What if the orchid leaf tip dries up?

The reason why the leaf tips of orchids are dry:

① anthracnose, white silk disease and round spot can be sprayed with 50 {bf} carbendazim or 50 {bf} carbendazim, once every 10 days, 3-4 times in succession. Shell insects should be eliminated in time, and can also be controlled with insecticide solution. ② should place orchids indoors in a ventilated and sunny place for maintenance in winter, so that they can not see the sun in summer, dry soil in autumn and wet in winter.

③ leaves yellow is lack of fertilizer, should be topdressing; black leaves and leaf tip scorched is too much fertilizer, should stop fertilization; each clump of leaves is not many, or the root is not good, should pick flowers.

④ cut off the dry leaf tip and the leaves damaged by diseases and insect pests in time.