you can bag it.

4) During the drying process, the seeds should not be directly laid on the cement floor, and a mat should be laid on the ground before drying, so as to avoid scalding the wheat seeds.

5) After drying and bagging, store the seeds in a cool and dry place and prepare them for moisture.

6) The time interval between seed dressing and sowing should not be too long, so as to avoid the decline of drug efficacy or pesticide damage.

7) When using seed dressing, the drug should be used in strict accordance with the instructions, and the dosage should not be increased without authorization to avoid pesticide damage (which will lead to the delay of wheat seedling emergence time and slow growth rate, and will lead to the phenomenon of lack of seedlings and broken ridges in wheat).

2. Can wheat seed dressing prevent red spiders?

Currently, wheat seed dressing does not protect against spider mites. The methods of spider mites are as follows:

1. The early stage of the occurrence of spider mites.

1) Use 50-60ml of bifenthrin emulsifiable concentrate mixed with water dilution spray per acre.

2) Use 10-15ml of 5% avermectin emulsifiable concentrate diluted with water per acre.

2. The period when the red spider occurs severely.

1) Use 10% Avi. 1000-1500 times of pyridoxin EC or 20% avi. 1500 times of spirodifen suspension was sprayed.

2) Use 10 ml of 40% bifenthrin. Thiametloprid suspension is diluted with 15kg of water, mixed evenly and sprayed, which can control red spiders and aphids at the same time.

3) Use 15-20ml of 50% cyanuride chloride. Chlorpyrifos emulsifiable concentrate is diluted with 15kg of water, mixed evenly and sprayed, which can also control red spiders and aphids.

Hello dear, glad to answer for you. Wheat seedling red spider can spray methyl phosphorus, wheat seedling red spider is a common pest, can cause serious damage to wheat, affect the growth and yield of wheat. Phosphine is an organophosphorus insecticide, which can effectively control wheat seedlings red spiders, but the following problems need to be paid attention to when using it:

1.The time of spraying phosphorus: the damage of red spider in wheat seedlings mainly occurs in the early stage of wheat growth, so when red spiders are found in the early stage of wheat growth, they can be sprayed with phosphorus for control.

However, it should be noted that phosphine is highly toxic to humans and animals, and it is necessary to avoid pollution and harm to people and animals when spraying. 2.Concentration of spraying phosphine:

Too high a concentration of phosphine can cause harm to wheat, so it needs to be diluted according to the instructions when using it to avoid adverse effects on wheat. 3.Method of spraying formaphosphine:

Phosphorus can be sprayed by foliar spraying, soil application, etc., among which foliar spraying is the most commonly used method. However, it should be noted that it is necessary to pay attention to the weather conditions when spraying, and avoid spraying under high temperature, strong light, high humidity and other conditions to avoid causing harm to wheat. In summary, spraying phosphine can effectively control wheat seedlings red spiders, but it is necessary to pay attention to the time, concentration and method of use, and comply with relevant safety and environmental protection requirements.

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