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Soybean Disease Control Measures and Technical Key Points
Soybean Sclerotinia Stem Rot Soybean sclerotinia stem rot mainly infects the stems, and symptoms usually begin to appear in late July. In the early stage of infection, brown lesions appear on the stems, after which white cottony mycelium and white granules develop on the lesions, later turning into black granules (sclerotia). When the diseased plant stem is cut lengthwise, black cylindrical sclerotia resembling mouse droppings can be seen. After the diseased plant dies...
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Occurrence Patterns and Control Methods of Soybean Sclerotinia Stem Rot
Soybean Sclerotinia stem rot is a common disease on soybean crops, mainly causing stalk rot, with pale white lesions, hollow stems containing black sclerotia, and easy breakage. In the past two years, soybean Sclerotinia stem rot has shown a trend of increasing severity year by year. Causes and characteristics: 1. Large number of sclerotia in the field. The pathogen of soybean Sclerotinia stem rot is a fungus...
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Occurrence and Control Methods of Soybean Rhizoctonia Damping-off
Soybean Rhizoctonia damping-off is commonly known as "dead seedling," "damping-off," or "black root disease." In years with severe disease, the rate of dead plants in lightly affected fields is 5%-10%, while in heavily affected fields the rate of dead plants reaches over 30%, and individual plots may even die off entirely, resulting in total crop loss. 1. Field symptoms: Soybean Rhizoctonia damping-off occurs only at the seedling stage, affecting the main root...
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How to prevent and control soybean bud blight? A full breakdown of practical methods
Soybean bud blight, also called bud rot, is one of the soybean viral diseases with a relatively large impact on yield. Depending on the stage at which it occurs, losses range from 25% to 100%. In 1962 in China, similar symptoms appeared on foreign varieties introduced in Shandong Province, and afterward the disease occurred in Hebei, Beijing, Liaoning, Jilin, Heilongjiang and other places...
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Occurrence Patterns and Control Methods of Soybean Red Spider Mites
Red spider mites is the collective name for red leaf mites, a composite population of several leaf mite species belonging to the family Tetranychidae. In Huachuan County, they occur to varying degrees every year, though these are generally light occurrence years. However, according to this year's surveys, due to the effects of recent high temperatures and drought, the damage caused by red spider mites to soybeans in Huachuan County has risen from a secondary position to a primary...
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Causes and Control Methods of Deformed Melon Fruits
For melons raised in greenhouses and grown with double-film cultivation, the fruit-setting rate is not high, and flower and fruit drop is very serious. According to surveys, some drop rates reach as high as over 70%, especially for thick-skinned melons, where the drop rate is even higher. This affects both yield and quality, delays the melon's time to market, and reduces profits. The reasons are: first, too much base fertilizer was applied...
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What to Do About Potassium Deficiency in Melons? Detailed Prevention and Control Methods
While inspecting the growth of watermelons and melons, a few melon plants at the flowering and fruiting stage were found to be affected by sclerotinia rot. This disease generally occurs sporadically and has no obvious impact on melon production. In a few greenhouses, however, the incidence was more severe, causing dead vines and rotten melons and affecting yield. Prevention and control methods: (1) Pay attention to ventilation and dehumidification, and promptly remove old leaves at the base during the growing period...
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Chinese cabbage in autumn is prone to cabbage worms, so how can you control them more effectively?
Summary: Autumn Chinese cabbage is prone to cabbage worms, and these methods leave lower pesticide residues. Chinese cabbage is one of the vegetables in greatest demand in winter, especially in the northern vegetable market. Basically, one family can eat two or three bags of Chinese cabbage over a winter. Pickled Chinese cabbage, stewed Chinese cabbage, vinegar-tossed Chinese cabbage, and so on - Chinese cabbage is truly an indispensable good vegetable on the winter dining table. But the frequent outbreak of cabbage worms also really gives vegetable growers a headache. On Chinese cabbage that had been growing well, once cabbage worms crawl over the leaves, the leaves are either covered with holes or covered with insect droppings. This not only affects appearance, but more importantly affects yield.
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Key Points of Pest and Disease Control Techniques for Spring-Planted Purple Cabbage
Pest and disease control: As long as management is proper, purple cabbage generally has few diseases, so it is easy to produce pollution-free products that can be eaten raw. Purple cabbage may only suffer from seedling-stage diseases such as damping-off and downy mildew when humidity is high during the seedling stage, which can be controlled with pesticides such as Yunsheng, Dasheng, carbendazim, Xinluling, and Anke. Pests...
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What are the control methods for downy blight (Phytophthora rot) in cabbage and cauliflower?
This spring has seen a lot of low-temperature and rainy weather, making cabbage prone to sclerotinia rot, so check and treat it early. When sclerotinia rot occurs at the cabbage seedling stage, water-soaked light brown lesions appear on the leaves with indistinct edges, and the diseased tissue soft-rots, causing damping-off. When plants are affected during the head-forming stage, water-soaked sunken lesions form on the leaves near the ground and on the root crown, initially appearing...
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