The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Denis Thiery - One of the best experts on this subject based on the ideXlab platform.
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Direct benefits from choosing a virgin male in the European grapevine moth, Lobesia botrana.
Animal Behaviour, 2016Co-Authors: Karen Muller, Denis Thiery, Laura Arenas, Jérôme MoreauAbstract:In Lepidoptera, male investment in the ejaculate usually declines over consecutive matings, a depletion that could have profound consequences for female reproductive output. Since successive matings can affect the ability of males to provide phenotypic benefits, there may be strong selection for females to discriminate between males with different mating experience. The aim of our study was to determine whether monandrous females of the European grapevine moth, Lobesia botrana, are able to discriminate between males of different quality based on their mating experience in order to maximize direct benefits (by receiving large spermatophores from virgin males) and minimize mating costs (by avoiding low-quality nonvirgin males). Nonvirgin males produced spermatophores five times smaller than those of virgin males; consequently, mating with nonvirgin males significantly reduced female fecundity and increased their motivation to remate. In a mate preference experiment, we found that females were more likely to mate with virgin males and more frequently rejected nonvirgin mates. Moreover, nonvirgin males required more time to achieve mating than virgin males. Our results suggest that females are able to discriminate between males with different mating experience, and prefer virgin males, thereby maximizing direct benefits associated with receiving large spermatophores.
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Early detection and identification of larval parasitoids in Lobesia botrana using PCR-RFLP method
Biological Control, 2016Co-Authors: Daciana Papura, Adrien Rusch, Pascale Roux, Lionel Delbac, Denis ThieryAbstract:Several larval parasitoid species are natural enemies of the tortricid moths of European vineyards, including the most damaging of these pests, Lobesia botrana. Over the last few years, DNA-based methods have been used for more rapid and accurate detection and identification of parasitoids. In this study, we developed a PCR-RFLP analysis method targeting a mitochondrial cytochrome oxidase I gene fragment after digestion with the restriction enzyme ApoI, for discrimination between four parasitoid species of Lobesia botrana: Campoplex capitator, Exochus tibialis, Elachertus spp. (Hymenoptera, Ichneumonidae) and Phytomyptera nigrina (Diptera, Tachinidae). We assessed the accuracy of this method using populations of L. botrana sampled from eight vineyards located in South-West of France. On a total of 547 L. botrana larvae collected, 252 were analyzed for parasitism using our molecular method whereas the remaining 295 were reared to assess parasitism rates based on emergence. Our PCR-RLFP method showed a mean parasitism rate of 25%, with values ranging from 3% to 50% across vineyards. The levels of parasitism estimated by this method were about three times those estimated after emergence and identification (7.3%). This difference suggests that mortality may occur during parasitoid development, possibly due to encapsulation. Our method revealed that the two dominating parasitoid species were Campoplex capitator (90%) and Phytomyptera nigrina (9%), whereas the emergence of parasitoids found only C. capitator after taxonomical identification. This study revealed that the PCR-RFLP analysis is an appropriate and reliable tool for estimating the biological control potential of a diverse community of parasitoids on the main tortricid moth of grapevine.
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Male larval nutrition affects adult reproductive success in wild European grapevine moth (Lobesia botrana)
Behavioral Ecology and Sociobiology, 2015Co-Authors: Karen Muller, Denis Thiery, Yannick Moret, Jérôme MoreauAbstract:In Lepidoptera, males transfer a spermatophore to females containing sperm and accessory gland secretions that are reinvested into female reproduction, providing a fitness gain to females. One of the key factors shaping male spermatophore size is certainly the resources that males have acquired as larvae. In this study, we investigate how male larval food contributes to shaping the spermatophore quantity and quality and how it affects female reproduction in the European grapevine moth ( Lobesia botrana ). Specifically, we examined the effect of male origin (cultivar or geographical site) on their mating success by scoring individual motivation to mate, male spermatophore size and amount of sperm, and finally female fecundity and fertility. A strong effect of larval cultivar was found on spermatophore size and amount of fertilizing sperm produced by males. These male characteristics had important repercussions on female reproductive output. Females mating with males producing the biggest spermatophore and more fertilizing sperm were the most fecund and fertile. Finally, females were able to recognize males of different quality during the precopulatory phase and changed their mating behavior accordingly. The present results suggest that male nutritional quality could have an important implication for population dynamics.
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Lobesia botrana larvae develop faster in the presence of parasitoids.
