"Peace Tree" is actually an elegant name for Cinnamomum cassia of Lauraceae. Because its body (roots, stems, leaves) is rich in cinnamon oil. Cinnamon oil (mainly composed of cinnamaldehyde) can drive away indoor dirty gas, correct odor, drive away plague and evil spirits, drive away insects and flies, kill germs and purify the air.
When a tree is injured, it secretes mucus to protect itself. Mucus is cinnamon oil from trees. It is more likely that there is an insect pest, and aphids are easy to stick and suck on the tender leaves and buds of the safe tree, resulting in greasy leaves, which in turn induces sooty blotch and affects the growth and display of plants.
Pest control 1. Disease ① Anthracnose: It mainly harms seedling stage and leaves. Leaf diseases mostly occur on leaf surface, leaf tip and leaf edge, which are brown and irregular in shape. Later, it often expands or merges into large grayish brown spots with brown wavy edges, and there are many small black spots on the diseased spots, which are umbilical. Conidia spread by wind and rain. When the humidity is high, conidia germinate and invade leaves or seedlings, causing harm. Continuous rain, insufficient sunshine, sticky soil or humidity are easy to get sick when staying in the shed, and it is the most abundant in February-April. Prevention and control methods: if a small number of diseased leaves are found, they should be removed and destroyed in time; Increase the application amount of phosphorus and potassium fertilizer in the growing season to improve plant resistance; At the initial stage of the disease, 500 times of 25% carbofuran wettable powder, 700 times of 60% carbofuran wettable powder or 600 times of 75% thiophanate-methyl wettable powder were sprayed alternately every 18 days to15 days for 3 ~ 4 times continuously.
② Brown spot disease: It occurred on the new leaves of plants from April to May, and began to appear oval yellow-brown spots on the leaves, and then continued to expand, with more small black spots in the front of the leaves and purple spots at the back, which made the whole leaves yellow and withered, causing a large number of leaves to fall off. Prevention method: 1% bordeaux solution can be used for prevention; A small number of diseased leaves appear, and they are removed and burned in time; At the initial stage of the disease, 500-fold solution of 50% carbendazim wettable powder, 65,438+0,000-fold solution of 50% benomyl wettable powder or 65,438+0,000-fold solution of 50% bactericidal aqua regia were sprayed alternately every 65,438+00 days for 3-4 consecutive times.
③ Brown root disease: the diseased leaves gradually turn yellow and droop, when it is serious, it turns brown and dry, the stems lose water and shrink, the roots turn brown and rot, and the diseased plants die in a short time. The root of the disease, diseased soil and diseased plants are the primary sources of infection of the disease, which are spread by wind, rain or contact and usually occur alone. Prevention and control methods: seriously ill plants and dead plants should be uprooted and burned, and disinfected with 600 times of 50% carbendazim wettable powder; Spraying 50% thiophanate-methyl at the beginning of the disease? 800 times of sulfur suspending agent or 800 times of 50% Genfuling wettable powder.
2. Pests ① leaf roller moth: it mostly occurs in summer and autumn. It rolls a few new leaves into a nest, and larvae lurk in it to feed on the leaves. Can spray 800 times of 90% trichlorfon crystals or 1000 times of 40% dimethoate EC.
② Aphids: Young leaves and buds of Cinnamomum cassia. Lan Yu is vulnerable to aphids, which leads to greasy leaves, and then induces sooty blotch, which affects the growth and display of plants. Control method: after sprinkling plant ash on plants, rinse them with clear water; Spraying neem leaf juice can effectively kill insects; Spraying 10% imidacloprid wettable powder 2000 times.
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