What is the disease of yellowing after soybean seedlings do not grow, and the leaves shrink? How to

Soybean seedlings do not grow long, and leaf shrinkage and yellowing may be caused by a variety of reasons, such as nutrient deficiency, diseases and pests. Here are some possible diseases and how to prevent them:

1.Soybean yellowing dwarf disease: This disease is mainly caused by underground pests and viral diseases. Control methods include crop rotation, seed disinfection, timely control of underground pests and viral diseases, etc.

2.Soybean rust: This disease is caused by a fungus that causes rust spots on the leaves. The control methods include reasonable dense planting, strengthening field management, and timely use of fungicides.

3.Soybean spot blight: This disease is caused by a fungus that causes spots on the leaves. The control methods include reasonable dense planting, strengthening field management, and timely use of fungicides.

4.Soybean blight: This disease is caused by a fungus that causes yellow spots on the leaves. Control methods include crop rotation, seed disinfection, enhanced field management, and timely use of fungicides.

In short, for the problem that soybean does not grow after emergence, and the leaves shrink and yellow, it is necessary to analyze the specific symptoms and conditions, and take corresponding control measures. At the same time, measures such as strengthening field management and reasonable dense planting can also improve the disease resistance of soybean.

It is a herbicide pest. Rescue method: spray the plants with 600 times Tianda 2116 Zhuang Miao Ling + 200 times brown sugar + 500 times urea + 6000 times 99% Tianda Oxazalin + 3000 times Tianda organic silicon solution, 1 time every 7 days, 2-3 times in a row, which can effectively rescue soybean herbicide damage.

First of all, figure out what the reason is:

1. Water damage and excessive irrigation also have this phenomenon, causing the root system to die of hypoxia and rot the roots, resulting in yellowing of leaves.

2. Thrips are harmed: leaves are shrunken and yellowed, and imidacloprid and Ruijin special can be used.

3. Viral diseases, rarely occur, leaf shrinkage, yellowing and green mottling, spraying some foliar fertilizer, maybe you can restore growth, there is no special medicine (if you apologize for having too much money and want to throw it away, you can try to buy medicine to prevent it, but it will only hurt your money).

What is the disease of yellowing after soybean seedlings do not grow, and the leaves shrink? How to prevent it?

1. Soybean top blight causes dead soybean seedlings to be infected with top blight during the dust-tolerant period, and brown ring spots will be produced on the cotyledons of the seedlings, necrosis at the growth point, and the whole plant will die severely; In the early flowering stage, the diseased plant internodes were extended, the terminal bud turned brown and bent into a hook, and the plant began to become brittle and easy to fold and fold. Plants that are susceptible to the disease from the late flowering stage to the grain drum stage have buds and leaves that are easy to fall, the stem nodes and pith close to the branches turn brown, the pods are very small, the development is stunted, and the grains are not full, and the maturity is often delayed, and it remains green until harvest. Prevention and control measures: (1) The plots where the patches occur should be uprooted from the diseased plants.

2) When the infection of soybean top blight is confirmed, spray it with 64% alum 600 times solution or 75% chlorothalonil 600 times solution in time.

Summary. Thrips are harmful: leaf shrunken, yellowing, imidacloprid, Ruijinte, etc., virus disease, rarely occurs, leaf shrunken, yellowing and green mottling, spray some foliar fertilizer, maybe you can restore growth, you can try to buy medicine to prevent and control.

What is the disease of yellowing after soybean seedlings do not grow, and the leaves shrink? How to prevent it?

Hello <>

I'll be glad to answer for you, but it will take a little time to type, so please wait a while.

Hello, water damage, excessive irrigation also has this phenomenon, resulting in the root system hypoxia and dead roots, resulting in yellowing of leaves.

Thrips are harmful: the leaves are wrinkled and rolled and the locust is being prepared, yellowing, imidacloprid and Ruijin special can not be used, virus diseases, rarely occur, the leaves are shrunken, yellowing and green mottled, spraying foliar fertilizer, maybe you can restore growth, you can try to buy medicine to prevent and control.