PloS one, 2013Co-Authors: Fanny Vogelweith, Denis Thiery, Yannick Moret, Jérôme MoreauAbstract:To combat parasitism hosts often rely on their immune system, which is the last line of defense. However, the immune system may not always be effective, and other non-immunological defenses might be favored to reduce the cost of parasite infection. Here we report that larvae of the moth Lobesia botrana can rapidly accelerate their development and reach maturity earlier in response to cues perceived at a distance from parasitoids. Such a phenotypically plastic life history shift, induced by the perception of deadly enemies in the environment, is likely to be an adaptive defensive strategy to prevent parasitoid attack, and has important implications in host–parasite dynamics.
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Oviposition by Lobesia botrana is stimulated by sugars detected by contact chemoreceptors
Physiological Entomology, 2006Co-Authors: Nevile Maher, Denis Thiery, Erich StädlerAbstract:The influence of glucose, fructose and sucrose on oviposition site selection by Lobesia botrana is studied by combining behavioural and electrophysiological experiments. Oviposition choice assays, using surrogate grapes treated with grape berry surface extracts of Vitis vinifera cv. Merlot at different development stages, show that L. botrana females are most stimulated by extracts of mature berries containing the highest concentrations of glucose and fructose. Choice assays reveal that the oviposition response to these sugars is dose-dependant (with a threshold of the applied solution=10 mM and a maximum stimulation at 1 M) and that females are more sensitive to fructose than to glucose. Tarsal contact-chemoreceptor sensilla are unresponsive to stimulation with sugars but the ovipositor sensilla contain at least one neurone most sensitive to fructose and sucrose with a threshold of approximately 0.5 mM. Corresponding to the behavioural data, glucose is significantly less stimulatory to sensilla than fructose or sucrose. It is argued that fructose may be of special importance for herbivorous insects exploiting fruit as an oviposition site.
Peter Witzgall - One of the best experts on this subject based on the ideXlab platform.
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Chemical Ecology and Management of Lobesia botrana (Lepidoptera: Tortricidae)
Journal of economic entomology, 2011Co-Authors: Claudio Ioriatti, Peter Witzgall, Marco Tasin, Gianfranco Anfora, A. De Cristofaro, Andrea LucchiAbstract:The moth Lobesia botrana (Denis & Schiffermuller) (Lepidoptera: Tortricidae) feeds on grapes (Vitis vinifera L.), reducing yield and increasing susceptibility to fungal infections. L. botrana is among the most economically important insects in Europe and has recently been found in vineyards in Chile, Argentina, and California. Here, we review L. botrana biology and behavior in relation to its larval host (the grapevine) and its natural enemies. We also discuss current and future control strategies in light of our knowledge of chemical ecology, with an emphasis on the use of the sex pheromone-based strategies as an environmentally safe management approach. Pheromone-mediated mating disruption is the most promising technique available on grapes and is currently implemented on ≈140,000 ha in Europe. Experience from several growing areas confirms the importance of collaboration between research, extension, growers, and pheromone-supply companies for the successful implementation of the mating disruption technique. In the vineyards where mating disruption has been successfully applied as an areawide strategy, the reduction in insecticide use has improved the quality of life for growers, consumers, as well as the public living near wine-growing areas and has thereby reduced the conflict between agricultural and urban communities.
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New Pheromone Components of the Grapevine Moth Lobesia botrana
Journal of Chemical Ecology, 2005Co-Authors: Peter Witzgall, Marco Tasin, Hans-ruedi Buser, Gertrud Wegner-kiß, Vicente S. Marco Mancebón, Claudio Ioriatti, Anna-carin Bäckman, Marie Bengtsson, Lutz Lehmann, Wittko FranckeAbstract:Analysis of extracts of sex pheromone glands of grapevine moth females Lobesia botrana showed three previously unidentified compounds, ( E )-7-dodecenyl acetate and the ( E , E )- and ( Z , E )-isomers of 7,9,11-dodecatrienyl acetate. This is the first account of a triply unsaturated pheromone component in a tortricid moth. The monoenic acetate ( E )-7-dodecenyl acetate and the trienic acetate (7 Z ,9 E ,11)-dodecatrienyl acetate significantly enhanced responses of males to the main pheromone compound, (7 E ,9 Z )-7,9-dodecadienyl acetate, in the wind tunnel. The identification of sex pheromone synergists in L. botrana may be of practical importance for the development of integrated pest management systems.
