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How to prevent and control soybean root rot? These methods you need to master
1. Select disease-resistant varieties. 2. Rotate with non-host crops such as corn, millet, and sweet potato. 3. When sowing, apply more farmyard manure, potassium fertilizer, phosphate fertilizer, etc. 4. When sowing, apply metalaxyl granules so that soybean roots can absorb them to prevent root infection. 5. Before sowing, use seed weight
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Occurrence patterns and control methods of soybean sclerotinia stem rot
Soybean sclerotinia stem rot occurs commonly in Heilongjiang Province. In 2001, the disease was relatively severe in Raohe County. In continuous soybean cropping fields, the disease incidence rate was 3%-30%, and in individual fields following American sunflower, the incidence rate reached 50%. In severely affected fields, the crop was even completely lost. 1 Causes of the disease 1.1 Climatic conditions In mid-to-late July, continuous low temperature and scant sunshine
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How to control soybean leaf rollers in soybean cultivation
The soybean leaf roller is a major pest in soybean production in summer and autumn. Besides damaging soybeans, it also harms leguminous plants such as mung beans and peanuts. In recent years, as winter temperatures have risen, its overwintering population has increased, and its occurrence in soybean fields has worsened year by year. Currently it is the
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How to prevent and control spring soybean virus disease? Detailed explanation of occurrence patterns and control methods
Viral disease is a major disease of spring soybean, causing about 15% yield loss in normal outbreak years and over 50% yield loss in severe outbreak years. 1 Symptoms After spring soybean is infected, the upper leaves first show light yellow-green mottling, and the mesophyll bulges in a blister-like manner along the veins; then the mottling and wrinkling become increasingly severe, the leaves become deformed, the mesophyll protrudes, the leaf margins curl downward, plant growth is clearly stunted, the number of pods decreases, the pods are small and slender, and the pods show deformed symptoms such as flattening and bending. After infected spring soybean matures, the seeds are clearly smaller, and light brown streaks can appear on the seeds.
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How to prevent and control pests and diseases during soybean cultivation?
I) Control of cyst nematode. 1. Strengthen quarantine and protect disease-free areas: it is forbidden to transfer soybean seeds from diseased areas. 2. Agricultural control: implement crop rotation of soybean with gramineous crops or non-host plants such as cotton; where conditions permit, paddy-upland rotation is best, and this is currently the most important
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How to prevent and control soybean gray leaf spot? Understand the control methods in one article
Soybean gray leaf spot is a commonly occurring disease. In severe cases, it causes leaves to die off, leading to defoliation and reducing yield. 1) Symptoms: Gray leaf spot can occur throughout the entire growth period of soybean. It mainly damages soybean leaves. The lesions are round to elliptical or irregular in shape, with a diameter
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What are the control methods for soybean frogeye leaf spot?
Frogeye leaf spot occurs commonly in all soybean-producing regions in our country, but it is most severe in the Northeast production region. All parts of the plant can be affected, and affected soybean seeds become smaller with reduced oil content. Main symptoms: after the plant and some pods are infected, lesions form on all of them, and lesions on mature plant leaves are round
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What are the control methods for soybean bud blight?
Wudalianchi City is one of the main soybean-producing areas in Heilongjiang Province and a major national commodity grain county. Soybean planting area accounts for more than 50% of the total sown area every year. Previously, soybean bud blight occurred only sporadically in the local area, and the large-scale outbreak in 1998 was unprecedented in recent years.
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How to prevent and control soybean black spot disease? Growers must read
Soybean black spot disease is a commonly occurring disease. The disease damages pods and stems, causing stems to wither and die, pods to fail to set seed, and in severe cases plants to die in patches. Seeds in diseased pods are small and shriveled, affecting yield and quality, and diseased seeds have reduced commercial value and oil extraction rate. 1)
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How to prevent flower and pod drop in soybean cultivation
1. Topdressing according to local conditions and seedling condition. For fields where the plants cannot close the rows in time during the flowering period due to lack of fertilizer, topdress once more at the early flowering stage. Generally, apply 5 kg of urea or 10 kg of ammonium sulfate per mu, which can reduce flower and pod drop. 2. Foliar spraying. During the flowering and podding stage, generally use per mu
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