Three methods for controlling fruit pests in autumn
The trunk coating method is an effective technique for controlling pests such as aphids, flower thrips, spider mites, and scale insects on fruit trees like hawthorn and cherry. This approach involves applying dimethoate to the tree trunks at a height of about 2 meters from the ground. Once the solution is absorbed by the tree, it is transported throughout the entire plant. When pests feed on the treated areas, they become poisoned and die. Using plastic film to cover the treated area enhances the effectiveness of this method.
For borer pests such as longhorned beetles, pupae mosquitoes, and pine shoot borers, which damage trunks, branches, and bark, a different treatment is needed. If visible wormholes are present on the tree surface, a syringe can be used to inject the pesticide directly into the hole. If fresh sawdust is found around the wormhole, it indicates the presence of larvae inside. At this point, 1 to 2 ml of 40% omethoate diluted five times should be injected into the hole, followed by sealing with soil to prevent evaporation. This method can control up to 95% of pests within the wormholes. However, if no visible wormholes are present—such as in the case of gnat-mosquitoes—only large "tumors" may appear on the trunk or major branches (known as "galls" in forestry). In such cases, drill 3-4 small holes into the tumor and inject 1 ml of omethoate solution into each.
Another effective method is root application, where the pesticide is buried directly in the soil around the tree roots. First, dig a circular trench approximately 0.5 to 1.5 meters away from the base of the tree. Then, place 3% carbofuran in the trench. For young trees, use 100 to 150 grams of the chemical, while mature trees require about 500 grams. This method helps control leaf-feeding pests, especially aphids, and provides protection for 1 to 2 months.
The root bottle method is another practical option. Begin by filling a plastic bottle with 40% omethoate diluted five times. Next, excavate the soil around the tree’s base to expose the roots. Select a root that is not thicker than a finger and insert it into the bottle. Make sure the root end is placed at the bottom of the bottle. Finally, cover the bottle with soil and wrap it with plastic to keep it secure. As the roots absorb the solution, the pesticide is quickly transported through the tree’s vascular system, effectively targeting pests throughout the plant.
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