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attractiveness of year old polyethylene isonet sex pheromone dispensers for Lobesia botrana
Entomologia Experimentalis Et Applicata, 2005Co-Authors: G Anfora, Peter Witzgall, Marco Tasin, Anna-carin Bäckman, Antonio De Cristofaro, Clvaudio IoriattiAbstract:In this study, we have compared the release of sex pheromone from mating disruption dispensers exposed in the field for 12 months and from calling females. The main pheromone component of the grapevine moth, Lobesia botrana (D. and S.) (Lepidoptera: Tortricidae), is (E)-7,(Z)-9-dodecadienyl acetate, and a minor component is (Z)-9-dodecenyl acetate. Aged dispensers from two different years emitted a much higher amount of both pheromone components than calling females. However, the summer temperature during field exposure influenced the release from mating disruption dispensers the following year. In the wind tunnel, male L. botrana were equally attracted to 12-month, field-exposed dispensers, a standard monitoring pheromone lure, and to synthetic (E)-7,(Z)-9-dodecadienyl acetate sprayed at the rate of 0.6 ‐ 60 ng h − 1 . Field trapping tests confirmed that aged dispensers from both years were at least as attractive to L. botrana males as a standard monitoring pheromone lure . The possible contribution of previously applied dispensers to the mating disruption efficacy during following applications is discussed.
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Antennal and behavioral responses of grapevine moth Lobesia botrana females to volatiles from grapevine.
Journal of chemical ecology, 2005Co-Authors: Marco Tasin, Claudio Ioriatti, Marie Bengtsson, Gianfranco Anfora, Silvia Carlin, Antonio De Cristofaro, Silvia Schmidt, Giuseppe Versini, Peter WitzgallAbstract:Grapevine moth Lobesia botrana is the economically most important insect of grapevine Vitis vinifera in Europe. Flower buds, flowers, and green berries of Chardonnay grapevine are known to attract L. botrana for oviposition. The volatile compounds collected from these phenological stages were studied by gas chromatography—mass spectrometry, and the antennal response of L. botrana females to these headspace collections was recorded by gas chromatography—electroantennography. The compounds found in all phenological stages, which consistently elicited a strong antennal response, were pentadecane, nonanal, and α -farnesene. In a wind tunnel, gravid L. botrana females flew upwind to green grapes, as well as to headspace collections from these berries released by a piezoelectric sprayer release device. However, no females landed at the source of headspace volatiles, possibly due to inappropriate concentrations or biased ratios of compounds in the headspace extracts.
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Attractiveness of year‐old polyethylene Isonet sex pheromone dispensers for Lobesia botrana
Entomologia Experimentalis et Applicata, 2005Co-Authors: Gianfranco Anfora, Peter Witzgall, Marco Tasin, Anna-carin Bäckman, Antonio De Cristofaro, Clvaudio IoriattiAbstract:In this study, we have compared the release of sex pheromone from mating disruption dispensers exposed in the field for 12 months and from calling females. The main pheromone component of the grapevine moth, Lobesia botrana (D. and S.) (Lepidoptera: Tortricidae), is (E)-7,(Z)-9-dodecadienyl acetate, and a minor component is (Z)-9-dodecenyl acetate. Aged dispensers from two different years emitted a much higher amount of both pheromone components than calling females. However, the summer temperature during field exposure influenced the release from mating disruption dispensers the following year. In the wind tunnel, male L. botrana were equally attracted to 12-month, field-exposed dispensers, a standard monitoring pheromone lure, and to synthetic (E)-7,(Z)-9-dodecadienyl acetate sprayed at the rate of 0.6 ‐ 60 ng h − 1 . Field trapping tests confirmed that aged dispensers from both years were at least as attractive to L. botrana males as a standard monitoring pheromone lure . The possible contribution of previously applied dispensers to the mating disruption efficacy during following applications is discussed.
Jérôme Moreau - One of the best experts on this subject based on the ideXlab platform.
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Direct benefits from choosing a virgin male in the European grapevine moth, Lobesia botrana.
Animal Behaviour, 2016Co-Authors: Karen Muller, Denis Thiery, Laura Arenas, Jérôme MoreauAbstract:In Lepidoptera, male investment in the ejaculate usually declines over consecutive matings, a depletion that could have profound consequences for female reproductive output. Since successive matings can affect the ability of males to provide phenotypic benefits, there may be strong selection for females to discriminate between males with different mating experience. The aim of our study was to determine whether monandrous females of the European grapevine moth, Lobesia botrana, are able to discriminate between males of different quality based on their mating experience in order to maximize direct benefits (by receiving large spermatophores from virgin males) and minimize mating costs (by avoiding low-quality nonvirgin males). Nonvirgin males produced spermatophores five times smaller than those of virgin males; consequently, mating with nonvirgin males significantly reduced female fecundity and increased their motivation to remate. In a mate preference experiment, we found that females were more likely to mate with virgin males and more frequently rejected nonvirgin mates. Moreover, nonvirgin males required more time to achieve mating than virgin males. Our results suggest that females are able to discriminate between males with different mating experience, and prefer virgin males, thereby maximizing direct benefits associated with receiving large spermatophores.
