When osmanthus is short of water, the leaves will become dull, begin to fade and slowly turn yellow. When there is extreme water shortage, osmanthus leaves will start to curl in order to protect themselves from water loss and reduce water evaporation. It is necessary to replenish water in time at this time.

If the leaves of osmanthus trees curl occasionally, check whether it is because of insect pests. Osmanthus trees don't encounter many pests, just red spiders or scale insects. Starscream is relatively easy to kill and can be killed with pesticides.

If the leaves of osmanthus trees grow spots first and then curl, it may be because of diseases caused by bacteria. The common diseases of osmanthus trees are brown spot and leaf spot. These bacterial diseases cause the veins to lose water and cause the leaves to fall off. The amount of zinc and manganese can be 800 times. After spraying the leaves, the remaining solution can be irrigated, and the interval between two consecutive uses is seven days.

Extended data:

breeding method

Layering method can be divided into low pressure and high pressure. Low-pressure osmanthus fragrans must choose the mother tree with few branches or clusters, from spring to early summer, and choose the relatively strong low-dry mother tree;

Cut or girdle the lower branches of 1-2 years old, select the parts that are easy to bend and reach the xylem, then press them into a ditch 3-5 cm deep, and fix the pressed branches with wooden strips, leaving only the tips and leaves outside.

The high-pressure method is to select 1-2-year-old stout branches from the mother tree in spring, cut a circle or girdle by low-pressure method, or cut it from its lower side, the length is 6-9 cm, then smear the wound with culture medium and tie it tightly with plastic bags from top to bottom. During the cultivation process, the culture medium is always moist, and after rooting in autumn, it is cut off from the mother plant for maintenance.