-
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
-
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
-
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
-
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
-
Potato Disease Prevention and Control Methods and Cultivation Techniques
I. Late Blight (1) Conditions for Onset. Potato late blight, also known as blight or potato plague, is a devastating disease of potatoes. In plots that are low-lying, poorly drained, and have high field humidity, or in plots with excessive nitrogen fertilizer application, the disease tends to be severe. When temperature and humidity are suitable, late blight spreads rapidly, and diseased plants wither and die in patches. (2) Symptoms. On affected leaves, round or irregular dark green water-soaked spots first appear at the leaf tips and margins. After expanding, they become large brown lesions. When humidity is high, a ring of
-
The culprit behind potato zebra chip disease is the potato psyllid
The potato psyllid is the culprit behind potato "zebra chip" disease. October 26 news: research by the U.S. Agricultural Research Service has found that the cicada-like insect, the potato psyllid, is the culprit behind potato "zebra chip (ZC)" disease. Zebra chip (ZC) refers to a type of black streaking that appears on potato tubers. This zebra chip disease broke out in Mexico in 2004-2006 and caused millions of dollars in losses for growers in the U.S. state of Texas. Researchers are currently preventing zebra chip disease by monitoring potato psyllids and spraying insecticides. In
-
Winter prevention methods for rabbit Bordetella bronchiseptica disease
Rabbit Bordetella bronchiseptica disease, also called rabbit bronchial septic Bordetella bronchiseptica disease, is a common respiratory infectious disease of rabbits caused by Bordetella bronchiseptica. The disease is characterized by chronic rhinitis, bronchopneumonia and pharyngitis. This disease occurs frequently in autumn and winter and early spring. It is mainly spread through the air and infects via the respiratory tract. The incidence rate is high in young rabbits, and there are fatal cases. Adult rabbits are less commonly affected. This bacterium contaminates 64.4% of group-raised rabbits and 20% of free-range rabbits. Under natural conditions, this bacterium is parasitic in the upper respiratory tract of many kinds of mammals, often causing mutual infection of chronic respiratory diseases.
-
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
-
What is tulip breaking virus disease
Tulip breaking virus disease is an ancient and well-known worldwide viral disease, occurring in all tulip-growing areas. In China, it occurs in cities such as Shanghai, Beijing, Xiamen, Fuzhou and Chengdu. Tulip breaking virus disease causes bulb degeneration, smaller flowers, and single solid flower colors turning variegated. When the disease is severe, there is a risk of destroying the stock. Symptoms: The disease damages the leaves and corolla of the plant. Infected plants develop light green or grayish-white stripes on the leaves, sometimes forming a mosaic pattern. Petals become deformed; because viral infection affects anthocyanin formation,
-
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
条件筛选