Mixture of Synthetic Plant Volatiles Attracts More Stick Tea Thrips <i>Dendrothrips minowai</i> Priesner (Thysanoptera: Thripidae) and the Application as an Attractant in Tea Plantations

oleh: Zhengwei Xu, Guowei Zhang, Yan Qiu, Zongxiu Luo, Xiaoming Cai, Zhaoqun Li, Lei Bian, Nanxia Fu, Li Zhou, Fida Hussain Magsi, Zongmao Chen, Xiaoming Zhang, Chunli Xiu

Format: Article
Diterbitkan: MDPI AG 2024-07-01

Deskripsi

The stick tea thrip (<i>Dendrothrips minowai</i>) is one of the most serious sucking pests of tea plants (<i>Camellia sinensis</i>) in China, North Korea, and Japan. Plant volatile lures are widely used for both monitoring and mass trapping. Previously, we demonstrated that sticky traps baited with <i>p</i>-anisaldehyde, eugenol, farnesene, or 3-methyl butanal captured significantly more <i>D. minowai</i> in tea plantations, with <i>p</i>-anisaldehyde notably capturing the most. In this study, we showed that <i>D. minowai</i> adults exhibited significantly higher attraction to mixtures of <i>p</i>-anisaldehyde, eugenol, and farnesene compared to an equivalent dose of <i>p</i>-anisaldehyde alone in H-tube olfactometer assays under laboratory conditions. Moreover, in field experiments conducted in 2022, rubber septa impregnated with a ternary blend of <i>p</i>-anisaldehyde, eugenol, and farnesene (at 3–4.5 mg and a ratio of 3:1:1) captured the highest number of adults on sticky traps, outperforming traps bailed with individual components or a solvent control over two weeks. Significantly, the mass trapping strategy employing these lures achieved control efficacies ranging from 62.8% to 70.7% when compared to traps without attractant, which achieved control efficacies of only 14.2% to 35.4% across three test sites in 2023. These results indicate that the combination of <i>p</i>-anisaldehyde, eugenol, and farnesene exhibits an additive or synergistic effect on <i>D. minowai</i>. In conclusion, our findings establish a theoretical framework and provide practical technological support for integrating attractant-based strategies into comprehensive thrips management strategies.