Response of hibiscus mealybug (Hemiptera: Pseudococcidae) to citrus volatiles induced by mechanical injury.

IF 1.8 3区 农林科学 Q2 ENTOMOLOGY Environmental Entomology Pub Date : 2024-10-26 DOI:10.1093/ee/nvae103
David Olabiyi, Lauren M Diepenbrock, Xavier Martini, Lukasz L Stelinski
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Abstract

Hibiscus mealybug, Nipaecoccus viridis (Newstead) (Hemiptera: Pseudococcidae), is a recent invasive pest of citrus and many other crops in Florida. Nipaecoccus viridis attacks all above ground parts of citrus trees and heavy infestation can cause leaf drop and premature abortion of developing fruits. We quantified greater captures of N. viridis in cardboard band traps on areas of citrus trees that were intentionally injured by mechanical rasping of epidermal tissues as compared with similar but uninjured citrus branches. Direct field collection of headspace volatiles from mechanically injured or intact citrus branches revealed both qualitative and quantitative differences. Certain volatiles (γ-terpinene, citronellal, citronellyl acetate, β-E-farnesene, α-humulene, and α-E-E-farnesene) were only present in samples from damaged citrus branches. Behavioral assays using a laboratory Y-tube olfactometer revealed attraction of N. viridis to volatiles associated with mechanical damage of citrus including synthetic β-ocimene, γ-terpinene, sabinene, isomers of farnesene, and citronellal when loaded into lures at either of 2 concentrations (0.01 or 0.1 µg/µl). Subsequent field trapping experiments confirmed increased captures of various life stages of N. viridis in cardboard band traps baited with a 10.0 µg/µl concentration of farnesene:ocimene:sabinene blend (in 7:13:17 ratio), as well as those releasing either farnesene or ocimene alone at this same concentration, as compared with the mineral oil (diluent) negative control. Our results indicate that common plant related terpenes released by citrus following mechanical damage may be useful for development of an effective monitoring trap for N. viridis.

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木槿蚧(半知菌目:伪球蚧科)对机械损伤诱发的柑橘挥发物的反应。
芙蓉蚧(Nipaecoccus viridis (Newstead))(半翅目:伪球虫科)是最近入侵佛罗里达州柑橘和许多其他作物的害虫。Nipaecoccus viridis 攻击柑橘树的所有地上部分,严重时会导致落叶和发育中的果实过早流产。与类似但未受伤的柑橘树枝相比,我们用机械碾压表皮组织的方法故意伤害柑橘树的部位,通过纸板带式诱捕器捕获了更多的 N. viridis。从机械损伤的柑橘树枝和完好的柑橘树枝上直接采集顶空挥发性物质,可以发现两者在质量和数量上的差异。某些挥发物(γ-萜品烯、香茅醛、乙酸香茅酯、β-E-法呢烯、α-胡麻烯和α-E-E-法呢烯)只存在于受损柑橘枝条的样本中。使用实验室 Y 型管嗅觉测定仪进行的行为测定显示,当将两种浓度(0.01 或 0.1 µg/µl)的诱饵加入柑橘机械损伤相关挥发性物质(包括合成的 β-ocimene、γ-萜品烯、沙比利烯、法呢烯异构体和香茅醛)中时,N. viridis 会被这些挥发性物质吸引。随后的现场诱捕实验证实,与矿物油(稀释剂)阴性对照组相比,使用 10.0 µg/µl 浓度的法尼烯:欧茜烯:沙比利烯混合物(比例为 7:13:17)作为诱饵的纸板带式诱捕器,以及在相同浓度下单独释放法尼烯或欧茜烯的纸板带式诱捕器,都能捕获更多不同生命阶段的 N. viridis。我们的研究结果表明,柑橘在受到机械损伤后释放的常见植物相关萜烯可能有助于开发一种有效的病毒蛱蝶监测捕捉器。
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来源期刊
Environmental Entomology
Environmental Entomology 生物-昆虫学
CiteScore
3.90
自引率
5.90%
发文量
97
审稿时长
3-8 weeks
期刊介绍: Environmental Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes reports on the interaction of insects with the biological, chemical, and physical aspects of their environment. In addition to research papers, Environmental Entomology publishes Reviews, interpretive articles in a Forum section, and Letters to the Editor.
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