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Pear orchard pest and disease control methods and key technical points
Currently the pear orchard is in full bloom. At the end of the pear tree flowering period, fruit growers should promptly control the following pests and diseases: For pear gall midge and pear psylla, according to the flowering situation of the pear trees, spray for control promptly when flowering is basically finished. For the pesticide, 10% Shenjian 1500x solution plus 10% Shijia Bichlor 2000x solution can be used. For pear rust and pear scab, spray for control promptly at the end of pear tree flowering. For the pesticide, 15% Fenxiuning 1500x solution or 45% Dason 800-1000x solution, plus 10% Shigao 6000x solution, can be used.
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Key Points of Agricultural Control Techniques for Pear Orchard Pests and Diseases
Mainly apply organic fertilizer and inorganic compound fertilizer to enhance the tree's disease resistance and worsen the nutrition of piercing-sucking pests; control the application rate of nitrogen fertilizer to inhibit the reproduction of pests such as phytophagous mites and aphids, and reduce the harm of diseases such as ring rot and scab; pay attention to water control and drainage in the later part of the growing season to prevent excessive vegetative growth, so as to avoid serious occurrence of freezing injury and rot disease; strictly thin flowers and fruits, maintain a reasonable load, and keep the tree vigor strong; before bud break, scrape off the cracked and old bark on branches and trunks, clear away dead branches and fallen leaves, and eliminate overwintering pests and diseases; in the growing season, remove diseased and pest-infested leaves and fruits as early as possible, and in combination with
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Occurrence Patterns and Control Techniques of Jujube Iron-Skin Disease
Jujube iron-skin disease, also known as fruit-shrinking disease and black rot, commonly called wu zhuo, wu liao tou, dry waist, black waist, iron scorch, fire head, etc., is a fruit disease that seriously harms jujube trees. Since the early 1980s, the damage from this disease has become increasingly severe. It begins around the coloring stage, develops rapidly and in concentrated fashion, and often breaks out in epidemics. It occurs in many jujube-producing areas including Hebei, Henan, Shandong, Shanxi, Inner Mongolia, Guangxi and Sichuan. In normal years the disease causes yield losses of 20%-50%, and in severe years losses reach 70%-80%, or even
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How to prevent and control barley yellow leaf disease? Detailed explanation of occurrence and control measures
In recent years, barley yellow leaf disease has become increasingly serious in the northern Jiangsu region, often leading to reduced yield and quality, and in some areas even severe seedling death, forcing plowing and replanting. From 1992 to 1995, the author conducted organized surveys of 1466.7-1866.7 hectares of two-row barley planted in the coastal reclamation area of northern Jiangsu and carried out trials of planting disease-resistant varieties, analyzing the relationship between the occurrence and spread of yellow leaf disease and factors such as variety, sowing date, tillage and cultivation, and climate. The report is as follows: 1 Main factors affecting the occurrence of barley yellow leaf disease
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Disease- and pest-resistant japonica rice successfully bred in Jiangsu
A breakthrough has been achieved in the "Breeding of New Multi-Resistant, High-Yield and High-Quality Japonica Rice Varieties" carried out through cooperation between the Bokun Agricultural Research Institute of Yixing City, Jiangsu Province, and the China National Rice Research Institute and other institutions. New high-yield, high-quality japonica rice lines such as 4701 and 4714 have been successfully bred with resistance to brown planthopper, rice blast and other pests and diseases. It is reported that the bred high-yield, high-quality japonica rice lines combine genes for resistance to brown planthopper, white-backed planthopper, rice blast and stripe leaf blight, as well as specific genes for high yield and high quality. Testing has shown that these high-quality japonica rice lines are resistant to brown planthopper,
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Detailed Explanation of Prevention and Treatment Methods for Common Diseases in Turtles
Turtles have strong vitality and disease resistance, and suffer from relatively few illnesses. However, under artificial rearing conditions, various diseases can sometimes occur due to the influence of multiple factors such as rearing site, temperature, and feed. Therefore, routine observation is necessary, and once abnormalities are found, timely and targeted treatment should be applied to avoid economic losses. The following is an introduction to the prevention and treatment methods for common turtle diseases summarized over 10 years by Jiang Zhanglin, the "Turtle Farming King" at Longtouge Animal Farm in Yuanhua Town, Haining City, Zhejiang Province: 1. Trauma and Inflammation. Due to the rough surface of the rearing pond
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How to prevent and treat hemorrhagic ascites disease in bighead carp? A detailed guide to prevention and treatment strategies
As bighead carp has gradually become popular in the market, most ponds on the outskirts of our city have shifted from raising bighead carp as a secondary species to raising them as the main species. Bighead carp yields have grown from several dozen jin per mu when raised as a secondary species to over a thousand jin per mu now that they are the main species. Due to the increase in bighead carp farming density, the disease rate in bighead carp has also risen year by year, and mortality has climbed continuously, causing certain economic losses to farmers. Hemorrhagic ascites disease in bighead carp is an explosive infectious disease, also known as bacterial septicemia, and is caused by bacteria. Before the diseased fish die, they mostly swim slowly around the pond with darkened backs, and the mouths of the diseased fish
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Stocking fish fingerlings in cages in autumn has many benefits, and the timing of release matters
After autumn fertilization in the pond, fish fingerlings are generally in robust health and adapt easily to the cage environment. At the same time, overwintering in sunken cages in large water bodies not only consumes less body weight in the fingerlings than overwintering in ponds, but also, after overwintering ends and the cages are raised in spring, the fish begin feeding earlier, and their growth period is extended by about 1 month compared with fish stocked in spring, so the fish grow quickly and production increases noticeably. Compared with fingerlings stocked in spring, fingerlings overwintered in sunken cages grow about 30% faster and are about 35% larger in size when removed from the cages. Therefore, stocking fingerlings in cages in autumn for overwintering is a relatively scientific
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Prevention and Treatment of Common Bacterial Diseases in Fish
1. Hemorrhagic disease Causes: Deterioration of water quality at the bottom of the fish pond, low dissolved oxygen, high levels of harmful substances, poor aquaculture management, or feeding moldy and inferior bait can all trigger this disease. Prevention and treatment methods: Strengthen feeding management and carry out comprehensive prevention. Use medications regularly; dibromohydantoin, bromochlorohydantoin, herbal extract preparations, etc. can be used to disinfect the water body; or use beneficial bacteria such as photosynthetic bacteria to purify water quality; add immunostimulants to the bait, and use zeolite powder and nitrite degrading agents to absorb and degrade harmful substances such as ammonia, nitrogen and nitrite in the water. After the disease occurs
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What are the prevention and treatment methods for sheep Clostridium welchii disease?
Between February and March 2002, at a sheep farm in a certain city, lambs less than 2 months old suddenly fell ill one after another, and died within less than 2 h despite treatment. 1 Clinical symptoms: The affected sheep separated from the flock, lay down alone in a crouched position, and were unwilling to move; when forced to move, they showed weakness and incoordination, abdominal distension, and mild symptoms of lying down and getting up. One had difficulty defecating, and one had tenesmus, with black, softened feces mixed with mucus and sloughed mucous membrane, and occasional blood streaks. One sheep had a body temperature of 38.5°C, and the other two had 40.5°C and 4
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