There are many kinds of flowers, and the types of diseases and insects occurring and their length and length are different. According to a recent survey, the main species of flowers and insect pests in our city are: leaf spot, melasma, anthrax, blight, powdery mildew, scale insects, aphids, thrips, longhorned beetles, wood moths, whiteflies, spotting Flies, maggots (Red spiders, crickets), nematodes, etc. Leaf spot disease mainly harms camellia, sweet-scented osmanthus, eucalyptus, orchids, pineapple, Podocarpus, San Weikui, etc. Generally, the diseased leaf rate is 15-30%, and the weight is more than 50%. Black rose, rose, chrysanthemum and other flowers are more common victims, the general damage rate of 20-40%.
Anthracnose The disease caused by many species of flowers, causing heavy damage, the common victim of flowers are: orchids, evergreen, camellia, Milan, olivia, rubber tree, white orchid, clivia, bamboo worms, palmaceae flowers. The damage rate of flower leaves is 10-30%, and serious 90%. In addition, powdery mildew infested crape myrtle, peony, etc., wilt disease damage Palmaceae (seedling stage) flowers, chrysanthemums and so on.
The insect is the most common insect pest. Often injures cycads, streaks, white osmanthus, sweet-scented osmanthus, camellia, smiling, jasmine, eucalyptus, eucalyptus, Fujian tea, brown bamboo and so on. In the environment where the planting density is high and the shade is high, it is heavy and the control is not timely, often causing defoliation, dead branches and even plant death.
Aphids (Red spiders, crickets) There are many kinds of locust-like flowers, common are citrus, eucalyptus, marigold, rose, rose, cycad, bamboo and so on. Autumn is the peak season for fleas and must be used to prevent and treat pesticides in time. Secondly, the hummer often infests the leafhoppers, etc. The hornbills and the wood maggots are damaged by the rough branches of the eucalyptus, imitation umbrella, cycad, etc. after transplanting, and the general damage rate is 10-40%; The locusts and spotted larvae mainly damage chrysanthemums, peony, and Rhododendron species; nematodes occur more commonly and are less likely to be found. The main targets are: how to imitate umbrella maple, etc., of evergreen, palm family, chrysanthemum, and even tall trees. Causes the roots and stems of flowers and trees to rot. Nematodes also often harmed with Fusarium, causing severe blight transmission.
Prevention comments: Prevention and control of flower pests and diseases should be based on prevention, to minimize the repeated infection in the garden, and it is worth noting that how to avoid the pollution of the water source leads to the epidemic of the disease. 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 and disabled leaves, use clean water sources to water the flowers, and reasonably arrange the planting layout of the flower varieties in the field so as to minimize the repeated infection and spread of pests and diseases.
2, prescribe the right medicine, timely medication control. Disease prevention and control: leaf spot, black spot disease use thiophanate, carbendazim, mancozeb, copper oxychloride and other pesticides to prevent and cure; anthrax use Shi Baogong, so that 100 grams or on behalf of Zinc, etc.; Powdery mildew Granville, plastic suspension, triadimefon and so on.
Insect pest control: The scale insects should use speed culling, omethoate dimethoate; fleas with bufalin, konjac, amitraz, etc.; pupa, white fleas control with imidacloprid, rice planthopper, etc.; spot The use of insecticidal double, Bataan, etc. for the larvae is used; Carbofuran and Milur are used for the larvae; in case of borers, in addition to spraying the pesticide on the surface, pesticides can be used for perfusion, mixed mash and other methods.
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