The main types of flowers and insect pests in autumn are: leaf spot, black spot, anthracnose, blight, powdery mildew, aphid, thrips, longhorned beetle, wood-moth moth, whitefly, spotted fly, and mite (red spider,跗 line 螨), nematodes and so on. Leaf spot mainly harms eucalyptus, orchids, etc. Generally, the diseased leaf rate is 15% to 30% and the weight is more than 50%. Black spot disease mainly affects rose, rose, chrysanthemum, etc., and flower damage is more common. The hazard rate is generally 20% to 40%. Anthracnose harms a wide variety of flowers, and the common victims are orchids, rubber trees, white orchids, and clivia. The damage rate of flower leaves is 10% - 30%, and serious is more than 90%. In addition, powdery mildew damage crape myrtle, peony, etc., wilt disease damage Palmaceae flowers (seedling period), chrysanthemum and so on. There are many species of flowers that are harmful to earthworms. Commonly there are banyan, marigold, rose, rose, and cycad. Fall is the peak period of fleas and it must be used to prevent and treat pesticides in time. In addition, whitefly, aphids and Liriomyza are mainly harmful to chrysanthemums, peony and azaleas. The occurrence of nematodes is more common and difficult to find, and the target species are mainly evergreen, palmiaceae, chrysanthemum and so on. The prevention and control of flower diseases and pests should be based on prevention, and it is particularly worth noting how to avoid pollution caused by the pollution of the water source. In addition, it is necessary to prescribe the right medicine and prevent it in time. 1. In the flower field, we must promptly clean up the sick leaves and leaves, use a clean water source to water the flowers, and reasonably arrange the planting layout of the flower varieties in the field so as to reduce the repeated infection and spread of the pests and diseases. 2, prescribe the right medicine, timely medication control. Disease prevention and treatment: leaf spot, black spot can use thiophanate, carbendazim, mancozeb, copper oxychloride and other pesticides for prevention and control, anthrax use protection, so that 100 grams or on behalf of Sen Zinc and other control, powdery mildew With extermination Weiwei, rubber suspension, triadimefon and other prevention and treatment. Pest control: Scale insects should be selected for speed culling, omethoate prevention and control, fleas with carbendazim, konjac, amitraz and other control, pupa, whitefly with imidacloprid, rice planthopper, Wanling, etc. Liriomyza was used for prevention and treatment with dimehypo and badan, while nematodes were treated with carbofuran and miral. In the event of drilling pests, pesticides may be used in addition to spraying pesticides on the surface.
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