Abstract:

Drosophila is the primary pest of bayberry, posing a significant threat to the high-quality and sustainable development of the bayberry industry in Zhejiang Province. To explore cost-effective green control measures and integrate them with unified prevention and control to manage the occurrence and damage of bayberry Drosophila, a field trial was conducted in Xichen Village, Guanlu Town, Xianju County in 2023 to evaluate the control effects of different green measures of prevention and control on bayberry Drosophila. The results showed that the unified prevention and control measures demonstrated better efficacy in preventing and controlling bayberry Drosophila in the early and middle stages of bayberry ripening and harvesting, with relative control effects of 100.0% and 90.3% respectively after spraying 7 day and 14 day. However, their effectiveness in controlling bayberry Drosophila during the middle and later stages of bayberry ripening and harvesting was weakened, with a relative control effect of only 19.2% after 21 days of spraying. The Romance bayberry facility cultivation technology, in combination with unified prevention and control, proved to be the most effective, achieving relative control effects of 100.0%, 98.4%, and 79.6% respectively after 7, 14, and 21 days of spraying, essentially controlling the occurrence and damage of bayberry Drosophila throughout the bayberry ripening and harvesting stages. The food source trapping and killing technology, combined with unified prevention and control, showed a synergetic effect in the early and middle stages of bayberry ripening and harvesting, with relative control effects of 100.0% and 95.2% respectively after spraying 7 day and 14 day. However, in the event of a large outbreak of bayberry Drosophila, despite an average of 135.7 adult Drosophila trapped and killed per bottle during the 7 days from the peak to the end of the bayberry ripening and harvesting period, the relative control effect was only 43.6% after 21 days of spraying, failing to effectively control the outbreak of bayberry Drosophila during the middle and later stages of bayberry ripening and harvesting. Further optimization of the technical measures is necessary. Additionally, this article briefly discussed the existing problems in prevention and control on bayberry Drosophila and the relative advantages, disadvantages, and application prospects of the tested prevention and control measures.

Key words: bayberry, Drosophila, green prevention and control, unified prevention and control, food source trapping and killing