Host-plant volatiles enhance the attraction of Cnaphalocrocis medinalis (Lepidoptera: Crambidae) to sex pheromone

IF 1.6 3区环境科学与生态学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY

Chemoecology Pub Date : 2021-05-07 DOI:10.21203/RS.3.RS-484527/V1

Hailing Du, Yao Li, Jun Zhu, Fang Liu

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引用次数: 2

Abstract

Cnaphalocrocis medinalis Guenée (Lepidoptera: Pyralidae) is a notorious pest of rice, Oryza sativa L. (Poaceae). Sex pheromones and host-plant volatiles can trap C. medinalis separately. To improve the trap efficiency of synthetic sex pheromone blend, we first tested the synergistic effect of 8 host-plant volatiles, including 2-phenylethanol, 1-hexanol, 1-heptanol, ( Z )-3-hexenal, ( E )-2-hexenal, octanal, valeraldehyde, and methyl salicylate, on the attraction of C. medinalis to the female-produced sex pheromones in electroantennography. The addition of ( E )-2-hexenal, methyl salicylate, valeraldehyde, and ( Z )-3-hexenal increased electroantennogram response of C. medinalis to sex pheromones. Further behavioral testing in wind tunnel experiments indicated that additive ( E )-2-hexenal or methyl salicylate stimulated the landing behaviors of both male and female C. medinalis compared with sex pheromones alone. Field evaluations showed that mixtures of sex pheromones and ( E )-2-hexenal /methyl salicylate resulted in significantly higher catches to male moths than sex pheromones alone. Using 1:1 and 1:10 combinations of the sex pheromones and ( E )-2-hexenal, the attraction of C. medinalis to mixtures showed a synergistic effect of 95% and 110%, respectively. Furthermore, 1:1 and 1:10 mixtures of the sex pheromones and methyl salicylate exhibited a synergistic effect of 69% and 146%, respectively. These results may provide the basis for developing efficient pest management strategies against C. medinalis using host-plant volatiles and insect sex pheromones.

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寄主植物挥发物增强稻纵卷叶螟对性信息素的吸引力

稻纵卷叶螟(Cnaphalocrocis medinalis guen)是水稻(禾科)的主要害虫。性信息素和寄主植物挥发物可以分别诱捕稻纵卷叶草。为了提高合成性信息素混合物的诱捕效率，我们首先用电触电法测试了8种寄主植物挥发物(2-苯乙醇、1-己醇、1-庚醇、(Z)-3-己烯醛、(E)-2-己烯醛、辛烷醛、戊醛和水杨酸甲酯)对稻草对雌性产生的性信息素的吸引作用。(E)-2-己烯醛、水杨酸甲酯、戊醛和(Z)-3-己烯醛的加入增加了稻纵卷叶蝉对性信息素的触角电位反应。进一步的风洞实验行为测试表明，与单独的性信息素相比，添加(E)-2-己烯醛或水杨酸甲酯均能刺激雄性和雌性稻纵蝽的着陆行为。实地评价表明，性信息素与(E)-2-己烯醛/水杨酸甲酯混合使用对雄蛾的捕获量明显高于单独使用性信息素。性信息素与(E)-2-己烯醛以1:1和1:10的比例配伍，对稻纵卷草的吸引效果分别为95%和110%。性信息素与水杨酸甲酯的配伍比例为1:1和1:10，增效效果分别为69%和146%。这些结果可为利用寄主植物挥发物和昆虫性信息素制定有效的稻纵卷叶虫防治策略提供依据。

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

Chemoecology 环境科学-生化与分子生物学

CiteScore

4.20

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： It is the aim of Chemoecology to promote and stimulate basic science in the field of chemical ecology by publishing research papers that integrate evolution and/or ecology and chemistry in an attempt to increase our understanding of the biological significance of natural products. Its scopes cover the evolutionary biology, mechanisms and chemistry of biotic interactions and the evolution and synthesis of the underlying natural products. Manuscripts on the evolution and ecology of trophic relationships, intra- and interspecific communication, competition, and other kinds of chemical communication in all types of organismic interactions will be considered suitable for publication. Ecological studies of trophic interactions will be considered also if they are based on the information of the transmission of natural products (e.g. fatty acids) through the food-chain. Chemoecology further publishes papers that relate to the evolution and ecology of interactions mediated by non-volatile compounds (e.g. adhesive secretions). Mechanistic approaches may include the identification, biosynthesis and metabolism of substances that carry information and the elucidation of receptor- and transduction systems using physiological, biochemical and molecular techniques. Papers describing the structure and functional morphology of organs involved in chemical communication will also be considered.