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What are the characteristics and common species of plants in the Taxaceae family?
Latin scientific name: Taxaceae English name: Yew Family, Taxus Family Introduction: Evergreen trees or shrubs. Leaves arranged spirally or decussate, linear or lanceolate. Dioecious, rarely monoecious. Male cones solitary in leaf axils or bract axils, or arranged in spike-like strobili clustered at the tips of branches; stamens numerous, each with 3-9 anthers, anther locules dehiscing longitudinally, pollen without air sacs; female cones solitary or in pairs opposite in leaf axils or bract axils, base with numerous imbricate or decussate bracts, ovule 1, erect, borne
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What varieties of yew are there? Detailed introduction to common varieties
Distribution and species of yew: Except for Austrotaxus Spicata from Australia, which is native to the southern hemisphere, all other yews are native to the northern hemisphere. China has 4 species and 1 variety of yew, distributed across most parts of the country. The Japanese yew is mainly distributed in the Changbai Mountains of Jilin Province and the Heilongjiang area, with a small amount also found in the mountainous areas of eastern Liaoning. The Yunnan yew is mainly distributed in western Yunnan and 16 counties across prefectures, with a total area of about 90,000 sq km. Its characteristics are wide distribution, scattered growth, no pure forests, and it is mostly scattered trees in forests. Southern
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Common Rhododendron Diseases and Detailed Symptoms
1. Leaf gall disease. Before onset, especially when new shoots emerge and leaves unfold, spray Bordeaux mixture at 1:1:200, and promptly remove diseased leaves when found; before budding, spray 0.3-0.5 Baume degree lime sulfur mixture or Bordeaux mixture at 1:1:200 2-3 times, usually once every 7-10 days; after onset, spray 65-80% mancozeb 500x solution or 0.3-0.5 Baume degree lime sulfur mixture 3-4 times, once every 7-10 days. 2. Leaf spot disease and brown spot disease. From May to August, spray 7
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How should the four common bean diseases be prevented and controlled?
1. Root drowning: Beans prefer moisture and tolerate drought but not waterlogging. Therefore, on the basis of ridge cultivation, small amounts of water should be applied to avoid water accumulation in the field, which prevents the roots from breathing and causes plant death. Control measures: Avoid flood irrigation. If there is heavy rain, drain the water promptly. After the weather clears, if conditions permit, appropriate shallow hoeing can be done to increase soil permeability and improve root vitality. 2. Phytophthora blight: It mainly damages the stems and vines, and sometimes the leaves and pods are also affected. It constricts at the base of the stem, causing the upper part to wilt and die. When humidity is high, white mycelium is produced on the diseased part.
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Detailed Explanation of Common Causes of Silkworm Poisoning and Preventive Measures
During sericulture, poisoning sometimes occurs, which at best affects the growth and development of silkworms and at worst causes mass death. Therefore, silkworm farmers must pay attention to it and take measures to avoid losses. 1. Gas poisoning During the incubation period of silkworm eggs or the first and second instars of young silkworms, the temperature in the silkworm room is low and heating is required. If coal products are used for heating and there is no exhaust facility on the coal stove, the toxic gases produced, such as carbon dioxide, hydrogen sulfide, and carbon monoxide, accumulate in the silkworm room and can cause poisoning of silkworm eggs and young silkworms. If silkworm eggs are poisoned during the incubation period, dead eggs or uneven hatching are likely to occur.
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Common diseases of the tea tree mushroom and their control methods
The tea tree mushroom is a rare mushroom variety that has become very popular in domestic and international markets in recent years, but because pest and disease problems occur rather frequently, growers often fail to accurately identify the symptoms and pathogens and blindly apply chemical pesticides, which damages the mushrooms and leads to poor cultivation returns. The symptoms, pathogens and control measures of common infectious diseases are described below: 1. Brown rot. Affected fruiting bodies stop growing, and the caps and stipes rot and give off a foul odor. The pathogen is Mycogone perniciosa, which causes disease mainly through contaminated water or through contact with the hands, tools and other items that have touched diseased mushrooms.
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How to propagate Lycoris longituba? Introduction to common methods
Lycoris longituba is native to eastern China, with wild populations distributed in the middle and lower reaches of the Yangtze River. It is highly cold-tolerant and prefers shady, moist conditions. However, it also grows well in sunny spots. Well-drained, fertile sandy loam is the best soil. It has strong stress resistance and is easy to cultivate. Propagation: Division and seed sowing are commonly used. For division, dig up the plants when the leaves or flower stems have just withered, then separate the bulbs. Planting depth is 10 cm; the contractile roots can automatically adjust the depth of the bulbs. For seed propagation, sow immediately after collecting the seeds. With autumn sowing, by the following spring the young roots germinate and
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What are the commonly used chemical control methods for stored-grain pests?
1. Pirimiphos-methyl: Pirimiphos-methyl is an internationally preferred grain protectant, with the chemical name methyl pyrimidinyl (thio) phosphate, and the usual dose for controlling stored-grain pests is generally 5 ppm. 2. Baolianglin: Baolianglin is a grain protectant developed by the Chengdu Grain Storage Research Institute of the State Administration of Grain, and it has a very good control effect on stored-grain pests, especially suitable for rural grain storage. The ratio of Baolianglin to raw grain is 1:2500. That is, each 100-gram bag of Baolianglin can be mixed with 250 kg of raw grain.
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Several commonly used green and environmentally friendly fishery drugs in aquaculture
Quicklime, table salt, and the like are not dedicated fishery drugs, but they are highly effective for preventing and treating aquatic diseases, pose no threat to the environment, and leave no drug residue problems. Quicklime: Regularly splashing quicklime into aquaculture water bodies can not only reduce the occurrence of many diseases, but also provide the calcium element essential for cultured organisms, which is especially important for crustacean aquaculture. Method of use: Choose quicklime that has not weathered; for pond clearing and disinfection, use 150-200 kg per mu; for disease prevention and treatment, generally 5-9, use once about every 20 days
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Prevention and Treatment Methods for Common Diseases in Large Yellow Croaker Aquaculture
Benedenia Disease [Cause] The disease is caused by parasitism of Benedenia.[Symptoms] Benedenia often parasitizes various parts of the body surface of marine fish such as large yellow croaker, yellowfin seabream, red seabream, black seabream, and grouper, especially the front half of the back. When Benedenia parasitizes the fish body, the fish are restless in the water, constantly swim frantically, rub against nets or pond walls; the large and small hooks of the worm's posterior attachment disc tear the epidermis, causing wounds and inflammation on the body surface, secreting large amounts of mucus; in severe cases, anemia, emaciation, localized or large-area ulcers on the body surface, or occurrence of
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