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Tao YX, Shan S, Dewer Y, Wang SN, Khashaveh A, Li RJ, Zhang YJ. n-octyl acrylate is a candidate sex pheromone component involved in courtship in parasitoid wasp Microplitis mediator. INSECT SCIENCE 2024; 31:1200-1210. [PMID: 37969037 DOI: 10.1111/1744-7917.13297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/11/2023] [Accepted: 10/17/2023] [Indexed: 11/17/2023]
Abstract
Sex pheromones are considered to play critical roles in partner communication of most parasitic Hymenoptera. However, the identification of sex pheromone components remains limited to a few families of parasitoid wasps. In this study, we functionally characterized a candidate sex pheromone component in Microplitis mediator (Hymenoptera: Braconidae), a solitary parasitoid of Noctuidae insects. We found that the body surface extract from female wasps could significantly stimulate courtship behavior of males. Gas chromatography-electroantennographic detection (GC-EAD) analysis revealed that a candidate semiochemical from extract triggered significant electrophysiological response of antennae of males. By performing gas chromatography-mass spectrometer (GC-MS) measurement, GC-EAD active compound was identified as n-octyl acrylate, a candidate sex pheromone component in female M. mediator. In electroantennogram (EAG) tests, antennae of male wasps showed significantly higher electrophysiological responses to n-octyl acrylate than those of females. Y-tube olfactometer assays indicated that male wasps significantly chose n-octyl acrylate compared with the control. Furthermore, male wasps showed a remarkable preference for n-octyl acrylate in a simulated field condition behavioral trial; simultaneously, n-octyl acrylate standard could also trigger significant courtship behavior in males. We propose that n-octyl acrylate, as a candidate vital sex pheromone component, could be utilized to design behavioral regulators of M. mediator to implement the protection and utilization of natural enemies.
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Affiliation(s)
- Yu-Xiao Tao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Plant Protection, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - Shuang Shan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Youssef Dewer
- Bioassay Research Department, Central Agricultural Pesticide Laboratory, Sabahia Plant Protection Research Station, Agricultural Research Center, Alexandria, Egypt
| | - Shan-Ning Wang
- Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Adel Khashaveh
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Rui-Jun Li
- College of Plant Protection, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - Yong-Jun Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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Li P, Wei Y, Chen G, Sattar A. Perceptual Effects of Walnut Volatiles on the Codling Moth. INSECTS 2024; 15:402. [PMID: 38921117 PMCID: PMC11204062 DOI: 10.3390/insects15060402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/25/2024] [Accepted: 05/27/2024] [Indexed: 06/27/2024]
Abstract
The volatile organic compounds (VOCs) of plant hosts allow insect localization through olfactory recognition. In this study, the oviposition behavior of the codling moth was investigated and the VOCs from different walnut organs were extracted and analyzed to systematically study their composition and content differences. The electrophysiological and behavioral responses of the codling moth to walnut VOCs were measured using gas chromatography-electroantennographic detection (GC-EAD) and a four-arm olfactometer to screen the key active contents. The field investigation results indicated that 90.3% of the eggs spawned by the first generation of adult codling moths were adjacent to the walnut fruits. Walnut VOCs are mainly composed of terpenes, aromatics, and alkanes. Twelve VOCs can produce electroantennogenic (EAG) responses in the codling moths. Both adult males and females exhibit concentration dependence, with notable disparities in their EAG response levels. In the olfactory behavioral bioassay, linalool, eucalyptol, and high doses of geranyl acetate showed repellent effects on the codling moths, while myrcene, β-ocimene, nonanal, methyl salicylate, α-farnesene, and heptaldehyde showed the opposite. The relative levels of heptaldehyde, geranyl acetate, nonanal, and methyl salicylate were high in the fruits, which is intimately related to the localization of the walnut fruit by females. These VOCs can influence the oviposition behavior of codling moths but their application in the control of this pest needs to be confirmed and improved through further field experiments.
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Affiliation(s)
- Peixuan Li
- College of Horticulture, Xinjiang Agricultural University, Urumqi 830052, China;
| | - Yang Wei
- College of Forestry and Landscape Architecture, Xinjiang Agricultural University, Urumqi 830052, China; (Y.W.); (G.C.)
| | - Guoxiang Chen
- College of Forestry and Landscape Architecture, Xinjiang Agricultural University, Urumqi 830052, China; (Y.W.); (G.C.)
| | - Adil Sattar
- College of Forestry and Landscape Architecture, Xinjiang Agricultural University, Urumqi 830052, China; (Y.W.); (G.C.)
