How to deal with soybean pests and diseases when planting soybeans in a large area?

Of course, it is spraying the corresponding pesticides, when planting crops in a large area, pests and diseases may break out intensively, and it is very important to observe at any time to find signs of pests and diseases and take measures to deal with them immediately.

First of all, you need to observe what disease or pest soybeans are affected by, and then go to the local pesticide store to buy the corresponding pest and disease drugs, and put them in the spraying machine to spray the soybeans.

The harmful range of soybean gray spot disease is relatively large, and the seeds, leaves, stems, and pods of soybean are infected with gray spot disease. After soybean gray spot disease occurs in the field, it is necessary to administer medicine in time to prevent it. This content only talks about prevention methods, which farmers are more interested in, but the prevention measures are not introduced here, and all the pests and diseases below are the same.

The available agents are leukophanate, carbendazim, thiophanate, jade heart, jade heart, alcohol-free, etc. According to the local resistance, <>

Soybean anthracnose is a common disease, from the seedling to the harvest will be basically harmed, the main damage parts of the stem, leaves, pods, etc., if the local rainy season continues, the occurrence of anthrax will be relatively serious. After anthrax occurs in the field, buy fungicides in time to prevent it, the sooner the better. The drugs that can be used are amine, bromonitrile, metryptamine, carbendazim, etc.

Depending on the severity of the disease and the problem of resistance, it can be increased or decreased appropriately or sprayed several times. Soybean purpura is also a relatively common disease, widely distributed, basically occurs in the north and south soybean planting areas, mainly harms the pods and seeds, but in the planting process, the leaves and stems of soybeans are also infected, seriously affecting the yield and quality of soybeans.

Prevention and ** soy purpura should also be effective when it first occurs. You can choose phenylethylamine, thiophanate, carbendazim, etc., or you can use the aforementioned agents to prevent it in advance. Because once the seeds and pods are infected, it is more difficult to return to their normal state, and depending on the severity of what happens in the field, it can be prevented multiple times.

In the process of soybean planting, we must strengthen field management in order to obtain high-yield, stable and high-quality soybeans. The full return of straw, the extreme frequency of severe weather, and in general, the occurrence of pests and diseases through the field is more serious. Soybean underground pests, ground pests, soybean underground diseases, ground diseases, the occurrence is also more serious, and the resistance is relatively large.

Therefore, soybean pests and diseases have threatened our planting effect, and farmers must pay attention to prevention and control, and cannot invest generously.

Our different regions have different planting structures and different insect pests. In particular, drought is very harmful to underground pests in the field, and the impact of straw on the field and warm winter is also great, and the underground pests and insects are safe to spend the winter, and the underground pests are more serious to produce underground pests. There are mainly earthworms, needleworms, earthworms, etc.

For underground root crops, we can choose seed coatings to avoid his danger. You can choose salad dressings, including imidacloprid, thiazide and other seed coatings, which last longer, and farmers choose chlorpyrifos granules and phosphine granules spraying only for a temporary effect, and can not achieve long-term results. Where conditions permit, it is possible to use his characteristics for light hunting and biobait hunting.

We should spray some pesticides to prevent pests and diseases in advance, so that it will be fine, and the yield will become exceptionally good.

When planting soybeans and encountering insect pests, we should master the skill that as soon as we find that soybeans are diseased, we must first buy some pesticides, and we must deal with these pests in time to prevent it from continuing to develop.

For viral diseases, can be prevented in advance, can not be prevented in advance, wait until the onset of the disease, timely prevention and control, the earlier the prevention and control caused by the harm less, there are farmers reaction, in the process of prevention and control, due to the increase of local resistance, the effect is not good, this situation can be added to some silicone additives, to improve the control effect of fungicides.

Rust mainly damages leaves. In the early stages of the disease, yellowish-white spots appear on the leaves, with prominent blisters, fragments, and rust powder within the spots. With the development of the disease, dark brown spots appear at the lesion, dark brown powder appears after rupture, and finally the leaves wither yellow, which is extremely harmful.

Rust, mainly spores, overwinters on soil or other diseased residues. The following year continued to do harm. After harvesting, the disease residue is collected and incinerated in time, the soil is deeply turned white, and disinfected once before planting.

When planting, increase the application of phosphorus and potassium fertilizers to improve the disease resistance of the plants, and spray triamcinolone acetonide when the disease occurs to eliminate the disease. Viral diseases have different symptoms at the time of onset, such as leaf atrophy and open pulse atrophy, each with different characteristics. At the onset of the disease, the flowers and leaves are mottled, and some of the leaves become smaller, or the leaves are curled and not extended, and the plant is short.

It is mainly transmitted by insects, but it can also be caused by high temperature climates, arid environments, poor plant drainage, heavy soil viscosity, and excessive nitrogen fertilizer application. Anti-poison or poison netting was sprayed at the beginning of the disease. Anthracnose can occur and grow into plants at the seedling stage, and the cotyledon can be spotted at the seedling stage.

