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What are the control methods for common tulip diseases?
Tulip, also known as "foreign lotus," is a bulbous flower of the lily family. It wins people's affection with its bright and rich flower colors, graceful flower posture, long flowering period, and wide variety of cultivars. However, in tulip production, various diseases often occur, which not only cause yield losses but also seriously affect ornamental value. Here we list several common diseases in tulip production and propose control measures combining cultivation management with chemical control. 1 Gray mold 1.1 Symptom identification Mainly harms leaves, flowers and bulbs. After the leaves and flowers are affected, brown spots appear
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Prevention and Treatment Methods and Key Technical Points for Common Diseases in Foxes and Raccoon Dogs
From July to September, breeding foxes and raccoon dogs enter the recovery period, and the young enter the growing period. The common diseases in this period are mainly the following. (1) Heatstroke (sunstroke and heat exhaustion) This disease occurs in the midsummer season, when the temperature is too high and ventilation is poor, and the animal is exposed to direct sunlight, causing brain overheating (sunstroke) or the whole body being stimulated by heat (heat exhaustion). It usually occurs rapidly, and the mortality rate is very high. Foxes and raccoon dogs have extremely underdeveloped sweat glands and dissipate body heat slowly, making it very easy for their body temperature to rise, with listlessness, staggering
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Detailed Explanation of Key Technical Points for Controlling Two Diseases and Three Pests of Rice
The two diseases and three pests of rice refer to rice blast, sheath blight, rice stem borers, rice planthoppers, and the rice red-spotted black spittlebug. They cause great harm to rice and should be given attention for control. Rice blast: Long-term deep water irrigation or excessive drought, and one-sided application of nitrogen fertilizer lead to severe rice blast. There are three susceptible periods in the life of rice, namely the seedling stage, the peak tillering stage, and the heading and full heading stage. Neck blast has the greatest impact on rice yield and should be prevented early at the breaking stage and full heading stage. Rice blast is divided into: seedling blast, leaf blast, node blast, neck blast, and grain blast. Rice blast
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How to prevent and treat common diseases of broodstock? Explained clearly in one article
1. Vibriosis. The pathogen is Vibrio alginolyticus. When fish are affected, they move sluggishly, frequently swim to the surface, and reduce or stop feeding; the ends of the caudal, pelvic and dorsal fins become congested and inflamed, the tissue between the fin rays gradually breaks apart, and in severe cases the fin rays rot; the eyes bulge outward, and the body surface of diseased fish shows ulcerative lesions in variable locations, which in severe cases rot into a deep hole with exposed bone; Vibrio can be isolated from the blood and internal organs, and the mortality rate is relatively high. Prevention and treatment methods: 1) Immunize the fish with a vaccine. 2) Medicated immersion, usually with 100 ppm
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Symptoms and Prevention of Protozoan Diseases in Lionfish
Pathogen: Saltwater Ichthyophthirius, the parasite body is spherical or oval, similar to Ichthyophthirius multifiliis, size 0.066-0.45×0.034-0.36mm, the entire body is covered with cilia, generally with four bead-like macronuclei. Epidemiology: Saltwater Ichthyophthirius mainly parasitizes the gills, skin, fins and other parts of marine fish. It is prevalent in all coastal sea areas from mid-May to August each year. The suitable breeding temperature for Saltwater Ichthyophthirius is 20-25°C, and it is transmitted by *cysts and their larvae. Symptoms: First, a large number of small white
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How to prevent and control sesame diseases in hot and humid weather
Recently, some farmers have reported that some sesame plants show leaves curling upward and wilting, some report that sesame leaves wilt rapidly from the top downward, and others report that sesame leaves wither from the bottom upward. What diseases are these exactly? The farmers cannot figure it out either, and they are all asking agricultural technicians for technical guidance, telling them how to prevent and control these diseases. From the current climate factors, high temperatures accompanied by humidity easily trigger sesame diseases, especially in sesame fields with poor drainage, low-lying terrain, or continuous cropping, which are more susceptible to disease. From the sesame symptoms reported by farmers in various places
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Control Methods and Technical Key Points for Pests and Diseases of Asarum (Wild Ginger)
The main disease is sclerotinia rot, which mainly damages the roots. In the early stage, the base of the root becomes soft and rotting, with white filamentous substances visible, and gradually the aboveground leaves turn yellow, then lodge and die. Spray the leaves or drench the roots with a 500 to 1000 times dilution of 50% carbendazim. The main pest is the black hairy caterpillar, which generally appears in mid to late June. It damages the leaves, and in severe cases the leaves are completely eaten bare. Spray with a 1000 times dilution of dichlorvos or trichlorfon to kill them.
