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Pest and disease control methods during jasmine cultivation
During the growth period, jasmine diseases include: jasmine stem rot and southern blight; pests include: jasmine leaf borer, scale insects, and carmine spider mite. (1) Jasmine stem rot. This disease occurs at the base of the stem. In the early stage, the lesions are brown spots with a water-soaked appearance. The lesions extend lengthwise into stripe-like patches. The edges are dark brown and the interior is grayish brown. In the later stage, the lesion tissue rots and splits lengthwise, and black granular bodies appear. This disease occurs year-round during the greenhouse maintenance period, and is especially severe in early spring. When maintained outdoors, it also occurs in August-September. High temperature and humid conditions favor
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What are the control methods for southern blight in jasmine?
Jasmine southern blight is the most serious disease of jasmine. When the disease is severe, it causes the plants to wither and die, greatly affecting yield. [Distribution] Suzhou, Hangzhou, Shanghai, Nanjing, Fuzhou, Taiwan, China. [Symptoms] The disease occurs at the root crown and roots, and under suitable conditions can spread to the lower leaves. The root crown area turns brown and rots, gradually spreading and expanding, producing a white silky film, mostly radiating outward, especially noticeable at the edges. The silky mycelium can spread to the soil near the root crown, and in severe cases the entire pot of soil is filled with white mycelium, which
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Causes and Control Methods of Silkworm White Muscardine
Silkworm white muscardine is caused by Beauveria bassiana entering the silkworm body through the skin. The route of infection is contact transmission. After the silkworm dies, the body is first soft and then hard, covered entirely with white conidia, and is called a "white muscardine silkworm." Beauveria bassiana prefers moisture and fears dryness; in humid places and rainy seasons, silkworms are very prone to the disease. If disinfection and disease prevention work is neglected during the silkworm rearing period, it will cause a major outbreak of white muscardine. Causes of silkworm white muscardine ① The rearing rooms and rearing tools for cooperative rearing of young silkworms were not thoroughly disinfected according to the prescribed standards, and the residual amount of Beauveria bassiana was high.
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Control Methods and Technical Key Points for Silkworm Pesticide Poisoning
After silkworms suffer pesticide poisoning, they generally show symptoms such as restless crawling, swelling of the thoracic region, rearing up, vomiting fluid, trembling, and shortening of the body. After poisoning by organophosphorus pesticides (trichlorfon, dichlorvos, etc.), the silkworm's abdominal legs twitch, the front half of the body swells and elongates, and the rear half shrinks, especially with the tail becoming shortened and smaller and tilting upward toward the back. After poisoning by organonitrogen pesticides (chlordimeform, bisultap, etc.), the main symptoms are spinning silk, crawling toward the edge of the rearing bed, and obvious refusal to eat; after crawling for some time, the thoracic region becomes transparent and the silkworm slowly dies. After death, it does not
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What are the control methods for the jujube tree tortoise wax scale?
(1) Manual removal of the pest source: during winter and in early spring in March of the following year, use a stiff-bristled brush to scrape the insects off the branches and collect and kill them. If snow or fog freezes on the branches with a thick layer of ice, you can directly strike the branches to shake off the ice, and the insects will fall with it. (2) Protect and utilize natural enemy resources: this pest has many natural enemies; a single predatory Chilocorus kuwanae can prey on thousands of these insects in its lifetime; the larvae of the long-shield golden small wasp can parasitize under the pest's abdomen and feed on the scale eggs. The larvae of the long-shield golden small wasp can parasitize under the pest's abdomen and feed on the scale eggs. (3) Chemical control:
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Control methods for damage caused by bean blister beetles on potatoes
Bean blister beetles have currently been found causing damage on plastic-mulched potatoes in Longhu District, Shizuishan City, over an area of about 30 mu, with leaves in some fields severely damaged, affecting the normal growth of potatoes. There are three species of blister beetles, namely the white-striped bean blister beetle (Epicauta gorhami Marseul), the yellow-black flower blister beetle (Mylabris cichorii Linne), and the large yellow-black flower blister beetle (Mylabris phalerata Pallas), which are widely distributed across the country. They mainly damage beans,
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Potato Disease Prevention and Control Methods and Key Technical Points
Disease is one of the important factors affecting the yield and seed quality of winter potatoes. The main diseases of winter potatoes in Yunnan Province and their prevention and control methods are introduced as follows: Virus disease prevention and control methods: select virus-resistant varieties and virus-free seed potatoes; pull out diseased plants in the field; control aphids in a timely manner. Fungal diseases: first, late blight. Prevention and control methods: select disease-resistant varieties and disease-free seed potatoes; promptly pull out central diseased plants and carry out intertillage and weeding; chemical control. Second, early blight. Prevention and control methods: select disease-resistant varieties; chemical control. Bacterial diseases: ring rot prevention and control methods: select
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Occurrence Patterns and Control Methods of Potato Blackleg in Heilongjiang Province
Blackleg occurs to varying degrees in all potato-growing areas. The plant infection rate ranges from 2%-5% in mild cases to 40%-50% in severe cases, often causing missing plants, broken rows, and seed potato rot in the field. In recent years, the damage caused by this disease in our province has shown a trend of increasing year by year, greatly reducing the quality, yield, and marketable potato rate of potatoes. To effectively prevent this disease, it is necessary to accurately identify its symptoms, clearly understand the occurrence patterns, and master integrated control techniques. 1 Symptom Identification 1.1 Disease Symptoms Blackleg can occur throughout the entire growth period, mainly affecting stems and tubers.
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Rice Major Pests and Diseases in Gejiu City: Occurrence and Control Methods
I. Rice Planthoppers 1. Damage characteristics: Rice planthoppers, also known as white gnats, are migratory pests with the characteristics of long-distance migration and outbreak damage. The common species include the smaller brown planthopper and the white-backed planthopper. They occur in all rice-growing areas of the city, mainly damaging rice, followed by wheat and corn, and also parasitize grasses such as Chinese sprangletop and other gramineous weeds. Adults and nymphs gather in clusters at the base of rice clumps and on leaves to suck sap. The damaged parts show elongated brown spots, and in severe cases the lower stems turn black and the entire plant dies.
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Prevention and Control Methods and Technical Key Points for Goose Influenza
This disease is a widespread acute, respiratory and septicemic infectious disease, occurring mainly in winter and spring. Goslings weighing around 500 g are most susceptible (adult geese are less commonly affected), and in severe cases the morbidity and mortality rates reach 80-90%. Sudden climate changes, excessive temperature differences in the goose house, long-distance transport and poor feeding management can all lead to the occurrence of this disease. The disease is transmitted mainly through the respiratory tract, and contaminated feed and drinking water can also spread it. 1. Symptoms The main feature of sick geese is difficulty breathing, with large amounts of serous discharge flowing from the nostrils
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