Prevention and control methods: for the use of weeding disturbance and monitoring agents must be strict and sensitive, after the discovery of pesticide damage, it is necessary to water in time, reduce the concentration of pesticides, and spray foliar fertilizers and plant growth regulators to alleviate pesticide damage.

Hopefully, the above reply will help you <>

The leaves do not grow after a few days of high temperature in the soybean seedling stage, is the root system damaged, and how to remedy it?

Hello! Root rot often occurs at the seedling stage, resulting in brown oval lesions at the base of the stem, which are slightly concave, which will lead to rot at the base of the stem, and in severe cases, the plant will die. After discovery, it should be sprayed with Docford, Dazhou Bureau Douwei Fu Fertilizer No. 1 and Fuduofu and other agents for prevention and control.

At this time, it is necessary to provide them with sufficient water and nutrients.

Then talk about the yellowing of crop leaves, yellow leaves are more common in the process of growth, if watering is too frequent, the leaves are easy to yellow, the color of the leaves will become lighter, if the soil is waterlogged for a long time, it is also very common to be infected with leaf spot disease, which is infected with fungal diseases, and it is easy to lead to lack of oxygen in the roots, which eventually leads to root rot and plant death. Long-term wet or long-term dry soil is easy to lead to poor crop growth, according to the actual properties of the soil, each watering can not let the soil form a large amount of water, the soil should also maintain good drainage, most crops can not be planted in low-lying places.

In the process of planting crops, you can add some organic fertilizer under the soil that is completely decomposed and completely up to the standard of ny 525-2012, powdered is easier to use, or in the spring and summer growing season of some crops, some liquid organic fertilizer is added regularly, which helps to prevent soil agglomeration and keep the soil loose. Improve soil compaction, barrenness, impermeability, alkali will cause yellow leaves of plants, home potted plants can be regularly changed to the soil, timely loosening of soil, keep the soil loose, breathable, lack of fertilizer in time to apply organic fertilizer or corresponding micro-fertilizer. For acid-loving plants, ferrous phosphate solution can be watered to adjust the acidity and alkalinity.

If the yellowing of the leaves is caused by improper light, it can be reasonably seen, and the shade-loving plants should avoid strong light, and the light-loving plants need to fully see the light and be affected by the light. Not only the lack of sunlight, but also too much sunlight can cause the leaves to turn yellow and the plants to weaken. Reasonable light can promote the smooth progress of photosynthesis and promote the recovery of leaves** turn green.

<> if it affects growth, it is also easier to treat.

Summary. Soybean cyst nematode damage occurred at the soybean seedling stage, the cotyledons and true leaves turned yellow, the development was stunted, and the whole plant died in severe cases. Soybean cyst nematode damage occurred at the adult plant stage, the plant was dwarfed, the leaves turned yellow from bottom to top, the flowering period was delayed, and the pods were not full and the color was dark. When the diseased plant is pulled out, it can be seen that the root system is underdeveloped, there are many fibrous roots, there are few root nodules, and there are many fine yellow-brown or white small particles attached to the roots, that is, the female adult of cyst nematode, which is an important feature to identify cyst nematode disease.

Hello, there are many reasons for the yellowing of soybean leaves and even the death of seedlings.

Soybean cyst nematode damage occurred at the seedling stage, the cotyledons and true leaves turned yellow, the development was stunted, and the whole plant withered and died in severe cases. Soybean cyst nematode damage occurred at the adult plant stage, the plant was dwarfed, the leaves turned yellow from bottom to top, the flowering period was delayed, and the pods were not full and the color was dark. When the diseased plant is pulled out, it can be seen that the root system is underdeveloped, there are many fibrous roots, there are few root nodules, and there are many small yellow-brown or white small particles attached to the roots, that is, the female adult of cyst nematode, which is an important feature of jujube for the identification of cyst nematode disease.