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Liu Y, Zhang S, Cao S, Jacquin-Joly E, Zhou Q, Liu Y, Wang G. An odorant receptor mediates the avoidance of Plutella xylostella against parasitoid. BMC Biol 2024; 22:61. [PMID: 38475722 DOI: 10.1186/s12915-024-01862-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 03/06/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND Ecosystems are brimming with myriad compounds, including some at very low concentrations that are indispensable for insect survival and reproduction. Screening strategies for identifying active compounds are typically based on bioassay-guided approaches. RESULTS Here, we selected two candidate odorant receptors from a major pest of cruciferous plants-the diamondback moth Plutella xylostella-as targets to screen for active semiochemicals. One of these ORs, PxylOR16, exhibited a specific, sensitive response to heptanal, with both larvae and adult P. xylostella displaying heptanal avoidance behavior. Gene knockout studies based on CRISPR/Cas9 experimentally confirmed that PxylOR16 mediates this avoidance. Intriguingly, rather than being involved in P. xylostella-host plant interaction, we discovered that P. xylostella recognizes heptanal from the cuticular volatiles of the parasitoid wasp Cotesia vestalis, possibly to avoid parasitization. CONCLUSIONS Our study thus showcases how the deorphanization of odorant receptors can drive discoveries about their complex functions in mediating insect survival. We also demonstrate that the use of odorant receptors as a screening platform could be efficient in identifying new behavioral regulators for application in pest management.
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Affiliation(s)
- Yipeng Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection and Quarantine, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Sai Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Song Cao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Emmanuelle Jacquin-Joly
- Institute of Ecology and Environmental Sciences of Paris, INRAE, Sorbonne Université, CNRS, UPEC, UniversitéParis Cité, 78026, Versailles, IRD, France
| | - Qiong Zhou
- College of Life Sciences, Hunan Normal University, Changsha, 410006, China
| | - Yang Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
| | - Guirong Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China.
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Xu H, Chen S, Wang Y, Pan J, Liu X, Wang C, Wang X, Cui X, Chen X, Li J, Rasmann S. A Faboideae-Specific Floral Scent Betrays Seeds to an Important Granivore Pest. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:12668-12677. [PMID: 37590199 DOI: 10.1021/acs.jafc.3c03196] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Seed predation by insect herbivores reduces crop production worldwide. Foraging on seeds at pre-dispersal generally means that females need to find the suitable host plant within a relatively short timeframe in order to synchronize larval development with seed production. The mechanistic understanding of host finding by seed pests can be harnessed for more sustainable pest management strategies. We here studied the chemical communication between the bean bug Riptortus pedestris, a major pest of legumes, and several crop species and cultivars in the Fabaceae. Via a comparative chemical analysis, we found that 1-octen-3-ol is the principal constituent of the floral scents of most species tested in the subfamily Faboideae, including soybean and faba bean. With field trapping and laboratory bioassays, including electroantennography, we further revealed that this compound can be perceived, and stimulate attraction responses, by R. pedestris nymphs and adults. The addition of 1-octen-3-ol to pheromone traps might therefore improve trapping efficacy for controlling populations of this important granivore pest on legumes.
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Affiliation(s)
- Hao Xu
- College of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
| | - Shuwei Chen
- College of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
| | - Yueying Wang
- Institute of Plant Protection, Suzhou Academy of Agricultural Sciences, Suzhou, Anhui 234000, China
| | - Jinzhi Pan
- Centre of Plant Protection, Fuyang Academy of Agricultural Sciences, Fuyang, Anhui 236000, China
| | - Xingzhou Liu
- Institute of Plant Protection, Suzhou Academy of Agricultural Sciences, Suzhou, Anhui 234000, China
| | - Chaowei Wang
- Institute of Plant Protection, Suzhou Academy of Agricultural Sciences, Suzhou, Anhui 234000, China
| | - Xinxia Wang
- College of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
| | - Xiaoyan Cui
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences/Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing, Jiangsu 210095, China
| | - Xin Chen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences/Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing, Jiangsu 210095, China
| | - Jinbu Li
- College of Plant Protection, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu 210095, China
- Institute of Plant Protection, Suzhou Academy of Agricultural Sciences, Suzhou, Anhui 234000, China
- Suzhou Vocational and Technical College, Suzhou, Anhui 234000, China
| | - Sergio Rasmann
- Institute of Biology, University of Neuchâtel, Rue-Emile-Argand 11, Neuchâtel 2000, Switzerland
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Rodríguez-Flores MS, Falcão SI, Escuredo O, Queijo L, Seijo MC, Vilas-Boas M. Assessment of the In Vivo and In Vitro Release of Chemical Compounds from Vespa velutina. Molecules 2021; 26:molecules26226769. [PMID: 34833861 PMCID: PMC8621894 DOI: 10.3390/molecules26226769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/03/2021] [Accepted: 11/07/2021] [Indexed: 11/24/2022] Open
Abstract
Vespa velutina has been rapidly expanding throughout Galicia since 2012. It is causing human health risks and well-known losses in the beekeeping sector. Control methods are scarce, unspecific, and ineffective. Semiochemicals are insect-derived chemicals that play a role in communication and they could be used an integrated pest management tool alternative to conventional pesticides. A previous determination of the organic chemical profile should be the first step in the study of these semiochemicals. HS-SPME in living individuals and the sting apparatus extraction followed by GC-MS spectrometry were combined to extract a possible profile of these compounds in 43 hornets from Galicia. The identified compounds were hydrocarbons, ketones, terpenes, and fatty acid, and fatty acid esters. Nonanal aldehyde appeared in important concentrations in living individuals. While pentadecane, 8-hexyl- and ethyl oleate were mainly extracted from the venom apparatus. Ketones 2-nonanone, 2-undecanone and 7-nonen-2-one, 4,8-dimethyl- were identified by both procedures, as was 1,7-Nonadiene, 4,8-dimethyl-. Some compounds were detected for the first time in V. velutina such as naphthalene, 1,6-dimethyl-4-(1-methylethyl). The chemical profile by caste was also characterized.