When the temperature is too high, the lesions appear pink and sticky; Leaf spot disease occurs when the adult plant is infected, and the petiole and stem spots appear reddish-brown. When exposed to high temperatures and humidity, the stems and vines can also be spotted. As the disease worsens, the plant decays and dies.

Disinfect seeds and soil before planting, avoid continuous cropping, and rotate with non-leguminous crops for more than 2 years. Strengthen field management, remove and burn diseased plants in time, deepen the soil to prevent the spread of pathogens again, and irrigate the roots with carbendazim wettable powder when the disease occurs.

Purple-brown spots appear on the sides of the leaves, then expand into rounded shapes. Dark green or dark brown mildew spots appear on the surface of the spots. It is easy to develop the disease under high temperature and high humidity, and the disease is more serious than that of rotation, and it is also serious when the ventilation and light transmission are poor.

Lentils are also susceptible to leaf spot during planting. This disease is more serious in continuous cropping areas and can seriously affect lentil yields. In this case, lentils should be rationally applied with potassium fertilizer to enhance their disease resistance.

Solutions such as methyl tobuzin or carbendazim can also be sprayed appropriately. In the process of growing lentils, in order to obtain high yields, it is necessary to properly prevent various pests and diseases. Rust and leaf spot are common diseases during lentil maintenance and should be prevented by spraying with appropriate chemicals.

Reasonable dense planting: lentils are very strong in fertilizer absorption and climbing ability, once planted too densely, it will cause the leaves to grow too vigorously and grab the sun. At this time, it is easy to attract the patronage of borers, and the general planting plant spacing is 33 35 cm, the row spacing is 130 150 cm, and it is appropriate to plant 700 800 plants per mu;

Control methods: before wintering, weeds and debris are all removed, the soil is turned deeply, the eggs are eliminated, aphids reproduce the fastest under the conditions of 23 27 temperature and 75 85 humidity, strengthen management, create an environment that is not conducive to the growth of aphids, and can also use natural enemies to control, and can also be sprayed with chemical agents.

From the beginning of soybean emergence, aphid damage has been present. It feeds on young leaves, young stems, and young pods, which will cause soybean leaves to curl up, slow down the growth rate, and in the worst cases, the whole plant may die. Prevention method:

Spray evenly with 1500 times of 50% phoxanthion emulsifiable concentrate or 20% 2000 times of inulin.

Characteristics of main soybean insect pests and control measures.

Soybeans originate in China and are one of the main food crops in China. Now in mid-August, the growth of soybeans has also reached a more important middle and late stage.

We must do a good job in field management, prevent diseases, insect pests, and waterlogging, and do a good job in the "three preventions" to make soybeans of high quality and high yield.

So, what are the main pests that occur during soybean cultivation? And how can we prevent it?

Bean moth. Bean moth is a pest we are more familiar with, commonly known as bean worm, which mainly harms the leaves of soybeans, causing leaf holes, and eating lightly into mesh; In serious cases, the whole bean plant is eaten into a bare pole commander, and it cannot form pods, which affects the yield.

Control method] We should spray the drug at the larval stage before the 3rd instar for treatment. It can be sprayed evenly with 50% phoxanthion emulsion 1000 times or 20% pyrethrin 2000 times, mixed with water

Heart-eating insects. Heart-eating insects, with soybean pods as the main harmful objects. It directly affects the number of pods set and reduces soybean yields.

Precautionary approach

We can use 10% cypermethrin EC, which is about 35 to 45 ml per acre, or use dichloride EC, the active ingredient to 1 gram, mixed with more than 40 kg of water for uniform spraying, which directly affects soybean pods, kills pests, and improves yield.

Aphids. From the beginning of soybean emergence, aphid damage has been present. It feeds on young leaves, young stems, and young pods, which will cause soybean leaves to curl up, slow down the growth rate, and in the worst cases, the whole plant may die.

Prevention method:

Spray evenly with 1500 times of 50% phoxanthion emulsifiable concentrate or 20% 2000 times of inulin.

Soybean growth into the middle and late stage, the existence of insect pests, not only the above, we have intercepted a few important explanations.

Summary].At this stage, the field management of soybean should be based on the prevention of pests and diseases, combined with the management of water and fertilizer Xianghui tribe, supplemented by cultivation and weeding, so as to achieve "prevention first, prevention and control combined.""Only by strengthening comprehensive management can we increase production and ensure a bumper and stable soybean yield.

1.Soybean root rot control technology.

For soybean root rot, the most effective preventive measure before the onset of the disease is to rotate with corn and other crops. If soybeans get sick, they can be controlled by using chemicals such as methyl sulfur, chlorothalonil, etc. However, it should be noted that in order to avoid drug resistance, these agents should be used interchangeably!

2.Soybean gray spot control technology.

