Methods to prevent diseases and insect pests of flowers, and how to prevent yellow leaves after flowers enter the room

First, after controlling the watering flowerpot into the room, the water transpiration on the surface of the flowerpot and the value plant is reduced because the space is not as open as the outdoor space. If it is still watered as before, the rotten roots will be caused by the wet basin soil and the leaves will turn yellow.

Second, reduce fertilization after flowers enter the house, the rise in temperature will make them enter the stage of rapid growth. However, the amount of fertilizer absorbed by them is not as good as that in summer, so they should reduce or stop topdressing to prevent the plant from yellow leaves.

Third, adjust the illumination of some flowers that like strong light, such as rose and Fusang, if they are placed in a shady place after entering the room, the plants will often have yellow leaves. On the contrary, putting the bird's nest fern and tortoise back bamboo in the strong light will also cause the leaves to lose green and yellowing. The location of flowers in the room should also be adjusted reasonably.

Fourth, the environment ventilation environment is closed, and the content of ethylene in the air increases gradually. at this time, many flowers that are more sensitive to ethylene will have yellow leaves because of aging. Therefore, keeping good ventilation is one of the effective measures to prevent the yellow leaves of indoor flowers.

Keep the right temperature due to environmental temperature discomfort, many flowers will also have yellow leaves, especially in the case of large temperature difference before and after the flowers enter the room. If the lowest outdoor temperature is 5 ℃, move Milan and rhododendron to the greenhouse, due to inattention to cooling, when the ambient temperature rises to 25 ℃ during the day, the plant will soon appear yellow leaves, this situation also needs to be prevented. Source: Lanzhou Agricultural Information Network)