(1) cause: if the plant is in a place with very high temperature, high humidity and poor ventilation for a long time, for example, it is in a shed for a long time, then it is likely to suffer insect damage. Pests are mainly concentrated on the leaves of plants, which will turn yellow in the long run.
(2) prevention and control methods: first, if there are fewer insects, you can use a wet cloth to wipe them off, or use transparent adhesive tape to stick them off; if there are more insects, you need to spray some drugs, such as 25% chlorpyrifos powder. In addition, it is also very important to control the surrounding environment, such as strengthening ventilation; receiving as much light as possible.
(1) reason: we all know that plants depend on light to produce chlorophyll. If the light is weak for a long time, the leaves are likely to turn yellow. In the long run, there will be more and more yellow leaves
(2) solution: try to put it in the place where it can shine the astigmatism, not too dark for a long time; in addition, avoid the strong light.
(1) cause: This is also an important cause of yellow leaves. Especially in summer, the temperature is very high, if the ventilation is not strengthened, the leaves will turn yellow easily.
(2) measures: in view of this situation, of course, we should strengthen ventilation. Bring fresh air to the plant, it can be more healthy.
(1) cause: sometimes, yellowing is a kind of aging of leaves, which is normal, so don't worry
(2) measure: if this is the case, cut off the leaves.
