What causes the leaves of poplar to turn yellow? What should I do if the leaves of poplar turn yellow?

1. The yellowing of carambola leaves may be caused by diseases such as red spider and leaf blight, which will directly affect the normal growth of carambola leaves and make them yellow, scorched and dry. At this time, it is necessary to prune the seriously ill leaves, destroy them centrally, and spray diluted omethoate emulsion for treatment.

2. The waterlogging tolerance of carambola is poor. If the soil is kept wet for a long time, the leaves of carambola will turn yellow and dry. When watering the carambola trees every day, we should strictly control the amount of watering, so as not to let the roots accumulate water, and drain the accumulated water in the soil in time during the rainy season to avoid root rot caused by waterlogging.

3. There is a great demand for nutrients during the growth of carambola. If there is no fertilization for a long time, the leaves of carambola will turn yellow. Therefore, during the growth of carambola, diluted phosphorus and potassium compound fertilizer should be applied once every half month to supplement nutrition and make carambola grow healthily.

4. The yellowing of carambola leaves may also be caused by lack of light. Carambola needs a lot of light during its growth. If shaded plots are selected for planting, the leaves of carambola will not be able to synthesize chlorophyll, which will lead to yellowing. When planting carambola trees, it is suggested to choose sunny plots and give all-weather illumination.