Odors from nymphal exuviae attract nymphs and gravid females of the cotton seed bug, Oxycarenus hyalinipennis (Hemiptera: Oxycarenidae)

IF 3.3 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2026-04-01 Epub Date: 2025-12-12 DOI:10.1016/j.cropro.2025.107521

Ahmed M. Saveer, Gundersen-Rindal Dawn, Aijun Zhang

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引用次数: 0

Abstract

The cotton seed bug (CSB), Oxycarenus hyalinipennis (Hemiptera: Oxycarenidae), globally emerging pest native to Africa, is a serious insect pest of cotton, posing a significant threat to crop yield and quality. Both nymphs and adults feed on developing cotton seeds. Volatile organic compounds (VOCs) are key mediators of behavioral responses in heteropteran insects, including CSB, influencing aggregation, mating, and oviposition. In this study, we evaluated the behavioral role of volatiles emitted from nymph exuviae of CSB. Using a combination of Y-tube olfactometer, dual-choice refuge, and dual-choice oviposition bioassays, we assessed the responses of different developmental stages and reproductive statuses to exuviae-associated VOCs. Our results showed that nymphs and mated females were significantly attracted to nymph exuviae VOCs, with nymphs showing >78% and mated females >73% preference in both the Y-tube and refuge assays, whereas unmated females and males (mated and unmated) exhibited no attraction or a slight aversion. Furthermore, gravid females preferentially oviposited on cotton seeds exposed to nymph exuviae VOCs, suggesting that these chemical cues signal suitable oviposition sites, optimizing the chances for the offspring survivorship. This study provides the first evidence that exuviae-associated VOCs in O. hyalinipennis serve as multifunctional semiochemicals, guiding both aggregation and reproductive behavior. These findings offer new insights into the chemical ecology of CSB and highlight potential avenues for semiochemical-based pest management strategies to control CSB population, including the development of attract-and-kill systems for use in integrated pest management (IPM) programs.

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棉籽虫（半翅目：棉籽虫科）的若虫和受精卵散发出气味。

棉花籽虫（Oxycarenus hyalinipennis，半翅目：Oxycarenus hyalinipennis）是一种全球新兴害虫，原产于非洲，是棉花的严重害虫，对作物产量和品质构成严重威胁。若虫和成虫都以发育中的棉籽为食。挥发性有机化合物（VOCs）是异翅目昆虫（包括CSB）行为反应的关键介质，影响聚集、交配和产卵。在本研究中，我们评估了CSB若虫蜕皮挥发物的行为作用。采用y管嗅觉测定法、双选择避难法和双选择产卵法，研究了不同发育阶段和生殖状态对挥发性有机化合物的反应。结果表明，若虫和交配雌虫对若虫分泌物的挥发性有机化合物有明显的吸引力，在y管和避难所试验中，若虫和交配雌虫的偏好分别为78%和73%，而未交配雌虫和雄虫（交配和未交配）则没有吸引力或有轻微的厌恶。此外，受精后的雌棉铃虫更倾向于在暴露于若虫挥发性有机化合物的棉籽上产卵，这表明这些化学信号表明了合适的产卵地点，从而优化了后代的存活率。该研究首次证明了透明鳍蛙的挥发性有机化合物是一种多功能的半化学物质，可以指导它们的聚集和繁殖行为。这些发现为CSB的化学生态学提供了新的见解，并强调了基于半化学的害虫管理策略来控制CSB种群的潜在途径，包括开发用于害虫综合管理（IPM）计划的吸引和杀死系统。

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

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.