How to maintain potted camellia? What pests and diseases need to be prevented? Pruning and shaping pruning can be divided into thinning and dwarfing. Drainage refers to the drainage of dead branches, diseased branches, dense branches, cross branches, overlapping branches and parallel branches. When the branches inside the plant are too dense, start from the roots. During dilution, the incision should be flush with the bottom of the branch to accelerate wound healing. Dwarfing is to limit the endless growth of branches, promote the germination of axillary buds under cutting, increase the growth of lateral branches and make the plant shape fuller. When pruning, we should pay attention to ensuring the balance between the main branches, so that the stems, branches and leaves can get room for growth. When pruning, pay attention to the lateral buds of branches outward, and the trimmed plants will be more compact; Qin Ying is good at pruning the disorderly growing camellia varieties, and it is not advisable to prune too much at one time.

Pruning is to remove the terminal buds or shoots of branches, and pruning is to cut off the aging branches. After removing the growing point of the main branch, the continuous growth of the plant can be restricted, and the axillary bud can be stimulated to germinate more side branches. After removing the lateral branches, more secondary lateral branches can be formed, which doubles the number of flowering parts, which is beneficial to adjust the overall growth trend of plants and dwarf trees. After several years of pruning and shaping, the branches, stems and leaves of camellia are more reasonable, the plant shape is beautiful, the flowers are neat, and the flowers are large and gorgeous, which improves the overall ornamental value of camellia.

Bud smearing and thinning is to remove the axillary buds from the tender branches of camellia, and keep the single buds that are beneficial to the growth of trees, and concentrate on the germination and differentiation of its lateral branches into flower buds, buds and flowers. The purpose of flower thinning is to ensure the quality of flowering and reduce the number of whole flower buds. Usually, only one main bud is left on a branch, and the other side bud is removed. For buds and buds on inner branches and centripetal branches, we should also remove them to avoid distracting nutrition and make the buds full and colorful.

Insect control

Anthracnose mainly harms long leaves and old leaves. The lesion is an irregular round or waterlogged brown wheel spot with a radius of 5 ~ 15 mm, and the diseased leaves turn yellow, dry and easy to fall off. Generally speaking, this disease occurs from May to July. If found, the diseased branches and leaves should be cut off and burned in time. Pay attention to loosening soil, weeding and pruning, keep ventilation and light transmission, and reduce environmental humidity. Infected plants can be sprayed with 70% thiophanate methyl solution 800 ~ 1000 times or 75% chlorothalonil solution 600 ~ 800 times. Spray once every 7 days, and it can be sprayed 4 ~ 5 times continuously. Removing old leaves and diseased leaves before spraying can improve the control effect.

The primary needles on the brown spot leaves are light green or reddish brown in size, and gradually expand into round or irregular large spots. The leaves are dark on the front and light on the back. There are gray-black mildew spots on the wet surface, with reddish-brown edges and slight uplift. In humid environment, brown granular spores can be extruded from mildew spots, and diseased tissues can tear leaves or fall off in the form of perforations. When diseased leaves and branches are found, they should be removed in time and burned centrally. In hot summer, pay attention to keep ventilation and light transmission.