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What to Do About Garlic Continuous Cropping? Practical Control Methods Shared
Yongnian County is a major garlic-growing county, but in recent years, continuous year-after-year garlic planting has caused physiological diseases to become increasingly severe. In addition, garlic's selective absorption of nutrients has made the problem of insufficient nutrient supply prominent, showing symptoms such as dead seedlings, root rot, anthracnose, and in the later stage some cylindrical leaves like scallion leaves, which are unfavorable for the normal bolting of garlic scapes. This not only increases the labor intensity of garlic farmers but also reduces garlic yield. Changing the garlic root environment is the key to increasing garlic income, as follows: apply "Nong Dage" or "Chongcha No. 1" biological bacterial fertilizer per mu of garlic
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Identification and Control Methods for Fish Lice (Argulus sp.)
Signs of Infection Fish lice are disc-shaped parasites, 8 to 12 mm in diameter, and come in various colors, from light green to brown. They can be seen attached to the fish's body and fins. Fish Affected Fish lice can infest many species of coldwater fish. They are almost impossible to find on tropical species unless the parasites are brought into the aquarium on live food or plants. Even then, fish lice cannot survive for long in warm water. Details of Infection These parasitic crustaceans have eight feathery legs,
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Prevention and Control Methods and Technical Key Points for Common Diseases of Large Yellow Croaker
I. Cryptocaryon irritans disease (white spot disease) Symptoms: A large number of small white spots appear on the body surface. In severe cases, the fish body is covered with a layer of white film. Due to the destruction caused by the parasites, secondary bacterial infection is triggered, resulting in inflammation and necrosis of the fish epidermis, scales easily falling off, fin rays rotting and splitting. When parasitizing the gills, it destroys the gill filaments, and after bacterial infection, it causes gill rot. When the parasites invade the fish's cornea, it causes inflammation and blindness. Diseased fish have reduced appetite, become thin, and swim erratically. The parasites can be identified by microscopic examination. Prevention
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Prevention and Control Methods and Technical Key Points for Pig Cold Diarrhea
The root cause of pig "cold diarrhea" disease has now been confirmed to be infection of pigs with transmissible gastroenteritis and epidemic diarrhea, and pigs are prone to this disease when the weather turns cold. Once a pig contracts this disease, in addition to severe diarrhea and pig death (mortality of suckling pigs can reach as high as 100%), it also seriously affects pig growth and increases the culling rate of pigs. In order to effectively control the occurrence of this disease, the pathological characteristics and prevention and control measures of the disease are introduced as follows: 1. Pathological characteristics: Porcine transmissible gastroenteritis and porcine epidemic diarrhea
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Control methods for diseases, pests and weeds during the cotton sowing period and seedling stage
This year, affected by abnormal climate, the cotton sowing time in our province was delayed. Under this continuous low-temperature condition, cotton growth and development were delayed, and the degree of disease and pest damage was relatively aggravated. For this reason, the situation facing cotton disease and pest control this year is more severe. From the start of sowing, every key control technique must be firmly implemented, especially the links in pesticide selection and use. The main disease and pest control techniques for the sowing period and seedling stage are introduced to the broad community of farmers as follows: 1. Strictly control the seed treatment with pesticides at the sowing stage. Before cotton sowing, focus on
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Control Methods for Premature Senescence in the Late Growth Stage of Cotton
The internal cause of late-stage premature senescence in cotton is that after cotton growth enters August, intense competition for nutrients arises among the roots, stems, leaves, and bolls, leading to an imbalance between nutrient supply and demand; the external causes are insufficient water and fertilizer in the cotton field during the late stage, such as phosphorus or potassium deficiency; in some cotton fields, it is also because of too many pesticide sprayings in the late stage, or excessive pesticide concentration, which causes serious damage to cotton leaves. It should be pointed out that the fundamental measure to prevent premature senescence in cotton is to start with strengthening the basic construction of the cotton field, that is,
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How to prevent and control cotton seedling stunting? These methods are worth trying
After cotton is transplanted, it is right in the plum rain season, with low temperatures, many rainy days, and little sunlight, which causes the cotton seedlings to turn green slowly, delays flower bud differentiation, and forms the "stunted seedling" phenomenon. The main types of stunted seedlings are: first, waterlogging-induced stunted seedlings. Commonly seen in low-lying cotton field sections, prolonged overcast and rainy weather causes waterlogging-induced stunted seedlings, leading to blackened roots, grayish-green leaves, and slow growth. Second, drought-induced stunted seedlings. Mainly due to drought, the leaves turn yellow and dry red, there are few new roots, growth is extremely slow, and the proportion of red stems is large. Third, fertilizer-induced stunted seedlings. The main reason is that the base fertilizer is applied too shallowly
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What causes stunted cotton seedlings? A detailed explanation of prevention and control methods
During the transplanting period, cotton is often affected by abnormal weather, weak seedlings, inadequate cultivation measures and other factors, which cause a long slow-seedling period and stunted growth after transplanting, delaying the cotton's growth process and reducing cotton yield. The causes of stunted cotton seedlings and their prevention and control are described below: 1. Causes. 1. Poor cotton seedling quality. ① Insufficient fertilization of the seedbed produces small, weak seedlings with poor growth vigor that establish slowly. ② Improper seedbed management produces leggy seedlings or overgrown seedlings, which lose too much water after transplanting and suffer severe transplanting injury. 2. Unsuitable temperature. In many places
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Causes of Gastrodia elata trait degeneration and control methods
Degeneration of Gastrodia elata traits usually manifests as a decline in the yield of arrow gastrodia, with the individuals becoming smaller and slender; the yields of rice gastrodia and white gastrodia drop substantially, the tubers turn ginger-yellow or light brown, stress resistance is poor, and the original yield and traits cannot be fully expressed. The causes are generally as follows: 1. Multiple generations of asexual propagation. Degeneration generally begins to appear after 5 to 6 generations of asexual propagation, but the speed of degeneration differs when cultivated on different soils; degeneration is slower when cultivated on granite soil, followed by yellow-brown earth sandy soil parent material, and the acidic soil formed by the weathering of shale or limestone.
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What to Do When Oyster Mushrooms Grow Green Mold? Causes and Control Methods
Recently, Li Zhibao, an oyster mushroom grower from Zhumiao Village, Nancheng Town, Xiajin County, Shandong Province, called for advice: This year the oyster mushroom market is good, with a wholesale price of 1.5 yuan/jin, so he invested 20,000 jin of substrate at once to cultivate oyster mushrooms, but now some green things have grown on the oyster mushroom cultivation bags. Experienced people say it is green mold, and he does not know what to do. The author's reply is as follows: Green mold is a major disease in edible mushroom cultivation, mainly occurring on mushroom blocks that have not yet been colonized or on culture substrate that has not been thoroughly sterilized. Green mold is prone to breeding in acidic and relatively humid environments. Its spores spread through the air
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