1、 Excessive watering

1. Cause: excessive watering will produce ponding, and the root system is easy to rot in the water for a long time. The root system is damaged, which will lead to the yellowing and falling off of the leaves of the plant

2. Treatment method: stop watering immediately, take out the plants from the flooded soil, and re select the soil with transparent soil and good drainage for cultivation

2、 Insufficient fertilization

1. Reason: if the fertilizer is not enough, the concentration is too low or the interval between two fertilization is too long, the young stems and leaves will turn yellow first, and in serious cases, the whole plant can even die

2. Treatment method: chemical fertilizer should be added timely and reasonably, but when adding fertilizer, remember not to add too much fertilizer at one time, so as to avoid the consequences of root burning

3、 Disease cause

1. The former is mainly caused by the leaf blight of golden stripe and silver leaf, and the former is mainly caused by the leaf blight of golden stripe and silver leaf; The latter will make the leaves appear small yellow spots, and finally turn yellow and fall

2. Treatment method: take decisive measures to strengthen the water and fertilizer management of plants, increase resistance, wash the diseased plants and use fungicides