Why does the magnolia rot?

Improper maintenance and management of Cymbidium often lead to rotten roots and leaves, mainly due to poor ventilation or too wet basin soil. Secondly, if the plant suffers from white silk disease, it will cause black-brown wet rot at the base, and it will also rot if it is not prevented in time:

The most suitable temperature for the growth of Cymbidium is 15 ℃-25 ℃, more than 30 ℃, the growth is inhibited, if the ventilation is poor, the leaves will be yellowed. Therefore, when the pot plants are put outside for maintenance in late April, it is necessary to create a cool and ventilated environment. Bamboo can be used to build a frame, covered with Reed curtain as a shade to prevent direct sunlight. In the hot summer, we should do a good job of shading. Even if you put it indoors, it should be ventilated and cool.

The magnolia basin soil should always be kept moist, but do not be too wet. If you put it outside for maintenance, you should move indoors in time in the rainy season, or block Rain Water with plastic film to prevent waterlogging and rotting roots.

When changing the basin or going up the basin in spring, the basin soil should be disinfected in the sun, so as to reduce or avoid the harm of white silk pathogen. The mycelium and sclerotia can survive in the soil or plant residues for many years, and the pathogen can spread in the soil. It is easy to occur when the temperature is high and rainy in spring and summer. Infect and rot the base of the plant. If you find silk disease, you should change the culture soil in time, pull out the rotten plant, cut off the rotten root, soak it in 500 times potassium permanganate solution and disinfect it for several hours, put it in a cool place, blow-dry the wound, and then cut it into the sterilized plain sand. Put it in a cool place to re-root. If you can spray 50% carbendazim wettable powder 500 times before the onset of the disease, you can also achieve a better control effect.

White silk disease often harms orchids and irises in succulent plants.