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Affiliation(s)
- M. Shantal Rodríguez-Flores
- Department of Plant Biology and Soil Sciences, Facultad de Ciencias, Campus As Lagoas, University of Vigo, 32004 Ourense, Spain; (O.E.); (M.C.S.)
- Correspondence:
| | - Soraia I. Falcão
- Centro de Investigação de Montanha (CIMO), Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; (S.I.F.); (M.V.-B.)
| | - Olga Escuredo
- Department of Plant Biology and Soil Sciences, Facultad de Ciencias, Campus As Lagoas, University of Vigo, 32004 Ourense, Spain; (O.E.); (M.C.S.)
| | - Luis Queijo
- Department of Mechanical Technology, Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal;
| | - M. Carmen Seijo
- Department of Plant Biology and Soil Sciences, Facultad de Ciencias, Campus As Lagoas, University of Vigo, 32004 Ourense, Spain; (O.E.); (M.C.S.)
| | - Miguel Vilas-Boas
- Centro de Investigação de Montanha (CIMO), Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; (S.I.F.); (M.V.-B.)
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Safari Murhububa I, Tougeron K, Bragard C, Fauconnier ML, Bisimwa Basengere E, Walangululu Masamba J, Hance T. Banana Tree Infected with Banana Bunchy Top Virus Attracts Pentalonia nigronervosa Aphids Through Increased Volatile Organic Compounds Emission. J Chem Ecol 2021; 47:755-767. [PMID: 34463893 DOI: 10.1007/s10886-021-01298-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/28/2021] [Accepted: 07/07/2021] [Indexed: 10/20/2022]
Abstract
Banana plants are affected by various viral diseases, among which the most devastating is the "bunchy top", caused by the Banana bunchy top virus (BBTV) and transmitted by the aphid Pentalonia nigronervosa Coquerel. The effect of BBTV on attraction mechanisms of dessert and plantain banana plants on the vector remains far from elucidated. For that, attractiveness tests were carried out using a two columns olfactometer for apterous aphids, and a flight cage experiment for alate aphids. Volatile Organic Compounds (VOCs) emitted by either healthy or BBTV-infected banana plants were identified using a dynamic extraction system and gas-chromatography mass-spectrometry (GC-MS) analysis. Behavioral results revealed a stronger attraction of aphids towards infected banana plants (independently from the variety), and towards the plantain variety (independently from the infection status). GC-MS results revealed that infected banana plants produced VOCs of the same mixture as healthy banana plants but in much higher quantities. In addition, VOCs produced by dessert and plantain banana plants were different in nature, and plantains produced higher quantities than dessert banana trees. This work opens interesting opportunities for biological control of P. nigronervosa, for example by luring away the aphid from banana plants through manipulation of olfactory cues.
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Affiliation(s)
- Ignace Safari Murhububa
- Earth and Life Institute, Ecology and Biodiversity, UCLouvain, Croix du sud 4-5/L7.07.04, 1348, Louvain-la-Neuve, Belgium. .,Faculté Des Sciences Agronomiques, Université Catholique de Bukavu, Bukavu, Democratic Republic of the Congo.
| | - Kévin Tougeron
- Earth and Life Institute, Ecology and Biodiversity, UCLouvain, Croix du sud 4-5/L7.07.04, 1348, Louvain-la-Neuve, Belgium.,UMR CNRS 7058 EDYSAN (Écologie et Dynamique des Systèmes Anthropisés), Université de Picardie Jules Verne, 33 rue St Leu, 80039, Amiens Cedex,, France
| | - Claude Bragard
- Earth and Life Institute, Applied Microbiology, UCLouvain, Croix du sud 2/L7.05.03, 1348, Louvain-la-Neuve, Belgium
| | - Marie-Laure Fauconnier
- General and Organic Chemistry Laboratory, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
| | - Espoir Bisimwa Basengere
- Faculté Des Sciences Agronomiques, Université Catholique de Bukavu, Bukavu, Democratic Republic of the Congo
| | - Jean Walangululu Masamba
- Faculté Des Sciences Agronomiques, Université Catholique de Bukavu, Bukavu, Democratic Republic of the Congo
| | - Thierry Hance
- Earth and Life Institute, Ecology and Biodiversity, UCLouvain, Croix du sud 4-5/L7.07.04, 1348, Louvain-la-Neuve, Belgium
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