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Occurrence and Control Methods of Common Cotton Boll Diseases
Cotton boll disease is a composite disease caused by multiple pathogens, often manifesting as boll rot, which affects both cotton yield and cotton quality. Losses caused by boll rot reach more than 10% of total production. Common boll diseases in cotton fields in Henan Province include boll blight, anthracnose, red rot, pink rot, black boll, and others. They mostly occur in rainy years in mid to late August, and are especially severe during consecutive rainy days with high temperature and high humidity. I. Symptoms of Boll Diseases Boll blight: This disease mostly occurs on mature bolls in the lower part of the cotton plant, starting from the base, suture, or tip of the boll. It begins as a dark bluish-green water-soaked area, gradually spreading to the entire boll, turning bluish-brown, and finally becoming black, oily, irregular lesions with gradually lighter edges, and the boundary between diseased and healthy areas is not obvious.
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What causes tomato stem rot? Causes and control methods
Causes of tomato stem rot and control methods
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Prevention and Control Methods and Technical Key Points for Complications in Fingerling Fish
An unusual combination of complications - rotten gills, enteritis and hemorrhage - once occurred in fingerling fish in Sanhe Town, Hongze County, Huai'an City, Jiangsu Province, causing large-scale deaths of fingerlings. The specific details of the disease and its prevention and control measures are summarized below for everyone to discuss together. Onset time and symptoms: In early August, scattered dead fish appeared, and the diseased fish had Trichodina on their gill filaments, with no other symptoms. Around mid-August, mass mortality occurred, and all were grass carp fingerlings. The diseased fish turned dark in body color and showed a behavior of lying at the edge, floating weakly by the pond bank and stopping feeding. When the diseased fish were scooped up
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Forecast of the Occurrence of Diseases and Pests in Shanghai's Two Crops of Wheat and Barley and Their Control Methods
Based on the occurrence base of diseases and pests in the two crops of wheat and barley in each district (county), and in combination with analysis of weather conditions, the occurrence trend of diseases and pests in the two crops of wheat and barley in this city this year is expected to be moderate. Among them, wheat scab will occur moderately, with severe occurrence in some areas; the small brown planthopper will occur severely, with outbreaks in some areas; wheat aphids will occur moderately, wheat powdery mildew and barley scab will occur relatively lightly, and armyworms will occur lightly. In order to effectively control the damage of diseases and pests and secure a bumper harvest of summer-ripening crops, all districts (counties) are requested to conscientiously carry out disease and pest control work for summer-ripening crops in accordance with their own production conditions. I. Analysis of Occurrence Trends
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How to Identify Ginger Bacterial Wilt? Detailed Explanation of Prevention and Control Methods
Ginger bacterial wilt, also known as ginger rot or ginger bacterial blight, is the most serious disease in ginger production. It causes damage from the ginger seedling stage through the ginger rhizome harvest period as well as during storage, and it has a wide host range. The pathogen of ginger bacterial wilt belongs to the bacterium Pseudomonas solanacearum. The primary infection comes from diseased ginger seed or bacteria-carrying soil, and the pathogens from other diseased hosts such as peanut bacterial wilt and tomato bacterial wilt can also be transmitted to ginger. The ginger bacterial wilt pathogen invades through wounds on ginger roots and tubers (mainly insect-bored wounds). The affected roots first appear water-soaked and light brown, and the pathogen moves along the vascular bundles into the ginger rhizome, and the affected
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Symptom Identification and Control Methods of Garlic Leaf Blight
Leaf blight is a major disease of green garlic and, in severe cases, causes the entire leaf to die off, affecting yield. I. Symptom identification This disease mainly damages leaves and flower stalks. When leaves are infected, it usually starts from the leaf tip and gradually develops toward the leaf base, spreading from the bottom upward. At first, pale white small round spots appear, which later expand into oval or irregular grayish-white or grayish-brown lesions, and black mold-like growth develops on the diseased parts; in severe cases, the entire leaf dies off. When flower stalks are infected, they tend to break at the diseased part, and finally many small black grains are scattered on the lesions.
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Causes and Control Methods of Pear Black Heart Disease
In the early stage of the disease, brown patches appear on the outer skin of the fruit core. When the browning gradually expands to the entire core, the flesh shows browning with indistinct boundaries. Affected fruit deteriorates in flavor, seriously affecting the fresh-keeping storage life of Ya pears. Depending on the storage period and conditions, this disease can be divided into two types: early-stage black heart disease and late-stage black heart disease. The former occurs 30-50 d after being placed in cold storage and is considered to be caused by low-temperature injury during storage. The latter usually occurs under earthen cellar storage conditions, mostly around the Spring Festival of the following year, and is preliminarily considered possibly
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Occurrence Patterns and Control Methods of Jujube Fruit Shrink Disease
Jujube fruit shrink disease, also known as black rot, is a new disease of jujube trees. When this disease breaks out severely, it has a serious impact on both the quality and yield of jujube fruit. 1. Symptoms: The disease mainly damages the fruit, causing fruit rot and premature fruit drop. Affected fruit first develop a pale yellow halo on the shoulder or body, which gradually expands into sunken, irregular pale yellow lesions; then the peel becomes water-soaked and infiltrated, with scattered needle-like round brown dots, the flesh turns earthy yellow, loose and soft, and the diseased tissue becomes spongy and necrotic, while the outer peel turns dark red and lusterless. Diseased fruit
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A Detailed Explanation of the Damage Characteristics and Control Methods of the Jujube Geometer Moth
I. What Are the Damage Characteristics and Living Habits of the Jujube Geometer Moth? The jujube geometer moth, also known as the bow-waisted worm, the top-door eater, or the jujube looper. When the larvae crawl, they stretch and contract, hence the name "jujube looper." It is one of the most important insect pests of jujube trees. It is distributed throughout all major jujube-growing regions in China, with the most severe damage occurring in the jujube regions of Hebei, Shandong, Henan and Shanxi provinces. Its larvae are highly voracious, damaging all green tissues of jujube trees, including tender buds, leaves, flower buds, bearing shoots and new branch tips. In severe outbreaks, they can eat all the jujube leaves or buds bare, causing
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Control methods for fascioliasis in deer in grassland areas
Fascioliasis is a parasitic helminth disease that can occur in cattle, sheep, horses, deer, and even humans, and is also commonly called liver fluke disease. In deer farms in grassland areas, although this disease has decreased in recent years, it still occurs from time to time in the deer herds of some breeders. When raising deer in areas where fascioliasis is prevalent, if people lack sufficient awareness of this disease and do not take necessary control measures in production, they may suffer its harm. In summer and autumn, when climatic conditions are suitable and the intermediate host (mainly an amphibious
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