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Zhengdao 18 is a nationally approved new japonica rice variety with high yield, disease resistance and good quality
Zhengdao 18 is a new japonica rice variety with high yield, disease resistance and wide adaptability, bred by the Grain Crops Research Institute of the Henan Academy of Agricultural Sciences. In 2005, plant variety right protection was applied for, with announcement number CNA002221E. It passed Henan provincial approval in 2006 and national approval in August 2007. I. Characteristics: The whole growth period is about 152 days, the plant type is compact, the plant height is 95 cm, growth is vigorous, tillering ability is strong, the earing rate is high, the stems are thick, the leaf color is green, the flag leaf is short and held upright, and the leaf sheath is green; the panicle length is 16 cm, the grains are densely set, the grain shape is short and round, and threshability
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Occurrence and Control Methods of Rice Dwarf Disease in Japonica Rice
I. Damage Symptoms The rice plant becomes stunted, with increased tillering, dark green leaves, and transparent yellowish-white dashed line streaks on young leaves and leaf sheaths. When the disease occurs at the seedling stage, tillering is reduced and the plant cannot head; when it occurs after booting, yellowish-white streaks appear only on the flag leaf or other leaf sheaths, and late-onset plants mostly produce neck-enclosed heads, small heads, many empty and shriveled grains, and a low seed-setting rate. II. Preventive Measures Once japonica rice contracts dwarf disease, it is very difficult to cure, so comprehensive preventive measures should be actively adopted. 1. Select disease-resistant
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Pests and Diseases Increase in Single-Season Rice, Do Not Relax Control Efforts
This year, the single-season rice planting area in our province is 6.0143 million mu. Currently, most single-season rice has entered the late tillering stage to the young panicle differentiation stage. According to recent incomplete statistics from various regions, various pests and diseases have occurred in 2.5 million mu of single-season rice fields, an increase of 40% compared to the same period last year, including 1 million mu of rice planthopper, 500,000 mu of rice leaf roller, 400,000 mu of stem borer, 400,000 mu of sheath blight, and 80,000 mu of rice blast. 1. Rice planthopper: This year, the occurrence of rice planthopper is severe, and the large amount of foreign insect sources migrating in is rare in past years.
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How to prevent and treat fish lice disease in snakehead? A full analysis of practical methods
(1) Pathogen: fish lice. (2) Symptoms: After being parasitized by fish lice, the diseased fish become extremely restless, swimming wildly and jumping about, with increased mucus on the body surface, and are prone to concurrent saprolegniasis and other diseases. The harm to fingerlings is extremely great, and in severe cases it can cause mass death of the diseased fish. The peak incidence period is from May to September each year. It is a common disease of snakehead. (3) Prevention and treatment: Splash 0.4×0.000001 Yuchongqing over the whole pond.
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Detailed Explanation of Prevention and Treatment Methods for Gastrointestinal Diseases in Turtles
Gastrointestinal disease in turtles, also known as gastroenteritis or enteritis, is a common and frequently occurring disease in late spring and during the high-temperature seasons of summer and autumn. 1 Symptoms When turtles first develop gastrointestinal disease, they are listless, move slowly, and their appetite declines until it is completely lost; they only like to drink water. The feces are loose and unformed, yellow-brown, dark brown, or liver-colored. There is abdominal bloating and qi stagnation; in severe cases, there is watery diarrhea with a foul odor, and the pH value is strongly alkaline. In the later stage, the eyeballs sink in, and the skin is dry, loose, inelastic, and lusterless, finally leading to exhaustion and death. Necropsy reveals congestion and inflammation of the gastrointestinal tract. 2 Prevention
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Eel frenzied swimming disease is a viral disease.
[Pathogen] Eel frenzied swimming disease is also known as frenzied running disease, dizzy head disease, etc. The pathogen is eel coronavirus. [Symptoms and pathological changes] Affected eels first show abnormal competition for food, then stop feeding and swim alone away from the group, after which they swim rapidly in a struggling manner at the water surface for a moment, then sink into the water, then rise again and swim in a struggling manner, breathe with the mouth open, and weakly gather at the drainage outlet until death. Sick eels show muscle spasms, twisted bodies, swelling in the liver area, and congestion of the fins and chest. Necropsy shows enlarged liver and severe congestion and hemorrhage in the liver, kidney, and heart. [Epidemiology] Eel
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Prevention and Treatment Methods for Fish Louse Disease in Ayu Farming
Pathogen The pathogen is the fish louse. Symptoms The fish louse parasitizes the body surface and gills of ayu, sucking the blood of the ayu and causing the fish to gradually become emaciated. When feeding, the fish louse pierces the fish's skin with its mouth spines and mandibles, creating many wounds that then become infected with microorganisms, causing death. Prevention and treatment ① Before stocking, the fish pond is cleared with quicklime while still holding water, killing adult lice, larvae and egg masses in the water. ② Bathe the fish in a 30 ppm formalin dilution for 12 hours, for 3 consecutive days. ③ Use trichlorfon 0.
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An Analysis of Common Disease Types in Coral Reef Fish
Signs of infection The fish may rub against hard objects. On close inspection, a fog-like film may be found on the fish's skin, the gills may be inflamed, and affected fish show typical rapid gill movements. Among affected fish, many species of marine fish have been found to suffer from this disease. Details of the infection Oodinium ocellatum is a parasitic single-celled organism known as a dinoflagellate. Careful examination of it requires a microscope with 3000x magnification. Oodinium ocellatum and
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Common Disease Prevention and Control Methods and Key Technical Points for Walking Catfish
I. Trichodiniasis: Large numbers of Trichodina (parasites difficult to see with the naked eye) attach to the gill filaments, damaging gill tissue, affecting respiration, and causing fry to suffocate and die. Prevention and control methods: (1) Per cubic meter of water, use 0.5 g copper sulfate and 0.2 g ferrous sulfate (or 0.7 g copper sulfate alone), dissolve in 40-50°C warm water, and splash over the entire pond. (2) Per cubic meter of water, use 0.5 g of 50% amobam, dissolve in water, and splash over the entire pond. II. Gyrodactyliasis and Dactylogyriasis: These two parasites attach in large numbers to the gills and secrete large amounts of mucus, hindering
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Eel hemorrhagic open-mouth disease is a viral disease.
[Pathogen] The pathogen of eel hemorrhagic open-mouth disease is a DNA-type virus. [Symptoms and pathological changes] Diseased eels show severe hemorrhage, mainly in the cranial cavity, followed by hemorrhage in the oral cavity and head muscles. The diseased fish have osteoporosis and are prone to bone fragmentation, with an "open skylight" appearing in the cranial cavity; the connection between the dentary and the articular bone becomes loose, and the mouth often remains open and cannot close. The liver, spleen, and kidney are enlarged, with extreme anemia. Observation of ultrathin sections of the blood of diseased eels reveals virus particles within the blood cells. [Epidemiology] Eel
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