In winter, the bonsai pests of various stumps are not eaten, and they are concentrated. Therefore, this season is a great opportunity for the stumps and bonsai pests to prevent diseases. Clear the Bonsai Garden. After the winter, the dead branches, fallen leaves, weeds and rotten fruit were completely removed, and the overwintering parasites on the bonsai branches of the tree stump were scraped, and the overwintering parasites on the branches of the stumps were scraped off in time to burn them in a concentrated manner. To eliminate overwintering pests. White pest removal. After cleaning the bonsai garden in winter, use 10 parts of water, 3 parts of lime, 0.5 parts of lime sulfur solution, 0.5 parts of salt and grease to mix and brush on the trunk, branch and stump of stump bonsai to kill tree stumps and branches. On wintering pests. Guandong extermination. Locust holes were found on the stumps and branches. A 160-fold Bordeaux mixture was injected with a syringe and then closed with lime slurry to effectively eliminate insects in the cave. Pruning prevention. Combine the winter pruning of stump bonsai, cut off the dead branches, dead fruits, dead buds, and hanging ropes on the tree, etc., and trim the tree thoroughly (pay attention to maintaining a beautiful shape). Clean up, and pile up and burn away all kinds of cleaned-up diseases. In addition, the fruit branch and branch composition of the old-fashioned fruit and bonsai is also a potential place for overwintering pests. It should be pruned and prevented in time, and it should be updated and rejuvenated while maintaining the beautiful bonsai posture. Landfill application. In winter, sprinkle the soil (50% phoxim 500g, mix fine soil 50kg) evenly in the potted bonsai pots, then pour the potted soil, turn the soil into the soil, and poison it in winter. Pests.