西洛桑德鲁斯 (Xylosandrus ambrosia) 甲虫喜欢幼儿园树种在水压下进行攻击和殖民
Madhav Parajuli1, Cansu Oksel1, Krishna Neupane1
1Department of Agricultural Sciences and Engineering, College of Agriculture, Tennessee State University, Otis L. Floyd Nursery Research Center, McMinnville, TN, USA.
Journal of insect science (Online)
|January 27, 2025
概括
洪水和干旱的压力显著地影响了羊甲虫 (Xylosandrus spp.) 对幼儿园树木的攻击. 在洪水条件下,狗树和红芽树比红树更容易受到甲虫的侵袭.
科学领域:
- 林业和园艺昆虫学 林业和园艺昆虫学
- 植物病理学 植物病理学
- 植物生理学 植物生理学
背景情况:
- 安布罗西亚甲虫是幼苗树的重要害虫.
- 水压力 (洪水和干旱) 对虫宿主选择和殖民的影响尚不清楚.
- 树种对水应激有不同的耐受性,这可能会影响它们对昆虫攻击的易感性.
研究的目的:
- 为了研究羊甲虫对具有不同水应激容忍度的树种的偏好.
- 评估洪水和干旱压力在Xylosandrus ambrosia虫攻击和殖民中的作用.
- 为了确定树木水压力,乙醇含量和甲虫感染之间的关系.
主要方法:
- 在容器中种植的狗木,红芽和红树经历了28天的洪水,干旱或足够的水处理.
- 每三天就会监测一次虫的攻击.
- 使用SPME-GC-MS分析了茎组织的乙醇含量,并剖析了树木以评估画廊形成,真菌殖民和甲虫生命阶段.
主要成果:
- 在洪水压力下,狗木和红芽经历了虫虫的重大攻击,而红树没有受到攻击. 狗树的攻击密度和画廊发展比红树木更高.
- 干旱压力导致的袭击很少,只有一个狗木被感染. 足够水的树木没有受到攻击.
- 在受洪水压力的狗木和红芽中检测到升的乙醇水平,与较高的甲虫活动和Xylosandrus crassiusculus和Xylosandrus germanus的殖民有关.
结论:
- 水应激,特别是洪水,显著改变了树木对虫虫感染的易感性,并观察到特定物种的反应.
- 在洪水条件下,由于乙醇生产增加,狗木和红芽更容易受到虫的攻击.
- 研究结果为幼儿园和景观管理提供了关键的见解,通过考虑树种和水资源管理策略来减轻虫的破坏.
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