Many fruit growers do not attach importance to the pruning of fruit trees during growth, letting the tree grow. As a result, the angle between the main branch and the center stem is too small, and in winter, the angle is opened by using multiple sawing methods behind the standing main branch. It is very unscientific and even very harmful.
Because the winter tree is in a dormant state, the life activity is extremely slow, and the slicing mouth is difficult to heal. As a result, the bark between the slashes is necrotic and induces rot disease, directly affecting fruit tree production.
According to the relevant data, with the increase in the number of saw cuts, the bark necrosis rate and the infection rate of rot disease in the same main branch increased significantly with sawing, and the cut-off distance was 8 cm as the critical value, the smaller the spacing, the Skin necrosis rate and rot infection rate are higher. To this end, to remind farmers in the use of saw injury to open the main branch angle, should pay attention to the growing season from May to June, saw injury is generally appropriate to two, the depth should be more than half of the main branch, kerf spacing Keep it above 6-8 cm and fix it with a wooden stick to support the open angle in time to facilitate close healing of the wound. In addition, after the open angle of the saw is fixed, in order to prevent the infection of the rot bacteria, the production should also be applied to protect the wound with agents such as Nongkang 120 or bactericide.
Food Ingredients,Calcium Pantothenate,Cas 134-03-2
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