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What are the control methods for scale insects on osmanthus?
Adults and nymphs often settle on osmanthus branches, suck sap, causing branches and leaves to wither, and in severe cases the whole plant dies. They often secrete large amounts of honeydew, which leads to sooty mold. Leaves and stems become covered with a black, sticky substance, hindering photosynthesis and affecting ornamental value. The main species are the cottony cushion scale and the white peach scale. Control methods: strictly prohibit the use of seedlings carrying the pest...
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How to prevent and control Osmanthus brown spot disease? These methods you need to know
Osmanthus brown spot disease is a common disease of osmanthus, caused by infection with fungi of the subphylum Deuteromycotina. It occurs in both field-planted and potted osmanthus plants. When it strikes, mild cases affect the ornamental effect, while severe cases cause plant death. Symptoms mostly occur on leaves, mostly spreading from the leaf tip and leaf margin toward the entire leaf. In the early stage, the lesions are light...
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What are the control methods for Osmanthus brown spot disease?
Brief introduction Osmanthus brown spot disease is a very common disease; in severe cases it causes the whole plant to drop its leaves, affecting flowering and ornamental value. It has long been reported in countries such as the UK, the US and Japan. It also occurs frequently in Shanghai, Nanjing, Hangzhou, Jinan, Beijing, Fuzhou, Guilin, Xiamen, Guangzhou, Taiwan, China and other provinces and cities in China. Symptoms The pathogen mainly infects the leaves...
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How to prevent premature senescence in peanuts? Master the control methods
How to prevent premature senescence in peanuts? Please advise: to prevent premature senescence in peanuts, the following points should be followed: 1. Site selection. Choose fields with relatively high fertility, and apply sufficient base fertilizer, plow deeply 25-30 cm early, and sun the ridges. Apply 2000 kg of rotted barnyard manure or 25-35 kg of cake fertilizer, 50 kg of ternary compound fertilizer, 50 kg of phosphate fertilizer, zinc fertilizer... per mu.
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How to prevent and control peanut stem rot? A comprehensive analysis of practical methods
How to prevent and control peanut stem rot? Please explain. Peanut stem rot, commonly known as "rotten neck disease", generally occurs in the middle and late stages. After infection, the plant quickly withers and dies; in the late stage, infected plants' pods often rot or the kernels fail to fill, causing serious losses. The incidence rate in ordinary fields is 20%-30%, and in severe cases reaches 60%-70%, or even results in no harvest at all....
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Prevention and control methods for pepper seedling death caused by high summer temperatures
How to prevent and control pepper seedling death in high summer temperatures? Please explain the methods. In summer, the hot and rainy climate conditions easily trigger the occurrence of various pepper diseases. When heavy rain is followed by sudden clearing and a sharp rise in temperature, disease epidemics are easily caused, and plants can die within 3 to 5 days, known as "dead plants." This disease is a devastating disease of peppers...
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Detailed Explanation of the Occurrence and Control Methods of Ginseng Phytophthora Blight
This year the rainfall has been heavy, and the high temperature and high humidity are very suitable for the reproduction of the ginseng Phytophthora blight pathogen. The suitable temperature for the onset of ginseng Phytophthora blight is induced under soil temperatures of 10-30°C; soil temperatures of 20-26°C are most suitable for the disease to occur, while below 5°C and above 30°C the disease stops occurring. The main pathogen causing ginseng Phytophthora blight is the fungus of the genus Phytophthora in the subdivision Mastigomycotina...
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What are the control methods for ginseng white grubs?
White grubs are the larvae of large scarab beetles. They are voracious pests that can cause damage continuously. In spring, they begin activity when the soil temperature at 10 cm below the surface reaches 5°C; the optimal average soil temperature for activity is 13-18°C. Above 23°C they gradually move to deeper soil layers, and when the soil temperature drops in autumn to their suitable activity temperature, they move back up to the upper soil layers. Daily life...
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What are the control methods for ginseng click beetles?
The insect's scientific name is the click beetle, also known as wireworm, jinci rake, yellow youyan, etc., and its adult is also called the snapping beetle. It belongs to the order Coleoptera, family Elateridae. It causes the most serious damage to ginseng. It generally begins activity after the soil thaws, and the larvae mainly damage the underground root and stem parts of ginseng, generally in the layer from the ginseng root to 10 cm below the surface...
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What are the control methods for the ginseng large gray weevil?
The large gray weevil, also known as the snout beetle or "tula lv", has an adult body length of 9-12 mm, grayish-yellow or grayish-black, densely covered with grayish-white scales. The head and rostrum are densely covered with golden shiny scales. The pests occurring this year mainly feed on tender stems and leaves on the soil surface during the seedling emergence period, causing great damage. When disturbed, they feign death and drop to the ground, causing damage in the early morning and evening....
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