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How to prevent and control several common diseases of straw mushrooms?
① During the mushroom bud formation stage, control the temperature at 25-28°C. When the temperature suddenly drops below 20°C in early autumn, cover the shed with straw curtains for insulation; ② During the mycelium growth stage, the light should be dimmer to prevent strong light stimulation from causing premature mushroom bud formation; pile the straw firmly to help the mycelium connect tightly; ③ During the mycelium growth period, spray rotenone and dichlorvos around the culture material on the mushroom bed to kill pests such as millipedes and woodlice; ④ The spawn must be isolated or introduced every year and stored at a suitable temperature; ⑤ Regularly sprinkle water on the beds around the material blocks or irrigate in the bed furrows to keep the bed moist.
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Key Technical Points for Integrated Control of Rice Diseases, Insect Pests, Weeds and Rodents
1. Suitable areas: all rice-growing areas in Guangdong Province. The rodent control technology is suitable for controlling house mice in agriculture, forestry, livestock and poultry farming, and urban areas of Guangdong Province. 2. Key technical points for rice disease and insect pest control: (1) Agricultural control: A. Select disease- and insect-resistant, high-yielding, high-quality varieties. B. Sow and transplant at the appropriate time. C. Rational close planting and fertilization. For seedling throwing, 40 trays per mu (560 holes) is appropriate; for transplanted fields, about 20,000 hills per mu (6X5 cun), that is, about 80,000-100,000 seedlings, is appropriate. For basal fertilizer, it is recommended to apply more organic fertilizer; according to soil fertility and yield, apply an appropriate amount of nitrogen fertilizer in the early and middle stages (about 10 kg of pure nitrogen per mu), and increase the application of phosphorus and potassium fertilizers.
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Detailed Explanation of Pollution-Free Control Techniques for Rice Pests and Diseases
I. Agricultural Control Agricultural control is the foundation for achieving pollution-free control of rice pests and diseases, and its basic principle is to create an environment that favors crop growth and development while disfavoring the breeding of pests and diseases. 1. Increase the application of organic fertilizers and gradually reduce the amount of chemical fertilizers used. In production, relying solely on chemical fertilizers (especially nitrogenous chemical fertilizers) while neglecting the cultivation, composting and use of organic fertilizers is one of the important reasons for the current severe occurrence of rice pests and diseases. Therefore, it is necessary to change concepts, attach importance to developing animal husbandry, planting green manure crops and composting various types of farmyard manure, and establish a new fertilization model based primarily on organic fertilizers and supplemented by chemical fertilizers. In order to increase the sources of organic fertilizer, it is required to plow and sow green manure or other crops in winter to prevent fields from overwintering fallow. Doing so can not only reduce the overwintering base of the striped stem borer (Chilo suppressalis) and sheath blight sclerotia, but also improve the soil. Organic fertilizer is a complete fertilizer and can comprehensively supply the various nutrient elements needed by crops, but it is also a slow-release fertilizer, and most of the nutrient elements it contains cannot be directly utilized by plants; they must first be decomposed by microorganisms into ammonium nitrogen and inorganic salts before they can be absorbed. The early stage of rice growth is precisely the key period when quick-acting fertilizers (especially nitrogen fertilizer) are needed. If the required nutrients cannot be guaranteed, it will inevitably affect normal tillering, resulting in failure to grow vigorously in the early stage and then delayed maturity with excessive vegetative growth in the later stage. Therefore, when increasing the application of organic fertilizer, attention must be paid to resolving the above contradiction between supply and demand in order to achieve safe nitrogen uptake by rice (that is, continuously and evenly supplying nitrogen fertilizer according to the needs of each growth stage, neither too much nor too little, so that rice grows steadily in the early and middle stages and does not senesce prematurely or grow excessively in the later stage). For example: when green manure is the main fertilizer source, first, the total application amount must be controlled, with about 1000 kg of fresh grass applied per 667 sq m, and not too much; second, when sowing green manure, green manure varieties with different degrees of decomposition difficulty must be mixed and sown; third, plowing must be carried out early at the appropriate time to promote the decomposition of green manure. When barnyard manure and cake fertilizer are the main fertilizer sources, efforts should be made to fully decompose them before application, they should be distributed evenly during application, and attention should be paid to intermittent irrigation after transplanting to promote the decomposition of organic fertilizer. Increasing the application of organic fertilizer does not exclude the use of chemical fertilizers; the two should be combined. At the beginning of tillering, apply 50 kg to 100 kg of silicon-manganese compound fertilizer per 667 sq m in a timely topdressing to promote early and rapid growth and steady development of the seedlings, laying a good foundation for pollution-free rice production.
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