How to control pests and diseases after winter wheat returns to green? How should pesticides be spra

The main pests and diseases of winter wheat in the regreening stage are wheat root rot, wheat sheath blight, wheat aphids and wheat red spiders. You can choose according to the actual situation, for example, you can use 1500 times liquid avirofenoxil + 1500 times liquid thiamethoxam + 1000 times liquid 30% benzoconazole emulsifiable concentrate. In the winter wheat back to green, get up jointing period, booting and flowering period and so on spray once, the wheat pests and diseases have a good control effect, in order to achieve the purpose of supplementing fertilizer, can be sprayed pesticides, in the liquid potassium dihydrogen phosphate aqueous solution, Tianda 2116 foliar fertilizer, etc., can play a role in insect treatment, fertilizer, fertilizer and other multiple effects.

At this time, you should spray pesticides, which can also be a good way to prevent and control pests and diseases, and put some water in these pesticides, and then spray them on the leaves and roots of winter wheat.

To control aphids and red spiders, Avi imidacloprid EC can be used, because the formula not only has good permeability, but also has good systemic conductivity, which can transmit the agent to all parts of the plant and kill the pests in each part; For the prevention and control of sheath blight and root rot, 30% benzoconazole emulsifiable concentrate can be used, because benzopropiconazole has a wide bactericidal spectrum and good systemic conductivity, it has a good preventive and excellent effect on wheat sheath blight and root rot.

To control wheat diseases and insect pests, you can choose agents with systemic conduction properties, compound spraying, which can play the purpose of spraying multiple prevention, there are many commonly used drugs, you can choose according to the actual situation, such as 1500 times liquid avirofenoxil + 1500 times liquid thiamethoxam + 1000 times liquid 30% benzopropundazole EC. In the winter wheat back to green, get up jointing period, booting and flowering period and so on spray once, the wheat pests and diseases have a good control effect, in order to achieve the purpose of supplementing fertilizer, can be sprayed pesticides, in the liquid potassium dihydrogen phosphate aqueous solution, Tianda 2116 foliar fertilizer, etc., can play a role in insect treatment, fertilizer, fertilizer and other multiple effects.

After the vernal equinox, the weather will become warmer and the daylight will become longer, but in 2022, there will be more rainy days, very few sunny days, and the temperature will be sometimes cold and sometimes hot, which is not conducive to the growth and development of wheat. In early February, the temperature warmed up significantly, all kinds of green plants are digging is taking root and sprouting, during this period all the wheat seedlings in the farmland grow and develop, there will be different changes every day, during this period can be based on the rise of wheat seedlings to do a good job of management methods, to ensure a bumper harvest of wheat. The wheat has been "honed" through a winter, and some fields have experienced drought conditions.

In fact, there are many benefits of watering green water, such as alleviating drought and promoting the normal return of wheat, especially the weak rise of wheat, local rainfall, less snowfall, and the land where drought has occurred years ago, watering promotes the normal growth and development of wheat. In addition, after watering, pay attention to the soil in the field, which can effectively increase the soil temperature, after all, after the regreening period, the environmental temperature is relatively not so high, and the soil temperature is raised, which is more conducive to the normal regreening of wheat and promotes the growth and development of the back.

After the early spring, the wheat gradually turns green, and the growth and development are restored, and the wheat fields with different seedling conditions should adopt different control measures to reduce the project investment and employment. Generally, after the wheat returns to green growth and development in spring, not only the growth and development are accelerated, but also must be fertilized on time, watered, controlled, lead and diseases will often occur, and it is usually advisable to detect and prevent. However, according to statistics, at this stage, the key to wheat is still in the link of returning to green and standing up, but by the extensive drought last winter, the cold damage is more serious, coupled with the increase of precipitation in spring, the weeds in the field are seriously harmed, and the disease is too light as a whole.

