With the onset of the winter, most flower pests enter the overwintering (or dormant) state in various ways. During this period, various pests are basically inactive and their mobility is small, which is a good season for prevention and control. Winter prevention and control is also one of the key links in flower pest prevention and control. Practice has proved that the effect of winter prevention and control is directly related to the occurrence of pests and diseases in the following year. If the measures for winter prevention and control are effective, the occurrence of the diseases and pests in the coming year can be greatly reduced, and the degree of harm can be greatly reduced. First, the pathogens (bacteria) or overwintering eggs of most flower pests and diseases in the garden are overwintering in the litters or weeds in the garden, and will be released when conditions are favorable in the coming year. Therefore, the removal and destruction of litter and weeds in the garden in the winter to improve the health conditions can greatly reduce various pests and diseases. This has a significant effect on the control of rose, rose, chrysanthemum, peony, sea lice and alfalfa, willow and other flowers anthrax, powdery mildew, rust, red spider, Russian class. 2. It is one of the important links in the management of gardens to cut off the winter pruning with the leaves and leaves of pests and diseases. With winter pruning, emphasis is placed on removing the leaves with pests. Such as yellow thorns, roses and other flowers on the eggs; cockroaches, willows, poplars and flowering shrubs on scales. The branches and leaves of the cut off pests should be cleared in time and transported out of the garden for centralized treatment. Third, winter plowing deep plowing winter plowing can make the underground pests lurking in the soil such as wax and ground tiger. The larvae, cockroaches, and eggs of crickets, worms, and other larvae are mechanically damaged. After exposure to the surface, they can be eaten by birds and other natural enemies. If necessary, they can also be hunted manually. In addition, deep turning can be used to bury the pathogens in the surface soil of the Shrike soil deep in the deep soil. The pathogens in the deep soil layer are turned to the ground, destroying the pest's suitable habitat and effectively controlling the occurrence of pests and diseases. Fourth, white coating protection Branch white coating can not only effectively prevent the freezing of winter flowers and trees, sunburn, improve the disease resistance of flowers and trees, but also damage the wintering places of pests, play both the role of antifreeze and insecticide. In particular, they are particularly useful for wintering barks and mites in the bark. The commonly used whitening agent formula is: 5 kg lime, 0.2 kg of lime sulfur stock solution, 0.3 kg salt, lard (also with other animal and vegetable oils) 0.2 kg, and water 17 kg. Preparation method: Lime and salt are first opened with water, and then lard and stone flow mixture are added to the mixture. Special attention: lime must be fully dissolved, or painted on the branches and flowers easily cause burns. V. Drug control Since various pests and diseases in winter are in dormant state, measures can be taken to prevent and treat diseases and pests that are not easily controlled during the winter season. For example, the oil emulsion with 50-100 times liquid can be sprayed to control the scale insects, and the 800 times liquid omethoate oxidized by 4 kg per square meter can prevent and cure chrysanthemum moss mosquitoes. Spraying 1% of Bordeaux mixture 2-3 times in late winter can play a good role in prevention and control of pear rust, rose black spot and other diseases.
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