{"title":"Host-plant volatiles enhance the attraction of Cnaphalocrocis medinalis (Lepidoptera: Crambidae) to sex pheromone","authors":"Hai-Tao Du, Yao Li, Jun Zhu, Fang Liu","doi":"10.1007/s00049-022-00372-w","DOIUrl":null,"url":null,"abstract":"<div><p><i>Cnaphalocrocis medinalis</i> Guenée (Lepidoptera: Pyralidae) is a notorious pest of rice, <i>Oryza sativa</i> L. (Poaceae). Sex pheromones and host-plant volatiles can trap <i>C. medinalis</i> 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, (<i>Z</i>)-3-hexenal, (<i>E</i>)-2-hexenal, octanal, valeraldehyde, and methyl salicylate, on the attraction of <i>C. medinalis</i> to the female-produced sex pheromones in electroantennography. The addition of (<i>E</i>)-2-hexenal, methyl salicylate, valeraldehyde, and (<i>Z</i>)-3-hexenal increased electroantennogram response of <i>C. medinalis</i> to sex pheromones. Further behavioral testing in wind tunnel experiments indicated that additive (<i>E</i>)-2-hexenal or methyl salicylate stimulated the landing behaviors of both male and female <i>C. medinalis</i> compared with sex pheromones alone. Field evaluations showed that mixtures of sex pheromones and (<i>E</i>)-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 (<i>E</i>)-2-hexenal, the attraction of <i>C. medinalis</i> 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 <i>C. medinalis</i> using host-plant volatiles and insect sex pheromones.</p></div>","PeriodicalId":515,"journal":{"name":"Chemoecology","volume":"32 3","pages":"129 - 138"},"PeriodicalIF":1.6000,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemoecology","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s00049-022-00372-w","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
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.
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.
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