Soybean gray spot, also known as brown spot, is a fungal disease. The preventive measures are mainly to improve the drainage capacity, pay attention to the amount of fertilizer and watering, prevent the soil moisture from being too high, and create conditions for the breeding of germs. If it has already occurred, the agents that can be used include thiophanate-methyl, methamethyl, etc.

Of course, these potions should also be used in turn!

3.Soybean latent root disease prevention and control technology.

The effective control measure of soybean root latent root worm is to rake the stubble in autumn and winter, and turn out the underground pupae to destroy its growth environment. In addition, phosphine EC can be used for chemoprevention! If soybeans are infested by pests, pyrethroids can be used to effectively kill pests!

4.Yellow leaf disease.

Yellow leaf disease is a common disease of soybeans, which is caused by a lack of nutrients such as zinc and iron. At the onset of the disease, the leaves turn yellow, the plants are dwarfed, the flowers are few, and the pods are not formed. In severe cases, the entire field is not harvested.

Prevention and control methods: choose varieties with strong stress resistance and disease resistance, avoid continuous cropping, reasonably rotate with other non-leguminous crops, apply more farm fertilizer or organic fertilizer, improve the content of trace elements in the soil, spray zinc, iron, fungicides and other trace fertilizers when the disease occurs, and the leaves will turn green in about 3-4 days.

5.Vermin. Soybean pests mainly include borers and aphids, which mainly damage pods and leaves.

Pod borers burrow into the pod and bite the beans inside the pod, resulting in reduced yields. However, aphids prefer to live in groups and suck the sap of the leaves, causing the leaves to wilt and fall off, resulting in weakened plant growth and reduced yield and quality.

Control methods: remove all debris in the field in winter and spring to prevent insect eggs from overwintering on it, strengthen management, reduce spraying pesticides when pests are found, and use natural enemies to control pests when watering.

It is necessary to prescribe the right medicine, choose the right insecticide or herbicide according to the type of pests and diseases, usually do a good job of prevention, one must be watered in time, the temperature of planting should be grasped at about 23 degrees, and the work of loosening the soil should be done regularly, and the branches and leaves should be pruned regularly.

Soybean downy mildew can be controlled with agriculture. Choose disease-resistant varieties and select seeds. It can also be prevented with pesticides. Soybean gray mold, soybean gray spot, soybean sclerotinia and so on can be controlled with pesticides.

First of all, the land is organized, the air flow is increased, all the weeds inside are removed, and then the water is re-watered, pesticides are used, photosynthesis is enhanced, and the temperature is raised, which is the control measure.

At present, more than 120 species of soybean diseases and insect pests have been reported in the world, including more than 60 fungal diseases, 28 viral diseases, 20 nematode diseases, 10 bacterial diseases, 3 phytoplasma diseases, and 2 higher parasitic plants. Fifty-two species have been reported in our country. There are more than 10 kinds of pests that are prevalent and seriously harmful in soybean production.

Soybean seedlings are harmed by grubs, ground tigers, cotton bollworms, soybean aphids, soybean red spiders, etc. Harmful to soybean plants include cotton bollworm, soybean leaf roller borer, soybean stalk black submarine fly, etc. The damage at the pod-setting stage includes soybean heartworm, bean pod borer, etc.

After soybean harvesting, the remains of diseased plants in the field should be removed, and the ground should be turned over as soon as possible, and the diseased residues should be buried deep in the ground to accelerate the death of pathogenic bacteria and alleviate the disease. For the pests that overwinter in the soil, the pests are turned over to the surface of the soil through ploughing, and after harrowing, pressing, raking, mechanical damage, coupled with the sun, wind, rain, and natural enemies to eat, the mortality rate of pests can be greatly increased The mortality of this insect species is more, the larvae are mainly harmful to the leaves of the beans, like to eat tender tips, love to eat bean curd and young pods, can eat up the bean leaves, causing the beans to fall into flowers. The beans are not full, which seriously affects the yield of soybeans.

The first is agricultural control, after soybean harvesting, the residue of diseased plants in the field should be treated in time and the ground should be turned over as soon as possible, and the diseased plants should be buried deep in the ground. 2 is to strengthen the cultivation technology, the sowing period is too early or the sowing period is too deep may aggravate the occurrence of root rot, as well as fertilization, increase organic fertilizer and other ......Soybeans are a common field cash crop in our daily life, and the planting area is very extensive. In the process of soybean planting, it is inevitable that there will be some attacks of pests and diseases, and if not controlled in time, it will lead to a serious reduction in soybean yield.

Generally, female adult mites gather on the dead leaves, weed roots or soil crevices in soybean fields for overwintering, and more than 10 generations occur every year. When the temperature rises to 5-7 on average in spring, the overwintering female insects emerge from the stinging activity, first breed on weeds such as thistle, dandelion, plantain, etc., and then transfer to soybean in June and July, and spur silk and pull net clusters on the back of the leaves