Countermeasures:1Increase the application of well-decomposed organic fertilizer.

By improving soil fertility, it promotes the healthy growth of soybeans. 2.Irrigation of suitable rocks to increase soil moisture; The soil arid acre is conducive to the harm of soybean cyst nematode.

3.The use of lavender purple spora (Penicillium lavender) preparation for prevention and control, in line with the production of non-grinding and anti-harm.

Root environment is the main organ of crops to absorb nutrients, if the growth of the root system is blocked, it will cause the aboveground part of the leaves to turn yellow, the plant is short, and even the seedlings are dead. The factors that hinder the soil environment of root growth include the reduction of beneficial bacteria in the soil, soil compaction, soil acidification, soil salinization, etc. The main reason for the high incidence of these problems is that the land is early and slippery and neglected to manage, and a large number of chemical fertilizers and herbicides are used for a long time.

Countermeasures:1Manage the fields well, and after sowing and harvesting, loosen the soil and aerate it.

2.The application of biological fertilizer can improve the soil environment, and the beneficial land and air bacteria in the biological fertilizer can promote the growth and reproduction of beneficial bacteria in the soil, break the soil compaction, and alleviate soil acidification and salinization.

Summary. Hello dear! Answers to your questions:

Soybeans grow short and their leaves turn yellow because of a lack of certain nutrients in the soil, or because the soil is too dry, or it can be due to pests and diseases. Here are some possible workarounds:1

Fertilization: You can add an appropriate amount of organic fertilizer to the soil, such as well-rotted compost, chicken manure, etc., or you can spray liquid fertilizer appropriately during the growth of soybeans to supplement the missing nutrients. 2.

Watering: Keep the soil moist and avoid excessive drought, but also avoid overwatering that can lead to water accumulation in the soil. 3.

Pest control: timely detection and treatment of pests or bacteria on leaves, can use appropriate pesticides or biological control methods. 4.

Adjust planting density and spacing: Determine the appropriate planting density and spacing to ensure that each soybean plant receives enough light and nutrients. 5.

Choose varieties that are appropriate for the local climate and soil: When planting soybeans, choose varieties that are appropriate for the local climate and soil, which can reduce the incidence of pests and diseases while improving the drought resistance of soybeans.

Hello dear! Here's what you can ask about your question: Soybeans grow short and their leaves turn yellow, they may be due to a lack of certain nutrients in the soil, or they may be due to pests and diseases.

Here are some possible workarounds:1Fertilization:

An appropriate amount of organic fertilizer can be added to the soil, such as well-rotted compost, chicken manure, etc., or liquid fertilizer can be appropriately sprayed during the growth period of soybeans to supplement the missing nutrients. 2.Watering:

Keep the soil moist and avoid excessive drought, but also avoid overwatering and causing water to accumulate in the soil. 3.Pest control:

Timely detection and treatment of pests or germs on leaves can be carried out using appropriate pesticides or biological control methods. 4.Adjust planting density and spacing:

Determine the appropriate planting density and spacing to ensure that each soybean plant can get enough light and nutrients. 5.Choose varieties that are suitable for the local climate and soil:

When planting soybeans, choose varieties that are suitable for the local climate and soil, which can reduce the incidence of pests and diseases while improving the drought resistance of soybeans.

This problem occurs only in sandy soils.

Dear, that's right, when planting soybeans in sandy soil, due to the good soil drainage, the water chain and nutrients are easy to flow and lose, coupled with the low organic matter content in the sandy soil, it is easy to lead to problems such as short growth of soybeans and withered yellow leaves. Therefore, when planting soybeans in sandy soils, special attention needs to be paid to the management of soil moisture and nutrients, which can increase the content of organic matter, improve soil fertility and water and fertilizer retention capacity, or choose varieties that are more suitable for sandy soils. At the same time, reasonable irrigation and fertilization are carried out, and pest control is strengthened to ensure the healthy growth of soybeans.