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You S, You M, Niu D. Identification of floral volatiles from Fagopyrum esculentum that attract Cotesia vestalis with potentially better biocontrol efficacy against Plutella xylostella. Pest Manag Sci 2024; 80:763-775. [PMID: 37774133 DOI: 10.1002/ps.7808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 09/21/2023] [Accepted: 09/30/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND Nectar plants provide extra nourishment for parasitoids, which can utilize floral volatiles to locate nectar-rich flowers. A promising strategy is to screen potential floral species based on the wasps' olfactory preferences for nectar sources, and to ensure their suitability for both natural enemies and targeted pests. Cotesia vestalis (Haliday) is a dominant parasitoid of the oligophagous pest Plutella xylostella, which poses a significant threat to cruciferous vegetables globally. However, the chemical cues in plant-parasitoid complexes mediating Cotesia vestalis to locate nectar food resources and the positive effect of nectar plants on the Cotesia vestalis population are poorly understood. RESULTS The results showed that Fagopyrum esculentum was the most attractive plant that attracted Cotesia vestalis, not Plutella xylostella in 44 flowering plants from 19 families. 1,2-Diethyl benzene and 1,4-diethyl benzene, identified from the floral volatiles from F. esculentum in full bloom, were found to elicit dose-dependent electrophysiological responses and attract Cotesia vestalis adults, demonstrating their potential as semiochemicals. Moreover, the age-stage, two-sex life table revealed that feeding on nectar food increased the efficacy of Cotesia vestalis adults against Plutella xylostella. CONCLUSION In summary, the findings provide insights into the chemical ecology of plant-parasitoid complexes and support the potential use of F. esculentum as insectary plants in habitat manipulation against Plutella xylostella by supplying natural nectar food for the Cotesia vestalis population. Our results suggest an attract and reward strategy based on an attractant for Cotesia vestalis to control Plutella xylostella, or the development of volatile-based artificial food for Cotesia vestalis. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Shijun You
- State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- International Joint Research Laboratory of Ecological Pest Control, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture and Rural Affairs, Fuzhou, China
- Key Laboratory of Green Control of Insect Pests, Fujian Province University, Fuzhou, China
| | - Minsheng You
- State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- International Joint Research Laboratory of Ecological Pest Control, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture and Rural Affairs, Fuzhou, China
- Key Laboratory of Green Control of Insect Pests, Fujian Province University, Fuzhou, China
| | - Dongsheng Niu
- State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- International Joint Research Laboratory of Ecological Pest Control, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture and Rural Affairs, Fuzhou, China
- Key Laboratory of Green Control of Insect Pests, Fujian Province University, Fuzhou, China
- Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot, China
- Key Laboratory of Biohazard Monitoring and Green Prevention and Control for Artificial Grassland, Ministry of Agriculture and Rural Affairs, Hohhot, China
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Hogg BN, Nelson EH, Daane KM. A comparison of candidate banker plants for management of pests in lettuce. Environ Entomol 2023; 52:379-390. [PMID: 37043620 DOI: 10.1093/ee/nvad029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 02/15/2023] [Accepted: 03/22/2023] [Indexed: 06/17/2023]
Abstract
Agricultural systems are often lacking in resources for natural enemies. Providing alternative prey can help natural enemies persist through periods of low pest abundance, although this approach has been rarely commercially implemented in open field crops. In this study, we tested the potential of eight plant species to provide alternative prey to natural enemies in lettuce fields over a 2-yr period. Results showed that the tested plants would not act as sources of the lettuce aphid Nasonovia ribisnigri Mosley (Hemiptera: Aphididae), the primary lettuce pest. Of the banker plants tested, barley contained high numbers of non-lettuce aphids and appeared to provide reliable habitat for hoverfly larvae. However, lettuce aphids were present on lettuce early in the season, and may have dwarfed any effects of nonlettuce aphids on natural enemy populations. Numbers of hoverfly larvae were also high in lettuce, but did not appear to track numbers of non-lettuce aphids on banker plants. In contrast, numbers of lacewing larvae were highest on plants containing high numbers of non-lettuce aphids, and predatory hemipterans appeared to be associated with numbers of thrips on banker plants. Although barley showed promise as a source of alternative aphids, it did not appear to improve pest control in the adjacent crop.
