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What are the control methods for seed-borne diseases of the three wheats?
The main seed-borne diseases of the "three wheats" are stripe disease, smut, and net blotch. To control these diseases, in addition to measures such as selecting disease-resistant varieties, crop rotation, and adjusting sowing dates, the key is to do a good job of seed treatment. Seed treatment can use the following methods: (1) Use 12.5 milliliters of 10% seed soaking agent, add 4 kg of water, and mix with 50 kg of seeds; or use 100 grams of 2% Silvacur, add 4 kg of water, and mix with 100 kg of seeds, which can control stripe disease and smut. (2) Use 150 grams of 2% Silvacur, add
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Identification and Control Methods for the Russian Wheat Aphid
Scientific name Diuraphis noxia (Mordvilko), order Homoptera, family Aphididae. Synonym Brachycolus noxius. Also known as the Russian wheat aphid. Distribution in **. In addition, the Liaohe, Yellow River, Huaihe and Haihe river basins are all suitable areas for this insect. Abroad it is mainly distributed in Ukraine, Central Asia, North Africa, Eastern Europe, Nepal, South Africa, Mexico, the United States and Canada. It is a worldwide major pest of wheat. It is a domestic quarantine target. Hosts: wheat, barley, rye, oats, wild oats, brome
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Detailed Explanation of Common Disease Prevention and Control Methods for Fish and Crabs, a Must-Read for Farmers
I. Grass carp hemorrhagic disease. Symptoms: bleeding in the fins, mouth, eye sockets, muscles, and intestines, partially or entirely bright red. Prevention and control: 1. Splash dibromohydantoin or chlorine dioxide over the entire pond, using 200 grams of dibromohydantoin or chlorine dioxide per 1 mu of water surface with a depth of 1 m. Apply once more after 2-3 days. 2. Mix Yu'erkang into bait and feed, mixing 1 kg of Yu'erkang per 50 kg of feed, and feed continuously for three days. 3. Mix Suke into bait and feed, mixing 50 grams of Suke per 50 kg of feed, feeding once a day, with three consecutive days as one treatment course. If combined with external use of dibromohydantoin
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Autumn Prevention and Control Methods for Fish Fulminant Hemorrhagic Disease
Fish are prone to fulminant hemorrhagic disease in autumn. This disease has a sudden onset, spreads quickly, and has a long epidemic duration, with a high mortality rate and heavy losses. Once it breaks out, it is difficult to control, and the condition tends to recur. Fish farmers should strengthen their awareness of prevention to prevent the occurrence of this disease. 1. Disinfection of fingerlings Before fingerlings are stocked into ponds, they must be soaked and disinfected in 1% to 2% salt water. The soaking time depends on the fish's constitution and the temperature. When conditions permit, fingerlings can be soaked with fulminant hemorrhagic disease vaccine. 2. Timely water exchange and oxygen enhancement The water quality must be kept fresh,
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Control Methods and Technical Key Points for Soft-shelled Turtle Diseases
Soft-shelled turtles have strong adaptability and resistance, and diseases rarely occur in farming production; however, improper feeding and management can also lead to disease. Common soft-shelled turtle diseases include: Red Neck Disease, caused by Aeromonas bacteria. The main symptoms are loss of appetite, sluggish movement, red and swollen congested neck that extends and cannot retract, red spots appearing on the abdomen, sometimes floating on the water surface, sometimes crouching on sandy ground. In severe cases, bleeding from the mouth and nose, intestinal inflammation and putrefaction, generalized redness and swelling, cloudy white eyes with blindness, enlarged liver and spleen, and
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What is yellow fat disease in pigs? A detailed explanation of causes, diagnosis, and prevention and control methods
1. The concept of yellow fat disease in pigs. Yellow fat disease in pigs is a pigmentation disorder characterized by a yellow appearance of the pig's adipose tissue, commonly known as "yellow fat," and sometimes also called yellow fat disease or nutritional panniculitis. In pork whose subcutaneous fat turns yellow after slaughter, if it is caused by feed it is called "yellow fat pork," and if it is caused by disease it is called "jaundice pork." 2. Causes of yellow fat disease in pigs. There are mainly 2 causes that induce yellow fat disease in pigs: one is pathological, called jaundice, which includes parenchymal jaundice, obstructive jaundice
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Control Methods and Technical Key Points for Cotton "Double Rot" Disease
Rotten bolls and rotten peaches are common, frequently occurring diseases of cotton that seriously affect cotton yield and quality. People customarily call these two diseases "double rot disease." (1) Causes 1. Excessive or too-late application of nitrogen fertilizer causes excessive cotton growth and a closed, shaded field, which weakens the disease resistance of cotton plants. 2. During the flowering and boll stage, cotton encounters heavy rainstorms or excessive autumn rain, field humidity is too high, and drainage is poor, causing pathogens to breed and invade. 3. Cotton is attacked by red rot, anthracnose, boll blight, and other diseases. (2
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What are the control methods for root rot in Schisandra chinensis?
Root rot in Schisandra chinensis, commonly known as "rotten neck" disease or "strangle neck" disease, is one of the main diseases in Schisandra chinensis cultivation. At present, the affected area is relatively widespread and the damage is relatively severe. The disease generally occurs from May to early August. When the disease begins, the epidermis at the junction of the root and the ground (the root crown area) turns black, and further the cortex rots and falls off, forming a ring, the leaves wilt, and after a few days the entire plant dies. The cause of the disease is related to a physiological disorder. In early spring and late autumn, the ground temperature changes drastically between day and night, with a large temperature difference; the tissue at the root crown area is tender, disease resistance is reduced, and the cortex is damaged by freezing and infected by fungi, all of which can cause rot and disease. Waterlogged, low-lying land and relatively heavy clay soil have severe disease incidence, and plants that are not robust in growth and have poor vine maturity have more severe disease incidence.
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What are the control methods for schisandra phytotoxicity?
In recent years, phytotoxicity from pesticides has frequently occurred in the large numbers of schisandra plants cultivated across various regions. In mild cases it reduces yield, and in severe cases it causes total crop failure and no harvest for the entire orchard, so sufficient attention should be paid to it. The common acute phytotoxicity in schisandra is mainly caused by improper pesticide application and pesticide drift. Phytotoxicity in schisandra caused by pesticide drift is mainly the result of using the 2,4-D butyl ester herbicide in corn fields and wheat fields. Wu Zhongsheng of Xiagou Village, Wangshi Town, Haicheng City, planted 100 mu of schisandra and once suffered phytotoxicity from 2,4-D butyl ester drift, resulting in total crop failure and no harvest for the entire orchard that year. Schisandra is highly sensitive to the herbicide 2,4
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What are the control methods for powdery mildew on Schisandra chinensis?
1. Disease symptoms: Powdery mildew damages the leaves, fruits and new shoots of Schisandra chinensis, with young leaves and young fruits suffering the most severe damage. It often causes leaves to dry up, new shoots to die back and fruits to drop. In the early stage of leaf infection, needle-like spots appear on the underside of the leaves, gradually covered with a layer of white powdery substance, and in severe cases it spreads to the entire leaf. Diseased leaves turn from green to yellow, curl upward, wither and drop. Young fruit infection starts near the rachis, and in severe cases gradually spreads outward to the entire fruit cluster; diseased fruits become wilted and drop, and dark brown spots appear on the fruit stalk and new shoots. In the late stage of the disease,
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