Tips for prevention and control of common diseases and insect pests in orchids
Home-grown orchids often have a variety of diseases and insect pests, light leaves long spots yellowing, affecting its growth, serious branches and leaves rot and death. Therefore, the cultivation of orchids need to master some key points and tips for the prevention and control of diseases and insect pests, which are of great help to raise orchids. Today, the editor will introduce to you several tips for preventing and controlling orchid diseases and insect pests.
1, iron to treat black spots. Orchid leaves often have black spots, that is, leaf spot disease, this disease spreads rapidly, if not timely control, it will soon spread the whole leaf or even the whole plant. Find an iron to burn red with fire, point the iron at the part of the ice spot, make it green and turn white, so that although not very beautiful, but basically save a leaf. In strong light, you can also use a magnifying glass to burn the disease spot with the focus of sunlight.
2, skillfully treat aphids and shell insects. Spray edible vinegar with water according to the ratio of 1 part of vinegar to 10 parts of water, once every 7 days, and spray 3 times in a row. This method is convenient and safe, which can not only achieve the purpose of controlling insect pests such as shell insects and aphids, but also make the damaged leaves turn green again and promote the normal growth of orchids.
3, when spraying orchid plants, an appropriate amount of carbendazim or chlorothalonil can be added to the water, which can effectively control all kinds of diseases and insect pests of orchids. The powdery brown sugar and boiled water were mixed at the ratio of 1 to 100. After cooling, the orchid plant was sprayed with brown sugar solution once every 3 days for three times, which had a good effect on the control of downy mildew, powdery mildew, black spot and leaf blight.
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