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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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Forecast for the occurrence trend of the first generation of the striped stem borer in rice is released
1. Occurrence level: The first generation of the striped stem borer, the main rice pest in our city, is expected to occur at a moderate-to-severe level, with the affected area in the city reaching more than 250,000 mu, of which more than 50,000 mu are early-planted idle fields. 2. Occurrence period: Moths seen under light on April 11, the beginning of the peak moth emergence period 5/9-12, the peak moth emergence period 5/20-24; the peak egg hatching period 5/27-5/30, the peak period of first and second instar larvae 6/4-6/10, the occurrence period is 3 days later than the average of the past three years. 3. Forecast basis 1. Development progress: This year 4/2
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Symptom Identification and Control Methods of Rice Dwarf Disease
The symptoms are mainly distributed in the southern rice-growing areas. Also known as rice common dwarf disease, common dwarf, green dwarf, etc. After rice is infected from the seedling stage to the tillering stage, the plant becomes dwarfed, tillering increases, leaves are dark green and stiff, and in the later growth stage the diseased rice cannot head or set grain. Diseased leaf symptoms manifest as two types. In the white-spot type, dashed-line-like yellowish-white dotted streak spots parallel to the leaf veins appear on the leaves or leaf sheaths, most obvious at the base. The new leaves above the first diseased leaf all show dotted streaks, while the older leaves below generally do not. In the twisted type, under insufficient light conditions, the heart leaf emerges twisted
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What are the treatment methods for fish hemorrhagic disease?
[Causes] The factors causing goldfish to suffer from hemorrhagic disease are relatively complex, generally triggered by viral, bacterial and environmental factors: 1. Viruses, bacteria (generally considered to be Bacillus monas) and parasites invade the fish body, causing damage to the whole body or part of the fish. 2. Water quality. Whether using tap water to raise fish, or lake water or well water, it must be left to stand or exposed to the sun for 2-3 days before use. If used directly without treatment, at best it will cause congestion of the fins and scales, and at worst it will kill the goldfish. [Symptoms
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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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Disease Occurrence and Prevention Methods for Pigs at Different Feeding Stages
Disease occurrence in pigs at different feeding stages. The incidence of the three major infectious diseases of pigs. Swine fever, swine erysipelas and swine pasteurellosis are collectively known as the three major infectious diseases of pigs. In our country, the total mortality rate of affected pigs accounts for about 8% of the total raised population, and in areas with better prevention and control the pig mortality rate is also 5%. Therefore, the level of pig disease prevention and control should be raised. If the total pig mortality rate could be reduced by one percentage point each year, that would be equivalent to an additional 5 million pigs sent to market - what a huge fortune that would be. According to relevant statistics,
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Comprehensive Prevention and Control Methods and Technical Key Points for Porcine Respiratory Disease Syndrome
This disease is characterized by occurring throughout the year, in an endemic pattern, affecting pigs of all ages, mostly at 13-20 weeks of age, with a course of 2-8 days and a relatively high mortality rate. Symptoms: affected pigs show elevated body temperature of 40.5°C-42°C, depression, reduced or absent appetite, difficulty breathing, sometimes coughing, pale visible mucous membranes, pale or purplish skin, constipation or diarrhea, abortion and stillbirth in pregnant sows, and neurological symptoms in suckling piglets with high mortality. Pathological necropsy: necropsy of 6 dead pigs and 2 severely ill
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New sesame variety Zhongzhi 12: high yield, disease-resistant and high quality
Zhongzhi 12 was developed by the Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences through crossing the introduced foreign sesame variety "CLSU-9" as the female parent with "Yiyangbai" as the male parent, followed by multiple generations of directional selection, and was approved by the Hubei Provincial Crop Variety Approval Committee in 2003. Characteristics: This variety is of the single-stem type, with three flowers per leaf axil and four-angled capsules. The plant is relatively tall, generally about 160 cm in height, and can reach more than 2 m at its tallest. The leaves are green, relatively large, with longer petioles, and the stem is greenish-yellow at maturity
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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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