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Male larval nutrition affects adult reproductive success in wild European grapevine moth (Lobesia botrana)
Behavioral Ecology and Sociobiology, 2015Co-Authors: Karen Muller, Denis Thiery, Yannick Moret, Jérôme MoreauAbstract:In Lepidoptera, males transfer a spermatophore to females containing sperm and accessory gland secretions that are reinvested into female reproduction, providing a fitness gain to females. One of the key factors shaping male spermatophore size is certainly the resources that males have acquired as larvae. In this study, we investigate how male larval food contributes to shaping the spermatophore quantity and quality and how it affects female reproduction in the European grapevine moth ( Lobesia botrana ). Specifically, we examined the effect of male origin (cultivar or geographical site) on their mating success by scoring individual motivation to mate, male spermatophore size and amount of sperm, and finally female fecundity and fertility. A strong effect of larval cultivar was found on spermatophore size and amount of fertilizing sperm produced by males. These male characteristics had important repercussions on female reproductive output. Females mating with males producing the biggest spermatophore and more fertilizing sperm were the most fecund and fertile. Finally, females were able to recognize males of different quality during the precopulatory phase and changed their mating behavior accordingly. The present results suggest that male nutritional quality could have an important implication for population dynamics.
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Lobesia botrana larvae develop faster in the presence of parasitoids.
PloS one, 2013Co-Authors: Fanny Vogelweith, Denis Thiery, Yannick Moret, Jérôme MoreauAbstract:To combat parasitism hosts often rely on their immune system, which is the last line of defense. However, the immune system may not always be effective, and other non-immunological defenses might be favored to reduce the cost of parasite infection. Here we report that larvae of the moth Lobesia botrana can rapidly accelerate their development and reach maturity earlier in response to cues perceived at a distance from parasitoids. Such a phenotypically plastic life history shift, induced by the perception of deadly enemies in the environment, is likely to be an adaptive defensive strategy to prevent parasitoid attack, and has important implications in host–parasite dynamics.
Andrea Lucchi - One of the best experts on this subject based on the ideXlab platform.
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tachinid diptera tachinidae parasitoids of Lobesia botrana denis schiffermuller 1775 lepidoptera tortricidae and other moths
ZooKeys, 2020Co-Authors: Pier Luigi Scaramozzino, Augusto Loni, Andrea Lucchi, Filippo Di Giovanni, Silvia Gisondi, Pierfilippo CerrettiAbstract:The present paper reports data on the biology of eleven species of tachinid flies collected in Italy and Spain on different host plants and emerged from different host larvae. An annotated list of the eleven species emerged from the collected lepidopterans is provided; information about distribution and biology are given as well as the description of their puparia. Two new parasitoid species of the European Grapevine Moth (EGVM) Lobesia botrana were recorded: Clemelis massilia, whose host preferences were unknown so far, and Neoplectops pomonellae. A list of lepidopteran pest species with their associated plants and tachinid parasitoids is then given in order to highlight the relationships among the three components of the biocenosis (plant, herbivore and parasitoid). Eventually, due to the great economic importance of L. botrana in viticulture, a preliminary identification key to the puparia of its tachinid parasitoids is provided.
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Tachinid (Diptera, Tachinidae) parasitoids of Lobesia botrana (Denis & Schiffermüller, 1775) (Lepidoptera, Tortricidae) and other moths.
ZooKeys, 2020Co-Authors: Pier Luigi Scaramozzino, Augusto Loni, Andrea Lucchi, Filippo Di Giovanni, Silvia Gisondi, Pierfilippo CerrettiAbstract:The present paper reports data on the biology of eleven species of tachinid flies collected in Italy and Spain on different host plants and emerged from different host larvae. An annotated list of the eleven species emerged from the collected lepidopterans is provided; information about distribution and biology are given as well as the description of their puparia. Two new parasitoid species of the European Grapevine Moth (EGVM) Lobesia botrana were recorded: Clemelis massilia, whose host preferences were unknown so far, and Neoplectops pomonellae. A list of lepidopteran pest species with their associated plants and tachinid parasitoids is then given in order to highlight the relationships among the three components of the biocenosis (plant, herbivore and parasitoid). Eventually, due to the great economic importance of L. botrana in viticulture, a preliminary identification key to the puparia of its tachinid parasitoids is provided.
