Pruning of orchid leaves

1: if there are diseases in leaves that are uncontrolled and difficult to control, and are highly contagious, they should be cut off immediately. 2: the orchid strain infected by the virus should be completely destroyed or isolated for observation. 3: do not cut the leaves of insect pests, mainly disinfestation. 4: if leaf diseases and insect pests have been controlled or normal aging, do not affect the beauty, immediately cut off, can wait until it is completely yellowed. According to plant physiology: (1). Before the leaves of herbaceous plants are yellowed and fall off, the nutrients in the aged leaves will be transferred to the newest growing point, namely the new bud (grass). Orchids are herbs and obey this law. The yellowing of orchid leaves is a complex physiological process, including the transfer of nutrients to new buds (grass). Cutting off the leaves that have not been completely yellowed will undoubtedly lose their nutrients. (2)。 As long as the leaves still contain chlorophyll, they can carry out photosynthesis and produce nutrients. The above situation is more important for the old and weak seedlings. According to my observation and experiment, if the old and weak seedlings can wait until the old leaves or the leaves that have suffered from diseases and insect pests are yellowed and then cut off, the new buds will generally be unearthed early and the new grass will be relatively strong. In fact, if the cultivation of old cucurbit head can retain a few residual leaves, after the emergence of new buds, the residual leaves may be yellowed, but the new buds will be stronger also for the above reasons. It has little effect on multi-seedling and strong grass, and it can be pruned reasonably.