| 摘要: |
| 三叶鱼藤可危害红树、半红树和其他滨海植被,是一种对红树林生态系统危害极大的植物,其扩散对红树林的生物多样性和生态功能造成了严重的影响。针对现有的三叶鱼藤治理方法存在的不足,本研究提出了一种新的生物防治方法,即利用大花菟丝子寄生三叶鱼藤进行治理。在平均面积为453m2的24个样方的三叶鱼藤上接种大花菟丝子,3个月以上的消杀率可达到91%。作用机制是：大花菟丝子寄生三叶鱼藤,吸取寄主的营养物质,且形成大量的黄色茎段覆盖整个寄主植物的表面,从而阻碍三叶鱼藤的光合作用和水分吸收,最终导致寄主营养不良而死亡。菟丝子虽能产生吸盘与红树植物短暂连接,但不能成功寄生,49天后菟丝子均死亡,菟丝子对支持木无明显影响。菟丝灵和饱和盐水均可控制大花菟丝子,喷洒6天后菟丝子的减退率为100%。以上结果表明：利用大花菟丝子治理三叶鱼藤是有效的,同时具有安全性和环保性。与传统的物理清除相比,此生物防治方法具有更高的可持续性和可控性,且防治成本仅为人工清理的2%。 |
| 关键词: 大花菟丝子 三叶鱼藤 生物防治 红树林 |
| DOI： |
| 投稿时间：2024-07-04修订日期：2024-10-12 |
| 基金项目:国家自然科学基金地区科学(32060282)；国家自然科学基金联合(U21A2022)；广西红树林保护与利用重点实验室基金资助(GKLMC-20A06);广西科学院改革发展专项(2024YGFZ504-101)*通讯作者 Corresponding author. E-mail: liuwenai@126.com ,吴慧莹 |
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| Biological control effect of Cuscuta reflexa on Derris trifoliate |
|
liuwenai, xueyunhong, WUHUIYING
|
| (Guangxi Academy of Marine Sciences) |
| Abstract: |
| Derris trifoliate can harm mangrove and mangrove associate plants and its a plant that is extremely harmful to mangrove ecosystems, and its proliferation and reproduction have caused serious impacts on the biodiversity and ecological functions of mangrove forests. In response to the shortcomings of the existing management methods of D. trifoliate, this study proposed a new biological control method, i.e., the use of C. reflexa to parasitize D. trifoliate. Inoculation of Cuscuta reflexa on D. trifoliate in 24 sampling plots with an average area of 453 m2 resulted in an elimination rate of 91% over 3 months. The mechanism of action is that C. reflexa parasitizes D. trifoliate, sucks nutrients from the host, and forms a large number of yellow stems that cover the entire surface of the host plant, thus preventing photosynthesis and water absorption of D. trifoliate., and ultimately leading to the death of the host due to malnutrition. Although Cuscuta was able to produce haustorial structures to connect with the mangrove plants briefly, it could not successfully parasitize them, and all Cuscuta died after 49 days, and Cuscuta had no significant effect on the supporting wood. Both pesticide and saturated saline water could control the C. reflexa, and the reduction rate of Cuscuta was 100% after 6 days of spraying. The results indicate that the use of C. reflexa to control D. trifoliate is effective, as well as safe and environmentally friendly. This biological control method is more sustainable and controllable than traditional physical removal, and the control cost is only 2% of manual cleaning. |
| Key words: Cuscuta reflexa Derris trifoliate biological control mangrove |