For the wheat field that has risen well and the wheat has entered the early stage of heading, it is also necessary to take advantage of the good temperature at this stage to immediately spray paclobutrazol or anti-inverted ester and other wheat control drugs, and to harm the countryside for some wheat search engine spiders or sheath blight, you can also add insecticides and pesticides fungicides equivalent to spraying prevention. Spring wheat field management, whether it is fertilizer or watering, etc., should be integrated into the specific development of their own fields, and at the same time, perseverance in the prevention of cordyceps sinensis qualified, not suitable for rigid sets, or casual abuse of pesticides and insecticides.

Disease prevention After the wheat regreening stage, sheath blight and root rot are the mainstay, both of which are soil-borne diseases, with high humidity and serious occurrence in airtight plots, and the disease at the seedling stage is not obvious, and the withered white ears appear in the later stage. There is a difference between the symptoms of sheath blight and root rot, where sheath blight has cloud-like patches at the base of the stem, while root rot occurs at the roots.

Insect control The temperature of wheat in early spring is warm, which is conducive to the reproduction of aphids, red spiders, and sativumers, resulting in yellowing of leaves, decreased photosynthesis, affecting the growth of cherry wheat, low panicle rate, and not full grains. In particular, spider mites in wheat fields are more serious in areas with drought and high temperatures.

3.Promote growth After wheat returns to green, it also enters a period of rapid growth, and the nutrients required increase. The commonly used nutrient foliar fertilizer is potassium dihydrogen phosphate, plus brassin, which everyone is familiar with.

It can be sensitive and stuffy to strengthen the prevention of diseases and insects, especially focusing on the prevention and control of mosquito mushroom disease and rot, Baiqiao finger meal, etc., to strengthen the weed control in the field, and the weeds in the green stage are the best to reproduce.

After the wheat returns to green and contains the young, it must be treated with insect control and bright disease, sheath blight and root rot are the most likely at this time, and it is necessary to prevent aphids and red spiders and other insect pests.

What pests and diseases should be paid attention to during the wheat regreening period? Weeding in wheat fields is best carried out before winter, but due to the influence of precipitation and cooling weather before winter, the area of chemical weeding before winter is relatively small. Therefore, it is particularly important to do a good job of chemical weeding in spring in a timely manner.

Some herbicides are applied too late in spring, which is easy to produce pesticide damage and residues, and chemical weeding in spring should not be later than the end of March. It is necessary to use herbicides in strict accordance with the prevention objects and recommended dosages recorded on the pesticide label, and excessive use is easy to produce pesticide damage. According to the weed community structure of wheat field, the following herbicides can be selected:

Among the dicotyledon weeds, wheat fields dominated by Artemisia annua, Capsule, and quinoa can be used with 50g L diflusulam suspension 6g per mu, or 56% 2-methyl4 sodium chloride per mu can be solvent 100 140g. In the wheat field dominated by pigs, 50 70 ml of 20% chlorofluoropyroxyacetic acid EC or 10 ml of difluoropyroxyramide EC can be used per mu, and fluchloropyridinate, dicamba, azolone or benzylpyrimide can also be used.

Among the monocotyledonous weeds, the corn stubble wheat field was dominated by finch wheat and knotweed. To prevent the removal of finch wheat can be acre, use 9 or 30g l methyldisulfuron suspension 25 30g, or 70% fluzosulfuron water dispersible granules 3 4g. To prevent the removal of knotted maico, use 30g l methyldisulfuron suspension 25 30g per mu.

The above agents are used for stem and leaf spray control.

Wheat fields where dicotyledon and monocotyledonous weeds are mixed can be mixed with the above agents, or a compound preparation containing the above ingredients can be selected. Chemical weeding in spring wheat field is easy to cause pesticide damage to crops, and it is forbidden to use long-residual herbicides, such as chlorsulfuron-methyl, mesulfuron-methyl and other pesticides.

In short, the chemical control of diseases, insects and weeds must be selected according to the actual situation of the local wheat field. The application of chemicals must be prepared and sprayed in accordance with the corresponding instructions for use! What pests and diseases should be paid attention to during the wheat regreening period?

