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The insects of the scale insect scale insects are surrounded by a layer of horny shells and sprayed directly with drugs, which is not easy to work. It sucks the sap of the plant like a blood-sucking scorpion, thus causing great harm to the flowers and trees. The damaged plant not only has poor growth, but also appears yellowing of the leaves and early defoliation. In severe cases, the plants wither and die. The harmed flowers are Milan, jasmine, camellia, and smiling. Control methods: (1) Liquor to water, the ratio is 1:2. Scale insects begin their activity at 7°C in spring. It can be poured once in April, and then poured every other month or so, and it will be effective 4 times in a row. (2) Use 50 ml of vinegar, soak the small cotton balls in vinegar and rub them gently with the wet cotton balls on the damaged flower stems and leaves to kill the scale insects. This method is convenient and safe. It can not only achieve the purpose of removing insects, but also allow the damaged leaves to return to green light. (3) Wipe the affected strain gently with alcohol, and it can. Remove scale insects and remove them very cleanly and thoroughly. When rubbing orchid leaves with alcohol, not only can the scale insects be removed, but even larvae that cannot be clearly seen by the naked eye can be completely killed. The scale insects are rarely found in the second year.