1. Leaf spot disease: at the beginning, there are many small brown spots on the leaves, which gradually expand with the deterioration, leading to the dry edge of the leaves, leading to the yellow leaves. At the later stage, when it is serious, the whole plant will dry up and die, which is a common disease.
2. Blight: this disease will cause many branches to dry up, thus water shortage and loss of growth vitality, seriously affecting the later growth.
1. Aphid: after the flower withers, the temperature will rise, which is the time when the aphid occurs frequently. After infected with aphids, they will crawl all over the branches and stems, resulting in the lack of water in the branches, which seriously affects its growth.
2. Coir moth: the larvae that are not hatched will lie on the leaves of the plant and suck, and they are all living together in groups, so the harm is great, and the branches and stems will become bare.
1. Disease: when pruning in winter, the diseased branches and leaves need to be cut and destroyed in a centralized way. After the disease occurs, comprehensive spraying is required to achieve the purpose of removing the disease.
2. Insect damage: if the number is small, consider artificial methods first. If the quantity is difficult to control, spray with 1000 times solution of 50% phoxim emulsifiable concentrate.
