One is because the flooded leaves are distorted. Because of too much watering or too much rain, the roots can't breathe well and even rot. The symptoms are: the old leaves change little or the color becomes darker, the young leaves turn pale yellow, and the leaves are deformed and twisted. In this case, if the symptoms are mild, you can loosen the soil and open ditches to control watering.
Second, because of the drought. It is characterized by the gradual development of old leaves into new leaves. This situation is generally caused by dry weather, soil surface runoff can not preserve rainwater and other reasons.
Third, it is caused by excessive fertilization or high concentration. It is characterized by the gradual yellowing of old leaves, the deformation and distortion of leaves, and the thick and shiny new leaves.
Fourth, because of the lack of fat. This includes two aspects: first, insufficient fertilization leads to soil hardening. It can be overcome by turning over the soil in time and applying special microbial agents. Secondly, due to insufficient light, enhanced light can be used.
The water in the north is alkaline, which easily distorts the leaves.
Six, plant toxicity caused by leaf deformation and distortion. After some plants are infected with pests and diseases, the concentration of sprayed liquid medicine is too high, which causes the deformation and distortion of plant leaves.