Spodoptera frugiperda Uses Specific Volatiles to Assess Maize Development for Optimal Offspring Survival.

IF 2.7 2区 农林科学 Q1 ENTOMOLOGY
Insects Pub Date : 2025-06-04 DOI:10.3390/insects16060592
Hanbing Li, Peng Wan, Zhihui Zhu, Dong Xu, Shengbo Cong, Min Xu, Haichen Yin
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引用次数: 0

Abstract

Spodoptera frugiperda, a major global agricultural pest, poses significant challenges to chemical control methods due to pesticide resistance and environmental concerns, underscoring the need for sustainable management strategies. Attractants based on host plant volatiles offer a promising eco-friendly approach, but their development for S. frugiperda is hindered by limited research on host recognition mechanisms. This study reveals that female S. frugiperda preferentially oviposit on maize at the seedling stage. Using electrophysiological techniques, we identified p-xylene and (+)-camphor from seedling-stage maize volatiles as key compounds eliciting strong responses in female S. frugiperda. Behavioral assays confirmed that these compounds (p-xylene at the concentration of 5%, 10%, and 20% and (+)-camphor at 1%, 5%, and 10%) significantly attract females, establishing them as the key odor cues for host selection. Moreover, these volatiles are more abundant in seedling-stage maize, suggesting that S. frugiperda assesses maize growth stages based on their concentrations. Importantly, larvae reared on seedling-stage maize exhibited higher survival rates than those on later-stage maize, indicating that oviposition site selection directly affects offspring fitness. These findings demonstrate that S. frugiperda uses p-xylene and (+)-camphor to evaluate maize development and select suitable oviposition sites, thereby enhancing larval survival. This study provides a foundation for developing targeted attractants for S. frugiperda and highlights the seedling stage as a critical period for implementing pest control measures, particularly in autumn maize production, given the higher pest population density during this phase.

夜蛾利用特定挥发物评估玉米发育以获得最佳后代存活。
狐夜蛾是一种全球性的主要农业害虫,由于其对农药的抗性和环境问题,对化学防治方法构成了重大挑战,强调了可持续管理战略的必要性。基于寄主植物挥发物的引诱剂是一种很有前景的生态友好方法,但对寄主识别机制的研究有限,阻碍了其对果蚜的开发。本研究表明,在玉米苗期,雌果蚜优先在玉米上产卵。利用电生理技术,我们从玉米苗期挥发物中鉴定出对二甲苯和(+)-樟脑是引起雌性frugiperda强烈反应的关键化合物。行为分析证实,这些化合物(浓度分别为5%、10%和20%的对二甲苯和浓度分别为1%、5%和10%的(+)-樟脑)对雌性具有显著的吸引力,并确定它们是选择寄主的关键气味线索。此外,这些挥发物在苗期玉米中更为丰富,表明S. frugiperda根据它们的浓度来评估玉米的生长阶段。重要的是,在苗期玉米上饲养的幼虫比在后期玉米上饲养的幼虫存活率更高,这表明产卵地点选择直接影响后代的适合度。这些结果表明,S. frugiperda利用对二甲苯和(+)-樟脑来评价玉米的发育和选择合适的产卵地点,从而提高了幼虫的存活率。本研究为开发有针对性的引诱剂提供了基础,并强调了苗期是实施害虫防治措施的关键时期,特别是在秋季玉米生产中,因为苗期害虫密度较高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Insects
Insects Agricultural and Biological Sciences-Insect Science
CiteScore
5.10
自引率
10.00%
发文量
1013
审稿时长
21.77 days
期刊介绍: Insects (ISSN 2075-4450) is an international, peer-reviewed open access journal of entomology published by MDPI online quarterly. It publishes reviews, research papers and communications related to the biology, physiology and the behavior of insects and arthropods. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.
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