Plant diseases and insect pests can be caused by the conditions of high humidity, high temperature, closed air and so on. If you find a white spot on the leaf surface of the umbrella, or if the leaf shrinks and falls, you should carefully check whether there is any kind of insect. If the leaves of the cultivated parasol first turn black and then rot, it may be caused by bacteria. At this time, it is suggested that you spray some "carbendazim" and other drugs on the leaves. If you find that there are obvious small insects on the leaves of the parasol, you can choose to spray "black tornado", and the pests will get better after a period of time.
Because the origin of the umbrella is tropical, so planting this plant in winter to ensure that other growth conditions are suitable, but also to maintain the surrounding temperature can not be less than 15 degrees.
If the fertilizer is not applied properly, the phenomenon of "burning leaves" will appear, which is also the main reason for the leaves to fall. If you apply a small amount of fertilizer at a time, it is possible that the fertilizer is too close to the root of the umbrella. In winter, the quantity of water and fertilizer should be strictly controlled, and the frequency can be about once every four days. In addition, in order to avoid too dry winter, you can drench a very small amount of water on the surface of umbrella leaves.
1. Appropriate watering and fertilization. In winter and suitable growth environment, we should reduce the frequency of watering and fertilization.
2. The minimum safe temperature for planting parasol in winter is 8 ℃, so it is necessary to do a good job in cold prevention. Summer to avoid direct sunlight, the rest of the noon to do sunshade work.
