What happened to the dead leaves of wintersweet?

Insufficient light, frequent watering, diseases and insect pests will cause the leaves of Chimonanthus praecox to wither.

1, insufficient light

Wintersweet likes plenty of sunshine. Only enough sunshine can ensure that its leaves are green and shiny. When there is no sunlight, the photosynthesis of leaves will be weakened, resulting in slow metabolism and coking of leaves.

Treatment: Don't leave wintersweet in a dark place for a long time. If it is cultivated in the open air, it should be moved to a sunny place. If potted plants are indoors, they should be moved to a bright place or supplemented with scattered light.

2. Too little fertilization

Insufficient fertilization includes two aspects, one is insufficient fertilization, and the other is too long fertilization interval, which leads to insufficient nutrition of flowers and burning of leaves.

Treatment: Fertilize in time, but be careful not to fertilize too much. Generally, apply fertilizer once every 5 to 20 days/kloc-0. When applying fertilizer at ordinary times, we should adopt "thin fertilizer and diligent application".

Step 3 water too much

Chimonanthus praecox has the characteristics of drought tolerance and waterlogging tolerance, which shows that Chimonanthus praecox is very afraid of waterlogging. If you water it too often and water it too much every time, its roots will rot and it will not absorb nutrients, so some leaves will become smaller and wither.

Treatment: Be careful not to water too often, and don't water too much at a time. If it is rainy, pay attention to drainage to avoid rainwater accumulation in the basin, resulting in water accumulation in the basin.

Description and detailed information of Chimonanthus praecox cultivation:

1, water

It is best to water the soil at ordinary times, keep it semi-moist, and pay attention to drainage in rainy season to prevent soil water accumulation. Replenish water in time in dry season, keep the soil moderately dry in flowering period, and it is not advisable to water it too much. Potted wintersweet in spring and autumn, the pot soil is not watered; In summer, water is poured once every morning and evening, and the amount of water is controlled according to the wet and dry conditions of the basin soil.

Step 2 apply fertilizer

Apply fully decomposed organic fertilizer once a year after flowering; After the new leaves germinate in spring to the growing season in June, the decomposed cake fertilizer is applied once every 10- 15 days; July-August is the flower bud differentiation period.

Top-dressing the mixed solution of decomposed organic fertilizer and phosphorus and potassium fertilizer; Apply organic fertilizer after autumn. After each fertilization, water the soil in time to keep the soil loose, and do not fertilize at flowering stage.

Potted Chimonanthus praecox should not be applied with water in the early stage of pot application, and foliar fertilizer should be applied in spring, and the pot should be turned over and changed every 2-3 years. After flowering in spring, the pot soil of 1/3 should be changed at the same time.

3, pest control

1) control of anthracnose

Thoroughly remove diseased leaves and destroy them centrally to reduce the source of infection; Spray 50% thiophanate methyl 800- 1000 times or 50% carbendazim wettable powder 1000 times.

2) control black spot disease

Remove diseased leaves and destroy them centrally to reduce the source of infection; Spray 50% carbendazim wettable powder 1000 times solution, or 65% zineb 500 times solution, or 0.3 Baume lime-sulfur mixture.

3) Control aphids and cut off branches with eggs.

Centralized destruction; Spraying 10% imidacloprid WP 6000 times, or 70% imidacloprid WP 1500-2000 times, or 50% marathon EC 1000- 1500 times.

Baidu encyclopedia-Chimonanthus praecox