Aphids, powdery mildew, leaf rust, red spiders, sheath blight, these pests and diseases are very affecting the yield, and we must pay attention to it.

Common diseases and pests include leaf rust, red spiders, sheath blight, powdery mildew, and wheat aphids, which need attention.

Powdery mildew, sheath blight, leaf rust, wheat aphid, red spider, these are very common, be sure to protect the plant.

In the anti-green stage of wheat, it is recommended that growers use 20ml of 24% thiofuramide suspension or 10g of 80% tebuconazole water-dispersible granules per mu for spraying.

In early spring, wheat must be prevented from inverted spring cold, which has been relatively common in recent years. The wheat in the regreening stage has just begun to enter the vigorous growth period, and once it encounters low temperature, the growth point will be frozen, which will affect the jointing and heading of the wheat in the later stage. In the regreening period of wheat, it is recommended that growers must supplement wheat nutritionally.

After a winter of consumption, wheat needs a lot of nutrients to lay the foundation for vigorous growth.

There are two ways to supplement nutrients, one is to water the wheat back to green, in this process, 15 to 20 kg of urea per mu, or use high-nitrogen compound fertilizer; Another method, foliar spray liquid nitrogen fertilizer, liquid nitrogen fertilizer is also very common in the agricultural materials market in the past two years, which is more time-saving and labor-saving, and the effect is good!

The main measures for the management of wheat regreening stage

Hoeing and loosening the soil: This is an important measure to promote the early return of wheat seedlings to green and healthy growth. Because of the loosening of the topsoil, the aeration conditions of the soil are improved, which can increase the soil temperature and promote the development of the root system.

Because the capillary tube is cut, the moisture of the underlying soil can be prevented from rising, which plays a role in moisture preservation. In addition, hoeing pine can also promote the activity of soil and soil microorganisms, which is conducive to the release of soluble nutrients. The number of hoeing pines, generally from the return to the green to the jointing of a total of 2-3 hoes, the depth of pines should be shallow first and then deepened one by one.

Top dressing: The green fertilizer should be applied according to the seedlings. For the 2-3 types of seedlings with weak growth before winter or the wheat seedlings with poor soil fertility and early sowing and long fertilizer, they should be applied early and re-applied to the green fertilizer, and the soil can be applied when the surface begins to thaw (topping fertilization).

Generally, about 20 kg of ammonium bicarbonate can be applied per mu, and about 15 kg of superphosphate per mu should be mixed with phosphorus-deficient wheat fields. If conditions permit, it is best to apply diammonium phosphate 10-15 kg per mu. Regreening fertilizer plays an important role in promoting wheat seedlings from weak to strong and increasing the number of ears per mu.

One spray three prevention, the object of control is sheath blight, underground pests, and wheat spiders, the prevention and control of sheath blight can be 5% Jinggangmycin per mu 150--200 ml plus water 50-75 kg of wheat bottom spraying, interval 10 and then spray again. Underground pests can be sprayed with 40---50 grams of wheat base per mu. The harm of wheat underground pests causes the lack of seedlings, and the prevention and control of underground pests is the basis for ensuring the abundant yield of wheat seedlings.

The prevention measures are mainly based on seed dressing, and the seed dressing agents include 50% 1605 emulsifiable concentrate, 75% 3911 emulsifiable concentrate, phosphine octathion, 40% dimethoate, etc. After mixing well, it can be sown after simmering for more than six hours.

In terms of diseases, there are "four diseases of rotten roots" - sheath blight, total erosion, stem base rot, root rot, as well as viruses such as "yellow mosaic virus disease" and "dwarf mosaic disease", as well as latent fungi such as rust, powdery mildew, and "scab". Wait a minute. In terms of insect pests, the main pests that harm the leaves are aphids, red spiders, sucking insects, and wheat leaf peaks, and the underground pests that harm the root system are mainly grubs, mole crickets, needleworms, etc., which often cause wheat seedlings and broken ridges, which have a great impact on the yield in the later stage.

