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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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What are the methods for disinfecting chicken drinking water? Poultry farmers need to master them
1. Bleaching powder: add 6-10 grams per ton of water, mix well and let stand for 30 minutes before drinking. 2. Kangduwei (antiviral disinfectant): dilute at a ratio of 1:5000, stir well and let stand for 2 hours before drinking. 3. Potassium permanganate: use at 0.01% concentration, mix fresh each time for immediate drinking, 2-3 times per week; this agent can also serve as a manganese supplement. 4. Baidusha (disinfectant): dilute 50% Baidusha at a ratio of 1:1000-2000 for chickens to drink. 5. Peracetic acid: 20% peracetic acid, add 1
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How to prevent and control mushroom pests and diseases? These methods you need to master
1. Mushroom brown rot: also known as mushroom Mycogone perniciosa disease, bubble disease, white rot, etc. It is currently the most harmful disease in mushroom cultivation. In addition to harming mushrooms, it can also harm oyster mushrooms, straw mushrooms, silver ear fungus, reishi mushrooms, etc. The disease shows different symptoms at different developmental stages of mushrooms. When mushrooms begin to form small pinhead primordia (before fruiting body differentiation), they are susceptible to infection, forming hard, puffball-like irregular tissue masses. These are covered with a layer of white fluffy mycelium, which later darkens and finally turns dark brown, with dark brown droplets exuding from the diseased tissue. Small mushroom primordia beneath the casing soil can also
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How to prevent fish from oxygen deprivation in winter? These practical methods you need to master
In winter, although the feeding activity of fish in ponds decreases, they still need a certain amount of dissolved oxygen to maintain slow breathing. The dissolved oxygen in a pond mainly comes from the photosynthesis of phytoplankton and the direct dissolution of oxygen from the air into the water. However, in the cold winter, once the pond surface freezes over, oxygen from the air cannot dissolve into the fish pond. When heavy snow covers the ice surface, sunlight cannot shine directly into the pond water, and the green plants in the water cannot carry out photosynthesis to produce oxygen. Moreover, in winter most fish gather at the bottom of the water. If the water quality is poor, the fish are weak, and management is poor, it can easily cause fish to suffocate and die from lack of oxygen.
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How to store garlic scientifically? These methods you need to master
I. Simple storage methods. These mainly include hanging storage, rack storage, cool shed storage, cellar storage, etc. To store garlic by these methods, it must first be pre-stored. After harvesting, arrange the garlic on dry ground and sun-dry it for 2-4 days, so that the leaf sheaths, scales and bulbs are fully dried and dehydrated, reaching about 70% dryness, and when the pseudostem becomes soft, it can be braided, or the root whiskers and pseudostem can be cut off and the heads packed loose. 1. Rack storage. Choose an indoor space with higher ground and good ventilation, place wooden ladders or racks, and hang the braided garlic strings or loose garlic heads in layers on the ladders or racks, taking care to ventilate.
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How to prevent and control lily anthracnose? These methods you need to master
Symptoms: Leaves develop round, pale yellow spots, with dark brown margins. On petals the spots are round and flax-colored. They occur mainly on the outer surface of the upper half of the scales, and also on the inner surface. Initially irregular, light brown spots appear, later becoming light blackish brown and slightly sunken, and finally the diseased area becomes almost black, with the tissue shriveling and dry-rotting. The spots can extend several layers deep into the scales, but the outermost scales are affected most severely. Flower buds on diseased bulbs abort, turning brown to black, or large numbers of small water-soaked round spots appear on the flowers, merging with each other into irregular brown patches
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How to prevent and treat Newcastle disease in chickens? These methods you need to master
Newcastle disease in chickens, also called Asian fowl pest, commonly known as fowl plague, is a highly contagious, acute, and virulent infectious disease of chickens caused by Newcastle disease virus. It often presents as septicemia, with the main features being difficulty breathing, diarrhea, nervous system disorders, and hemorrhage of mucous membranes and serous membranes. I. Epidemiological characteristics: chickens of all breeds and ages can be infected, with young chickens and growing chickens being more susceptible, and older chickens over two years of age having reduced susceptibility. The main sources of infection for this disease are sick chickens and virus-carrying chickens; their secretions, feces, as well as contaminated feed, drinking water, non-susceptible wild birds, external parasites, humans and livestock can all transmit the pathogen. The main routes of transmission are the digestive tract and respiratory tract, and it can also invade the body through damaged skin and mucous membranes. It can occur in all four seasons. In non-immune areas or in flocks with low immunity, once a velogenic strain invades, it can spread rapidly, causing a devastating epidemic, with morbidity and mortality reaching over 90%. At present, in large and medium-sized @#@230@#@ farms, where flocks have a certain level of immunity, Newcastle disease mainly appears in an atypical form, which should be given attention.
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How to select and store sweet potato seed tubers? These methods you need to master
1. Timely harvest: If sweet potatoes are harvested too early, the yield is lower; if harvested too late, they are prone to frost damage, which affects storage. Therefore, it is generally best to begin harvesting when the temperature is around 18°C, and finish harvesting when the temperature is above 10°C (that is, before the frost-kill period). 2. Carefully select tubers: When harvesting and selecting good sweet potato varieties, you must dig and cut carefully to avoid wounds. In order to produce more sprouts, strong sprouts and lower costs, tubers weighing 150-200 g should be selected as seed. The selected tubers must be disease-free, free from flood damage, and also have the typical characteristics of the variety. At harvest,
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How to prevent and control garlic leaf blight? These methods you need to master
Control measures for garlic leaf blight: 1) Promptly remove damaged leaves and flower stalks; 2) Strengthen field management, plant at a reasonable density, drain promptly after rain, and improve the host's disease resistance; 3) Starting at the early stage of the disease, spray 75% chlorothalonil wettable powder at 600 times dilution, or 50% iprodione wettable powder at 1500 times dilution, 64% oxadixyl-mancozeb wettable powder at 500 times dilution, 50% copper sulfate-ammonium salt wettable powder at 500 times dilution, 60% fosetyl-aluminum wettable powder at 500 times dilution, 14% copper ammonia complex aqueous solution at 300 times dilution, 1:1
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How to prevent and treat root rot in rhododendrons? These methods you need to master
Root rot is a serious threat to rhododendrons. Although its incidence rate is not high, the mortality rate after infection is very high, so the prevention and treatment of root rot must be taken seriously in the cultivation and management of rhododendrons. Root rot is a soil-borne disease caused by Fusarium fungi, mostly occurring at the root and stem parts of rhododendrons, because these parts are often moist with insufficient sunlight, and the Deuteromycetes Fusarium fungi are highly active there. Once they invade the cortex, rot soon follows, with water-soaked brown spots and soft rot appearing on the roots, followed by decay and peeling of the bark, the xylem turning dark brown
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