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Symptoms and control methods of soybean anthracnose
Symptoms: The disease can occur from the seedling stage to the mature stage. It mainly damages stems and pods, and also damages leaves or petioles. When stems are infected, brown lesions first appear, densely covered with irregularly arranged black dots. When pods are infected, the small black dots are arranged in concentric rings, and the diseased pods cannot develop normally. When cotyledons are infected at the seedling stage, dark brown lesions appear with slightly lighter edges, and after the lesions expand, cracking or sunken areas often appear; the lesions can spread from the cotyledons to the young stems, causing death of the plant parts above the diseased area. When leaves are infected, the edges are dark brown and the interior is light brown. When petioles are infected, the lesions are brown and irregular. Control methods
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How to prevent and control soybean anthracnose? Detailed explanation of occurrence patterns and control techniques
1 Disease symptoms A considerable portion of infected seeds die in the soil before emergence. The disease can occur from the seedling stage to the maturity stage. The pathogen can invade young stems from the cotyledons, damaging stems and pods, and also damaging leaves or petioles. 1.1 Cotyledon disease symptoms The disease can occur from the seedling stage to the maturity stage. On the emerged cotyledons there are dark brown lesions with slightly lighter edges. After the lesions expand, cracking or sunken areas often appear. When the climate is humid, the cotyledons become water-soaked and quickly wilt and fall off. 1.2 Leaf disease symptoms When leaves are infected, the lesions are irregular in shape, with dark
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How to control dodder in soybean? Detailed control methods
Soybean dodder is a malignant parasitic weed, mainly parasitizing crops or weeds in the Fabaceae, Chenopodiaceae and Asteraceae families, and it also harms peanuts, alfalfa and potatoes.1
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What are the reasons for soybean plants flowering but not setting pods?
Liu Dezheng, a farmer from Xihe in Xinpu Town, Xiaonan District, and some farmers from Xiaogang Town and other places ask: Why did soybeans (yellow beans) flower but not set pods this year, or produce empty pods and shriveled seeds? According to our field surveys, in fact, the vast majority of soybeans this year did set pods; the cases of flowering without pod set or empty pods and shriveled seeds occurred only in scattered areas and among a minority of farmers. Through field investigation and analysis, the main reasons are as follows. First, from the perspective of varieties. This year, early and medium-maturing varieties generally flowered and set pods well, while among late-maturing varieties, some soybeans sown relatively late showed flowering without pods or empty pods and shriveled seeds.
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Detailed Explanation of the Technical Regulations for High-Yield Cultivation of Soybean with Sparse Planting
Technical Regulations for High-Yield Cultivation of Soybean with Sparse Planting: 1. Selection of dedicated varieties: Choose branching-type varieties with tall and luxuriant plants, strong stalks that do not lodge, a long flowering period, large flower clusters, a high pod-setting rate, tolerance to high fertilizer and water levels, and medium or medium-late maturity. 2. Land selection, tillage and fertilization: Choose flatland plots with high soil organic matter content and good moisture conditions, plots with a previous crop, and plots of equal fertility; the best previous crop is corn stubble, and organic fertilizer should be applied in increased amounts. 3. Sowing: Carefully select seeds. Seeds should be free of pests and diseases, uniform in size and plump. The sowing period is generally when the 5 cm soil temperature steadily
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Control Methods for Soybean Bacterial Blight
Symptoms: It damages seedlings, leaves, petioles, stems and pods. When seedlings are infected, the cotyledons develop semicircular or nearly circular brown spots. When leaves are infected, irregular chlorotic small spots initially appear, water-soaked, and after expanding they become polygonal or irregular in shape, about 3-4mm in size, with the center of the lesion dark brown to blackish brown, surrounded by a narrow chlorotic halo ring, and after the lesions merge they form dead necrotic patches. When the stem is infected, it initially presents as dark brown water-soaked elongated strips, which after expanding become irregular and slightly sunken. When pods and seeds are infected, dark brown streaks
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Detailed Explanation of Key Points for Soybean Narrow-Row Dense Planting Cultivation Techniques on Small Ridges
Key points for soybean narrow-row dense planting cultivation techniques on small ridges: 1. Crop rotation: rotate in a three-zone rotation with crops such as wheat and corn, or rotate every other year with crops such as wheat and corn, to avoid continuous cropping. 2. Soil tillage: first, flat plowing and ridging. Second, rotary tillage and ridging. Third, ridging while sowing. 3. Variety selection: choose semi-dwarf, semi-determinate type varieties with strong stems that do not lodge, are disease-resistant, high-yielding, and suitable for dense planting; the maturity period should be suitable or slightly earlier than local varieties. 4. Seed preparation: first, seed selection. Second, seed treatment. 5. Fertilization: first, increase application of
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How can the new functional components of soybeans be developed and utilized?
China is the homeland of soybeans, and over the long course of history, "soybeans have nurtured the Chinese nation." Modern science has discovered that the functional components of soybeans that nurtured the Chinese nation are mainly found in soybean meal. High-temperature soybean meal is the highest-yield product of the soybean oil processing industry. Whether the effective components in high-temperature soybean meal can be extracted is key to revitalizing China's soybean oil processing industry. The National Soybean Deep Processing Technology Research and Promotion Center invented a process using high-temperature soybean meal as raw material to continuously extract high-purity soybean oligopeptides, soybean isoflavones,
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Introduction to New Soybean Line 90-77-2
New soybean line 90-77-2 was developed by the Dryland Crops Research Institute of the Jiangxi Academy of Agricultural Sciences in 1987 through artificial hybridization and selection using the high-yielding variety Aijiaoqing and Gandou No. 1. It is a summer-autumn dual-purpose soybean with advantages such as a moderate maturity period, high yield and good quality, thick stems, tolerance to heavy fertilization and resistance to lodging, wide adaptability, and temperature tolerance. Grown as a summer soybean, 90-77-2 has a whole growth period of about 140 days, a sub-determinate podding habit, purple flowers, brown pubescence, and medium-sized leaves that are dark and thick. The plant is tall (90
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How to prevent and control soybean phytophthora root rot? Detailed explanation of occurrence patterns and control methods
After soybean phytophthora root rot was introduced into our prefecture with the transfer of soybean seeds in July 2005, our station immediately established a soybean phytophthora root rot monitoring leading group and dispatched professional and technical personnel to carry out field monitoring work in Gongliu County. 1. Disease investigation In 2005, the affected area was 2239 hectares, and in 2006 the affected area was 2858 hectares. 1. Disease situation in Xinyuan County The soybean planting area was 0.67 million hectares, the investigated area was 0.3 million hectares, and the affected area was 0.23 million hectares, of which the sporadic occurrence area was 0.2
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