If infected with root rot, wheat seedlings will die early, and the diseased plant will not rot at the base of the stem and show "wilt" death, wheat root rot is a parasitic fungus, and the fungus can overwinter and summer inside and outside the seed and on the diseased residue. Root rot is the most important disease at the seedling stage. In the regreening-jointing stage, sheath blight, rust and other diseases and red spiders, it is recommended to use avidafen plus benzoconazole or benzoxystrobin spray for control.

When using grass grass, it is necessary to choose wild oats and early and mid-season to spray wheat Niang, and the temperature should not be too high on a sunny day to prevent the growth of wheat from being affected by large amounts or high temperatures. After jointing, it is never allowed to use chlorethoxin and herbicides to prevent pesticide damage, weeds appear, and manual pulling. During this period, the main pests and diseases that occurred frequently were sheath blight, root rot, total erosion, yellow dwarf, red spider, underground pests, etc., among which sheath blight was more serious.

The period of wheat rejuvenation and jointing is the most important time period for the prevention of pests and diseases. We can choose mixed pesticides according to the actual situation, and we can use insecticides, herbicides, fungicides and other mixed methods to achieve the purpose. Tips:

The first point is that it is important to pay attention to the timely spraying of pesticides. The second point is that this watering should be carried out in a timely manner. The third point is that we should pay attention to timely weeding, which are very important tips.

The first point is that it is very important to pay attention to spraying pesticides in a timely manner, the second point is to carry out this watering in a timely manner, in fact, this watering is very important, and the third point should pay attention to timely weeding, which are very important tips.

We all know that weeding in the spring is crucial, but many of you don't know how to do it. For example: When exactly should herbicides be used?

What should I pay attention to when using it? Or which pesticides are used for wheat regreening and weeding management, mainly management measures such as heat preservation, weeding, and fertilization. After wheat returns to green, the occurrence of dry grain and powdery mildew is the mainstay, so it is necessary to focus on the prevention and control of these diseases.

As the temperature rises, the wheat begins to turn green. Mainly through watering and fertilization, plant diseases and pests are controlled, weak seedlings are promoted, and more heading is promoted.

Laying the foundation for high yields and fertilizing through snow: Launched from late February to early March according to weather forecasts"Snow breaking fertilization and pesticide application technology"It is necessary to compensate for the nutrition of winter wheat in time, improve the artistic ability of winter wheat during the green period, and reduce the snow rot of wheat. Late sowing field management Fertilizer and water management Wheat fertilizer can be divided into three times, namely green manure, Hefei, and boiling fertilizer.

If the pre-holiday topdressing or wheat growth is good, the first two topdressing can also be buried together with the topdressing, when we get up to water the greening water, we can water in time according to the soil moisture, especially the greening drought first.

Watering in advance can promote wheat seedling topdressing, the third is to control wheat pests and diseases, this year is very serious, improper field management can lead to a reduction of more than 50% of the yield, so do a good job in pest control and management. The best time for chemical weeding in winter wheat field is before wheat seedling stage is engaged, and the best time for weeding is at the 2-4 leaf stage, because at this time, overwintering weeds and early spring weeds are not large, and late spring weeds.

The best time for chemical weeding in winter wheat field is before the emergence of wheat seedlings, and the best time for weeding is at the 2-4 leaf stage, because at this time, overwintering weeds and early spring weeds are not large, and late spring weeds. When the degree reaches about 10, spray as soon as possible. After the wheat returns to green, when the soil is relatively dry and the temperature is stable, it is necessary to water a little water first, and it is best to use the method of sprinkler irrigation to improve soil moisture.

All kinds of wheat fields should be shallow tillage in the regreening stage to loosen the soil, break the compaction, increase soil permeability, increase ground temperature, eliminate weeds, and promote early stable root growth.