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What are the prevention and control methods for bighead carp emaciation disease
1. Cause: Due to excessive stocking density and insufficient feed, some fry or fingerlings cannot obtain enough feed and become emaciated and die. 2. Symptoms: The diseased fish has a shrunken, withered body, a large head and a small tail, a back like a knife blade, pale gill filaments, severe anemia, sluggish activity, and a darkened body color, dying not long after. 3. Prevalence: This disease mostly occurs in the later stage of the fingerling rearing phase. Fingerlings in overwintering ponds and overstocked adult fish are affected due to improper stocking density and mixing ratios and insufficient feeding, especially bighead carp.
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Symptoms and Treatment Methods of Aquatic Fungus Disease in Koi
The term "fungal disease" is heard frequently, and there are many examples showing that even in mammals, including humans, this disease is difficult to cure. So-called "fungi" mainly refer to algae-like fungi, or aquatic fungi and filamentous fungi belonging to the Fungi Imperfecti. These fungi attach to the remains of animals and plants, using the remains as a nutrient source, and grow filamentous hyphae. These hyphae belong to lower plants that do not contain chlorophyll, and according to reports from academic societies, there are more than ten types of hyphae, including aquatic fungus disease. What will be discussed here is,
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New japonica rice variety Zhengdao 18 passes national approval, combining 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. In 2006, it passed provincial approval in Henan, and in August 2007 it passed national approval. 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 effective panicle 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
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What are the control methods for bacterial shot hole disease in peach trees?
(1) Damage symptoms. Peach bacterial shot hole disease mainly damages peach leaves, and also infects twigs and fruit. After leaves are affected, nearly round or irregular brown lesions appear, and the lesions gradually dry up and fall off to form shot holes, hence the name shot hole disease. In severe cases, several lesions often join together to form large scorched patches, causing most of the leaf to dry up and resulting in early defoliation, so the disease is also called peach early defoliation disease. (2) Control methods. 1. Strengthen comprehensive management of the peach orchard. Apply more organic fertilizer, avoid
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Prevention and Treatment Methods and Technical Points for Abscess Disease in Snakes
Abscess disease in snakes is caused by infection of wounds on the snake's body. After a snake contracts abscess disease, the wound area swells and becomes ulcerated. When the abscess and ulceration expand to a certain degree, or when the abscess or ulceration prevents the snake from shedding its skin, it can also cause the death of the snake. Abscess disease in snakes is often caused by wounds on the snake's body, such as wounds that appear from snakes biting and fighting each other; injuries and abrasions from snake cages during the transportation of snakes; possible wounds caused when removing snake mites from the snake's body, and so on. If these wounds are not treated in time, they
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Fox and raccoon dog mange mite disease is prone to occur in autumn and winter, and farmers need to prevent and treat it early
In the current season, the breeding of fur animals is entering the fur growth period. In addition to meeting the various nutrients required for fur growth, special attention should be paid to the occurrence of external parasitic diseases. Zhaoyuan Farm has 100,000 foxes and raccoon dogs on hand and has rich experience in the prevention and treatment of mange mite disease. The precautions are introduced as follows: Pay attention to observation. Skin diseases such as mange mite disease cause great harm to fur animal breeding. It should attract sufficient attention from the majority of breeding farms and farmers, especially in the current winter fur growth season. Inspection and prevention and treatment of mange is a task that farmers cannot ignore before pelting.
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Control Methods for Several Diseases of Phalaenopsis
Anthracnose is severe under high temperature and high humidity, forming brown-black round spots that gradually expand outward. Spray evenly with Previcur 800 times solution, once every 5 days, for 2 to 3 consecutive sprays, to bring the disease under control. Soft rot symptoms are rot at the leaf base, rot of the pseudobulb, with a musty bacterial odor. Control method: spray agricultural streptomycin sulfate 4000 to 5000 times solution at the early stage of disease, once every 7 days, for a total of 2 to 3 sprays. Sclerotinia disease symptoms first appear at the leaf base, with light brown, water-soaked lesions that rot and can spread to the whole
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Comprehensive Control Methods for Damping-Off Disease in Spruce Seedlings Grown in Greenhouse Tunnels
In high-cold mountain areas, greenhouse tunnel seedling cultivation is usually adopted to shorten the cultivation period of spruce seedlings and enable earlier out-planting. The special environment of the greenhouse tunnel creates conditions for the breeding and spread of various pathogenic bacteria and organisms that cause damping-off in newly sown spruce seedlings, and improper control can lead to failure of seedling cultivation. To control damping-off in newly sown spruce seedlings in greenhouse tunnels, the policy of "prevention first, comprehensive control" must be adhered to. 1 Damping-off symptoms The symptoms of damping-off mainly manifest in 4 types: (1) After sowing but before emergence, seeds and ungerminated sprouts rot and die in the soil,
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How to prevent and control pests and diseases of oleander? A detailed guide to practical methods
1. After aphids are found, spray the plants with a 40% dichlorvos emulsion at 800 times dilution, or with water in which cigarette butts have been soaked; when there are only a few, they can also be brushed off. For other control methods, refer to the pest and disease control section for Chinese rose and scarlet sage. 2. Scale insects damage the branches and leaves. Control method: spray the plants with Jiesha at 2000 times dilution. For other control methods, refer to pest and disease control for crape myrtle. 3. Black spot disease This disease occurs easily under high temperature and high humidity and damages the leaves. After it appears, spray with 50% carbendazim at 500 times dilution or thiophanate-methyl at 600 times dilution. For other control methods
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What are the control methods for the 4 types of edible mushroom diseases?
1. Brown rot. Also known as bubble disease and wet bubble disease. It mainly harms button mushrooms, straw mushrooms, oyster mushrooms, etc. The disease is caused by the pathogen Mycogone perniciosa. Main characteristics: the conidia and chlamydospores of Mycogone perniciosa only infect the fruiting body, not the mycelium. When the fruiting body is lightly infected, the stipe swells into a bubble-like deformity, hence the name wet bubble disease. However, at different stages of fruiting body development, the symptoms also differ. If infection occurs before the fruiting body differentiates, there is an irregular mass of tissue resembling a hard-skinned puffball, covered with white cottony mycelium, which gradually turns dark
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