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 it is a good season for prevention and control. If effective control measures are taken, the incidence and harm of pests and diseases in the coming year can be greatly reduced, and the effect of doing more with less can be achieved.
The pathogens (bacteria) or overwintering eggs of most flower pests in the garden are overwintering in the litters or weeds in the garden, and will come out 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, moth.
Cutting off the winter pruning of branches and leaves with pests and diseases is one of the important links in the garden management work. In conjunction with winter pruning, the branches and branches with pests and diseases are mainly cut off, and the branches and leaves of the cut off pests are promptly cleaned up and transported out of the garden for centralized treatment.
Winter plowing, deep plowing, winter plowing and deep plowing can damage the larvae, earthworms, eggs, etc. of subterranean pests such as earthworms, earthworms, cockroaches, and golden needles that are lurking in the soil. After being exposed to the surface, they can be preyed by birds and other natural enemies. Foraging, if necessary, manual killing. In addition, deep tumbling soils buried pathogens in deep soil, pathogens in deep soil were turned to the ground, destroyed the pest's habitat, and effectively control the occurrence of pests.
The application of white coating to protect white stems can not only effectively prevent the freezing damage and sunburn of winter flowers and trees, improve the disease-resistant ability of flowers and trees, but also destroy the overwintering sites of pests and insects, and play a dual role of preventing freezing and killing insects. It is especially good for wintering barks and crickets. 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: first open the lime and salt with water, then add the lard and lime sulfur stock solution and stir it evenly. Special attention: quicklime must be fully dissolved, otherwise it will cause burns when applied to flowers and trees.
Drug prevention and control Because winter pests and dormant species are mostly in dormant conditions, winter medicines can be used to prevent and treat diseases and pests that are not easily controlled during the season. Such as 50-100 times the oil emulsion spray can control scale insects, with 800 times the liquid omethoate oxidized 4 kg per square meter can prevent and control chrysanthemum mosquitoes. Spraying 1% of Bordeaux mixture for 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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