In the management of orchards, some fruit growers do not pay attention to the pruning of fruit trees during growth, letting the tree grow. As a result, the angle between the main branch and the center is too small. In winter, the multi-channel sawing method is adopted behind the main branch that stands tall and prosperous. It is very unscientific to open the angle.

In winter, the tree is in a dormant state, and its life activities are extremely slow. The slicing mouth is difficult to heal, which leads to necrosis of the bark between slashes, induces rot disease, and directly affects the growth of fruit trees. According to experiments, with the increase in the number of saw cuts, the bark necrosis rate and the infection rate of rot disease on the same main branch increased significantly. The kerf spacing was 8 cm, and the smaller the distance, the bark was necrotic. Rate and rot disease infection rate is higher. To this end, to remind farmers in the use of saw injury to open the main branch angle, the best in the growing season of May and June, saw injury is generally appropriate to two, its depth should be more than half of the main branch, saw the gap to maintain More than 8 cm, and use a wooden stick to support the opening angle in time to be fixed, in order to facilitate close healing of the wound. In addition, after the open angle of the saw injury is fixed, in order to prevent the infection of rot bacteria, it is also necessary to apply medicaments such as Nongkang 120 or Xiduxiao to protect the wound.

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