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A review of insect parasitoids associated with Lobesia botrana (Denis & Schiffermüller, 1775) in Italy. 1. Diptera Tachinidae and Hymenoptera Braconidae (Lepidoptera, Tortricidae)
ZooKeys, 2017Co-Authors: Pier Luigi Scaramozzino, Augusto Loni, Andrea LucchiAbstract:This paper is aimed to summarize the information available on the parasitoid complex of the European Grapevine Moth (EGVM), Lobesia botrana (Denis & Schiffermuller, 1775) (Lepidoptera Tortricidae) in Italy. The list is the result of the consultation of a vast bibliography published in Italy for almost two hundred years, from 1828 to date. This allowed the clarification and correction of misunderstandings and mistakes on the taxonomic position of each species listed. In Italy the complex of parasitoids detected on EGVM includes approximately 90 species belonging to ten families of Hymenoptera (Braconidae, Ichneumonidae, Chalcididae, Eulophidae, Eupelmidae, Eurytomidae, Pteromalidae, Torymidae, Trichogrammatidae, and Bethylidae) and one family of Diptera (Tachinidae). This paper deals with EGVM parasitoids of the families Tachinidae (Diptera) and Braconidae (Hymenoptera). Only two species of Tachinidae are associated to EGVM larvae in Italy, Actia pilipennis (Fallen) and Phytomyptera nigrina (Meigen), whereas the record of Eurysthaea scutellaris (Robineau-Desvoidy) is doubtful. Moreover, 21 species of Braconidae are reported to live on EGVM, but, unfortunately, eight of them were identified only at generic level. Bracon mellitor Say has been incorrectly listed among the parasitoids of Lobesia botrana. Records concerning Ascogaster rufidens Wesmael, Meteorus sp., Microgaster rufipes Nees, and Microplitis tuberculifer (Wesmael) are uncertain.
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a review of insect parasitoids associated with Lobesia botrana denis schiffermuller 1775 in italy 1 diptera tachinidae and hymenoptera braconidae lepidoptera tortricidae
ZooKeys, 2017Co-Authors: Pier Luigi Scaramozzino, Augusto Loni, Andrea LucchiAbstract:This paper is aimed to summarize the information available on the parasitoid complex of the European Grapevine Moth (EGVM), Lobesia botrana (Denis & Schiffermuller, 1775) (Lepidoptera Tortricidae) in Italy. The list is the result of the consultation of a vast bibliography published in Italy for almost two hundred years, from 1828 to date. This allowed the clarification and correction of misunderstandings and mistakes on the taxonomic position of each species listed. In Italy the complex of parasitoids detected on EGVM includes approximately 90 species belonging to ten families of Hymenoptera (Braconidae, Ichneumonidae, Chalcididae, Eulophidae, Eupelmidae, Eurytomidae, Pteromalidae, Torymidae, Trichogrammatidae, and Bethylidae) and one family of Diptera (Tachinidae). This paper deals with EGVM parasitoids of the families Tachinidae (Diptera) and Braconidae (Hymenoptera). Only two species of Tachinidae are associated to EGVM larvae in Italy, Actia pilipennis (Fallen) and Phytomyptera nigrina (Meigen), whereas the record of Eurysthaea scutellaris (Robineau-Desvoidy) is doubtful. Moreover, 21 species of Braconidae are reported to live on EGVM, but, unfortunately, eight of them were identified only at generic level. Bracon mellitor Say has been incorrectly listed among the parasitoids of Lobesia botrana. Records concerning Ascogaster rufidens Wesmael, Meteorus sp., Microgaster rufipes Nees, and Microplitis tuberculifer (Wesmael) are uncertain.
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Braconinae parasitoids (Hymenoptera, Braconidae) emerged from larvae of Lobesia botrana (Denis & Schiffermüller) (Lepidoptera, Tortricidae) feeding on Daphne gnidium L.
