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At present, fruit trees such as apples and pears are in their flowering stage, which is also the peak time for the emergence of adult beetles and buds. The chafer beetle, a member of the scarab family, has a hardened exoskeleton that makes it difficult for most insecticides to penetrate. When sprayed, these beetles tend to fly away and return later, making chemical control a challenging and often ineffective method.
Using sweet and sour liquid to trap the beetles has been a long-standing, cost-effective solution. It saves both time and labor, doesn’t harm the environment, and leaves no harmful residue. This method has proven to be highly effective, making it one of the best choices for farmers looking to manage beetle infestations naturally.
The sweet and sour liquid works by emitting a volatile scent that attracts the beetles. The larger the container, the more the liquid evaporates, which increases the attraction range. Studies have shown that bottles with a diameter of around 10 cm provide optimal results.
The placement of the bottle also plays a key role in its effectiveness. It should be hung on the outer branches of the tree canopy, in the middle to upper part, so that distant beetles can easily detect the scent. Additionally, it’s important to consider wind direction and hang the bottle where the scent can be carried effectively.
Beetles have a good sense of color and tend to be attracted to bright colors that resemble flowers or fruits. Using bottles in colors like red, yellow, orange, or purple can significantly increase the trapping success rate. In contrast, white-colored bottles are less effective. By combining the right scent and color, you can achieve a dual effect that enhances beetle capture.
The formula for the sweet and sour liquid is simple: mix 1 part brown sugar, 2 parts vinegar, 0.4 parts white spirit, 0.1 part trichlorfon, and 10 parts water. To prepare it, first boil the brown sugar and water in a pot, then add the vinegar once cooled. Finally, mix in the white spirit and trichlorfon thoroughly.
This natural and environmentally friendly approach not only helps reduce pest damage but also supports sustainable farming practices. With proper setup and maintenance, this method can become a reliable and efficient tool for managing chafer beetles in orchards.