Saw cuts on fruit trees are a common occurrence, affecting both large and small trees. However, many growers tend to neglect the proper care of these wounds, leading to slow healing, increased risk of rot infection, and ultimately reduced tree vigor and fruit yield. It is therefore essential to implement effective wound care practices.
First, it's important to use sharp and smooth saws when pruning. A clean, precise cut helps the tree heal more quickly and reduces the chances of damage. Blunt or rough cuts can create larger wounds that are more susceptible to disease.
Next, applying a healing agent to all cut surfaces is highly recommended. This protective layer not only prevents moisture loss but also acts as a barrier against rot-causing bacteria. Studies have shown that using a healing agent can reduce the infection rate to around 0.1%, compared to 0.1%–0.5% in untreated areas, depending on overall management practices. Trees with large wounds treated this way often heal within the same year, significantly faster than those left unattended.
Another effective method is to cover the cut with a clay mixture. By mixing sifted clay with water to form a soft, paste-like substance, you can create a protective seal over the wound. This helps prevent pests like cutworms from entering and reduces the loss of sap. Experiments have demonstrated that 99% of wounds protected with clay remain free from pests and heal within the same season. In contrast, without protection, over 80% of wounds are affected by cutworms, and more than 20% fail to heal.
For older wounds that haven't healed after two years, it's advisable to apply a rot-clearing treatment twice a year—once in spring and once in autumn. This helps prevent bacterial infections and has an effectiveness rate of over 98%.
Finally, for large saw cuts, tree bridges can be applied in the spring. This technique allows the tree to reconnect and resume nutrient exchange more quickly, promoting faster recovery.
By following these simple yet effective steps, growers can significantly improve the health and productivity of their fruit trees.
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