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Affiliation(s)
- Brian N Hogg
- USDA-ARS, Invasive Species and Pollinator Health Research Unit, 800 Buchanan Street, Albany, CA 94710, USA
- Department of Environmental Science Policy and Management, University of California, 137 Mulford Hall, Berkeley, CA 94720, USA
| | - Erik H Nelson
- Department of Environmental Science Policy and Management, University of California, 137 Mulford Hall, Berkeley, CA 94720, USA
- Department of Natural Sciences and Mathematics, Dominican University of California, 50 Acacia Avenue, San Rafael, CA 94901, USA
| | - Kent M Daane
- Department of Environmental Science Policy and Management, University of California, 137 Mulford Hall, Berkeley, CA 94720, USA
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Andrade KA, Aguiar-Menezes EL, Gonçalves-Esteves V, Mendonça CBF, Vieira GRM, Melo SJ, Magalhães JLA, Melo GJB. Pollen Ingestion by Chrysoperla externa (Hagen) Adults in a Diversified Organic Agroecosystem. Neotrop Entomol 2018; 47:118-130. [PMID: 28664528 DOI: 10.1007/s13744-017-0537-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 05/31/2017] [Indexed: 06/07/2023]
Abstract
Chrysoperla externa (Hagen) larvae prey on pest insects and mites in agroecosystems, and adults mainly feed on pollen, nectar, and honeydew. Therefore, preserving this lacewing in crop systems depends on having plants that provide these resources. The objectives of this research were to identify pollen grains ingested by Ch. externa adults collected in a diversified organic agroecosystem and to evaluate whether there is a difference in the amount of ingested pollen grains between males and females. The adults of Ch. externa were collected in four different crops during 13 months in Seropédica, state of Rio de Janeiro, Brazil, using a collecting net. The adults were killed and underwent acetolysis, in order to recover the pollen in the gut. A total of 37,441 pollen grains from 19 Angiospermae families were found, besides 16 Pteridophyte spores. Among the recognized pollen grains, those of Poaceae were the majority, both in frequency of occurrence (87.5%) and in quantity (33496), and were found and recovered in every month of collection. Females and males ingested, respectively, 71.9 and 28.1% of the total number of Angiospermae pollen grains consumed by both sexes. The highest number of Poaceae pollens was obtained from the females (72.1% of the total number of Poaceae pollen, recovered from females + males). Taken as a whole, this study showed that adults of Ch. externa find possibilities to maintain throughout the year, in different crops, but the main source of pollen to males and females was Poaceae plants.
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Affiliation(s)
- K A Andrade
- Programa de Pós-Graduação em Fitossanidade e Biotecnologia Aplicada, Univ Federal Rural do Rio de Janeiro, Seropédica, RJ, Brasil
| | - E L Aguiar-Menezes
- Depto de Entomologia e Fitopatologia, Instituto de Ciência Biológicas e da Saúde, Univ Federal Rural do Rio de Janeiro, Rod. BR 465, km 7, 23897-000, Seropédica, RJ, Brasil.
| | - V Gonçalves-Esteves
- Depto de Botânica, Univ Federal do Rio de Janeiro, Museu Nacional, Rio de Janeiro, RJ, Brasil
| | - C B F Mendonça
- Depto de Botânica, Univ Federal do Rio de Janeiro, Museu Nacional, Rio de Janeiro, RJ, Brasil
| | - G R M Vieira
- Depto de Botânica, Univ Federal do Rio de Janeiro, Museu Nacional, Rio de Janeiro, RJ, Brasil
| | - S J Melo
- Depto de Entomologia e Fitopatologia, Instituto de Ciência Biológicas e da Saúde, Univ Federal Rural do Rio de Janeiro, Rod. BR 465, km 7, 23897-000, Seropédica, RJ, Brasil
| | - J L A Magalhães
- Depto de Entomologia e Fitopatologia, Instituto de Ciência Biológicas e da Saúde, Univ Federal Rural do Rio de Janeiro, Rod. BR 465, km 7, 23897-000, Seropédica, RJ, Brasil
| | - G J B Melo
- Depto de Entomologia e Fitopatologia, Instituto de Ciência Biológicas e da Saúde, Univ Federal Rural do Rio de Janeiro, Rod. BR 465, km 7, 23897-000, Seropédica, RJ, Brasil
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