First, choose disease-free and disease-resistant varieties. The selection of flowers free of pests and diseases is an important part of the prevention and control of pests and diseases. It is forbidden to bring flowers with pests and diseases into the home for planting so as not to affect the growth of the original flowers. Flowers have been bred into varieties with stronger resistance to diseases (such as varieties of aster resistant to blight), and selection of disease-resistant varieties is the most economical and most effective method for controlling pests and diseases. Second, deep turning, changing soil, soil. Home-grown flowers, deep-turning can turn larvae, maggots, eggs, etc. lurking in the pot soil to the ground, and are affected by other natural factors such as light, temperature, and humidity, and increase the mortality rate, and can also be artificial. Kill. The soil can bury the bacteria and leaves in the shallow soil in the deep soil layer, which can cause them to lose their vitality and increase soil nutrients. Changing the soil can remove the diseased soil from the pots, improve the soil fertility, and help the flowers grow robustly. Third, a reasonable amount of watering fertilizer. Rational fertilization refers to the appropriate ratio of nitrogen, phosphorus, and potassium to prevent excessive application of nitrogen, which causes the leaves to grow long and susceptible to pests and diseases. At the same time, it is necessary to pay attention to the application of fully decomposed human waste water and organic fertilizer. Watering should be timely and appropriate, too much, so that flowerpot soil in anoxic state, easy to rot, root development blocked; too little, affecting flower growth, easy yellow leaves, withered. Fourth, timely weeding, trimming period. Weeds not only compete with flowers for nutrients, affecting ventilation and ventilation, obstructing growth, and affecting the viewing. They are also sites for breeding of germs and pests. Weeding in time to create suitable environmental conditions to reduce the occurrence of non-invasive diseases. The flowers and trees are trimmed, and the diseased branches, dead branches, and residual branches are cut off, and the eggs, larvae and adults on the branches are eliminated, and the weeds, diseased branches and damaged plants removed in time are destroyed in a centralized manner so as to prevent secondary infection and reduce the number of pathogenic bacteria and pests. Fifth, physical control, chemical defense combination. Use one kind of tropism (such as phototaxis), suspended animation or other characteristics of pests to carry out artificial trapping and killing to eliminate pests and diseases. For infected flower plants, due to the limitations of family conditions, the risk of poisoning and the problem of polluting the environment, the timing should be grasped, the right medicine should be prescribed, and the appropriate amount should be sprayed to prevent injury and plant allergies. It is also possible to use plant pesticides that are less polluting on the environment. If soaked with cigarettes for 10 days in clean water for a day and night, filter the cigarette residue, add 10 - 15 times more water and a small amount of neutral detergent before spraying, spray immediately after mixing, and control the thrips, leaf curl, potential Leafhoppers and other pests. China Agricultural Network Editor
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