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Comprehensive Prevention and Control Methods and Technical Key Points for Porcine Respiratory Disease Syndrome
This disease is characterized by occurring throughout the year, in an endemic pattern, affecting pigs of all ages, mostly at 13-20 weeks of age, with a course of 2-8 days and a relatively high mortality rate. Symptoms: affected pigs show elevated body temperature of 40.5°C-42°C, depression, reduced or absent appetite, difficulty breathing, sometimes coughing, pale visible mucous membranes, pale or purplish skin, constipation or diarrhea, abortion and stillbirth in pregnant sows, and neurological symptoms in suckling piglets with high mortality. Pathological necropsy: necropsy of 6 dead pigs and 2 severely ill
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How to prevent and control sesame diseases in hot and humid weather
Recently, some farmers have reported that some sesame plants show leaves curling upward and wilting, some report that sesame leaves wilt rapidly from the top downward, and others report that sesame leaves wither from the bottom upward. What diseases are these exactly? The farmers cannot figure it out either, and they are all asking agricultural technicians for technical guidance, telling them how to prevent and control these diseases. From the current climate factors, high temperatures accompanied by humidity easily trigger sesame diseases, especially in sesame fields with poor drainage, low-lying terrain, or continuous cropping, which are more susceptible to disease. From the sesame symptoms reported by farmers in various places
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How to prevent and control cotton root rot in northern Xinjiang? Understanding the patterns of occurrence is key
In 2007, northern Xinjiang suffered varying degrees of cooling and rainfall in April, May and August respectively, and cotton root rot occurred rather severely, with the disease incidence in cotton fields reaching 20%-50%, causing a certain impact on cotton yield in northern Xinjiang. 1. Disease symptoms The pathogen overwinters as chlamydospores on plant residues in the soil and germinates to infect the following year. After cotton is infected, the leaves shrink or wilt, and soon afterward the plant lodges and dies. The stem base and roots of diseased seedlings are purplish brown and gradually rot, with the cortex drying and rotting; when pulled from the soil, the roots are decayed brown.
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How to prevent and control soybean root rot? These methods you need to master
1. Choose disease-resistant varieties. 2. Rotate with non-host crops such as corn, foxtail millet, and sweet potato. 3. Apply farmyard manure, potassium fertilizer, phosphate fertilizer, etc. when sowing. 4. Apply metalaxyl granules when sowing so that soybean roots can absorb them to prevent root infection. 5. Before sowing, dress seeds with 35% metalaxyl powder at 0.3% of seed weight. 6. Strengthen field management, carry out timely deep plowing and intertillage hilling and weeding, and drain standing water promptly after rain to prevent excessive humidity. 7. When diseased plants are found, pull them out promptly, thoroughly remove the diseased plant residues, and apply quicklime to the planting holes and
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How to prevent and control soybean root rot? Detailed prevention and control techniques for Heilongjiang
Root rot occurs commonly in the soybean-producing areas of Heilongjiang Province. In the field, the usual rate of diseased plants is 30%-40%; in low-lying land and continuous-cropping land, the rate of diseased plants can reach more than 70%, and the highest seedling death rate is more than 15%. The eastern region is more severely affected than the western region, with the most severe occurrence in the moist-soil areas of the east. In an ordinary year, the rate of diseased plants in the early growth period of soybean (before the flowering stage) is about 75%, and the disease index is 35%-50%; in rainy years, the disease index can reach more than 60%. The occurrence of soybean root rot mainly depends on the bacteria in the soil
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Rot of Pinellia ternata tubers in the late growth stage: growers need to pay attention to prevention and control
Causes of the disease: When Pinellia ternata grows to August-October, that is, when the rainy season arrives, the second-, third- and fourth-generation bulbils formed by Pinellia ternata planted in early spring and the first- and second-generation bulbils formed by Pinellia ternata cultivated in summer rapidly expand and form tubers, and the small mother corms used as seed during cultivation are also expanding themselves. This period is the stage of fastest tuber growth in Pinellia ternata, and also the period when the tubers have the weakest ability to resist external infection. The larger the tuber, the weaker its resistance; the smaller the tuber and the bulbils, the stronger their defensive ability. Underground Pinellia ternata of various specifications
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How to prevent and control several common diseases of straw mushrooms?
① During the mushroom bud formation stage, control the temperature at 25-28°C. When the temperature suddenly drops below 20°C in early autumn, cover the shed with straw curtains for insulation; ② During the mycelium growth stage, the light should be dimmer to prevent strong light stimulation from causing premature mushroom bud formation; pile the straw firmly to help the mycelium connect tightly; ③ During the mycelium growth period, spray rotenone and dichlorvos around the culture material on the mushroom bed to kill pests such as millipedes and woodlice; ④ The spawn must be isolated or introduced every year and stored at a suitable temperature; ⑤ Regularly sprinkle water on the beds around the material blocks or irrigate in the bed furrows to keep the bed moist.
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How to prevent and treat tulip leaf blight? A few practical methods to teach you
Symptoms: Infected leaf buds develop poorly, appearing deformed and curled; once young buds are affected, the leaves that grow from them become curled. If the environment is humid, a large number of gray mold-like conidia are produced on the diseased tissue, spreading to nearby healthy plants and causing leaf infection, so bulb growth is greatly affected. After flowers are affected, white or light yellowish-brown lesions first appear, then rapidly expand and cause the flowers to wither and drop, or turn brown and dry up. Ring-like bands also appear on the flower stalk, sometimes with a layer of conidia on them. At every stage of the disease
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Tulip Blindness Prevention and Cut Flower Production Techniques
Tulip (Tulipa gesneriana L.), also known as foreign lotus and grass musk, is a perennial bulbous ornamental flower of the genus Tulipa in the Liliaceae family. It is one of the most famous flower varieties in the world today and has long been known as the "king of flowers" [1,2,3]. China still lags behind in box-type cut flower production technology, the causes of blindness formation, and prevention techniques for tulips, which has restricted the development of tulip cut flower production. The flower base of the Hebei Academy of Forestry Sciences, while vigorously developing soilless cultivation of tulips, has conducted preliminary research on
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How to Diagnose and Prevent Canine Clonorchiasis
Canine clonorchiasis is a parasitic disease caused by Clonorchis sinensis (C. sinensis) of the genus Clonorchis, family Opisthorchiidae, parasitizing the gallbladder and bile ducts of dogs. The disease is widely distributed in China, with reports from more than 20 provinces and municipalities, and it is most severe in the southern provinces. There have been few reports of this disease in the northern Liaoning region. Since the summer and autumn of 2001, the author has noticed that the disease occurs from time to time in this region and should be taken seriously.
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