ZooKeys, 2016Co-Authors: Augusto Loni, Konstantin G. Samartsev, Pier Luigi Scaramozzino, Sergey A. Belokobylskij, Andrea LucchiAbstract:Bracon admotus Papp, 2000, and three species of the genus Habrobracon Ashmead, 1895, Habrobracon concolorans (Marshall, 1900), Habrobracon hebetor (Say, 1836) and Habrobracon pillerianae Fischer, 1980, were obtained from the larvae of Lobesia botrana (Denis & Schiffermuller, 1775) (Lepidoptera, Tortricidae) feeding on Daphne gnidium Linnaeus, 1753 (Thymelaeaceae) in the natural reserve of Migliarino-San Rossore-Massaciuccoli (Pisa-Central Italy). Bracon admotus, Habrobracon concolorans and Habrobracon pillerianae were found for the first time to be associated with Lobesia botrana, while Habrobracon hebetor was reared for the first time from the larvae of Cryptoblabes gnidiella (Milliere, 1867) (Lepidoptera, Pyralidae, Phycitinae) that was found on the same host plant. Bracon admotus and Habrobracon pillerianae are new to the fauna of Italy and Western Europe. A key is proposed for the determination of Habrobracon species reared from Lobesia botrana and related Palaearctic species of this genus. Habrobracon lineatellae Fisher, 1968 is considered as a valid species.
Marco Tasin - One of the best experts on this subject based on the ideXlab platform.
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Chemical Ecology and Management of Lobesia botrana (Lepidoptera: Tortricidae)
Journal of economic entomology, 2011Co-Authors: Claudio Ioriatti, Peter Witzgall, Marco Tasin, Gianfranco Anfora, A. De Cristofaro, Andrea LucchiAbstract:The moth Lobesia botrana (Denis & Schiffermuller) (Lepidoptera: Tortricidae) feeds on grapes (Vitis vinifera L.), reducing yield and increasing susceptibility to fungal infections. L. botrana is among the most economically important insects in Europe and has recently been found in vineyards in Chile, Argentina, and California. Here, we review L. botrana biology and behavior in relation to its larval host (the grapevine) and its natural enemies. We also discuss current and future control strategies in light of our knowledge of chemical ecology, with an emphasis on the use of the sex pheromone-based strategies as an environmentally safe management approach. Pheromone-mediated mating disruption is the most promising technique available on grapes and is currently implemented on ≈140,000 ha in Europe. Experience from several growing areas confirms the importance of collaboration between research, extension, growers, and pheromone-supply companies for the successful implementation of the mating disruption technique. In the vineyards where mating disruption has been successfully applied as an areawide strategy, the reduction in insecticide use has improved the quality of life for growers, consumers, as well as the public living near wine-growing areas and has thereby reduced the conflict between agricultural and urban communities.
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New Pheromone Components of the Grapevine Moth Lobesia botrana
Journal of Chemical Ecology, 2005Co-Authors: Peter Witzgall, Marco Tasin, Hans-ruedi Buser, Gertrud Wegner-kiß, Vicente S. Marco Mancebón, Claudio Ioriatti, Anna-carin Bäckman, Marie Bengtsson, Lutz Lehmann, Wittko FranckeAbstract:Analysis of extracts of sex pheromone glands of grapevine moth females Lobesia botrana showed three previously unidentified compounds, ( E )-7-dodecenyl acetate and the ( E , E )- and ( Z , E )-isomers of 7,9,11-dodecatrienyl acetate. This is the first account of a triply unsaturated pheromone component in a tortricid moth. The monoenic acetate ( E )-7-dodecenyl acetate and the trienic acetate (7 Z ,9 E ,11)-dodecatrienyl acetate significantly enhanced responses of males to the main pheromone compound, (7 E ,9 Z )-7,9-dodecadienyl acetate, in the wind tunnel. The identification of sex pheromone synergists in L. botrana may be of practical importance for the development of integrated pest management systems.
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attractiveness of year old polyethylene isonet sex pheromone dispensers for Lobesia botrana
Entomologia Experimentalis Et Applicata, 2005Co-Authors: G Anfora, Peter Witzgall, Marco Tasin, Anna-carin Bäckman, Antonio De Cristofaro, Clvaudio IoriattiAbstract:In this study, we have compared the release of sex pheromone from mating disruption dispensers exposed in the field for 12 months and from calling females. The main pheromone component of the grapevine moth, Lobesia botrana (D. and S.) (Lepidoptera: Tortricidae), is (E)-7,(Z)-9-dodecadienyl acetate, and a minor component is (Z)-9-dodecenyl acetate. Aged dispensers from two different years emitted a much higher amount of both pheromone components than calling females. However, the summer temperature during field exposure influenced the release from mating disruption dispensers the following year. In the wind tunnel, male L. botrana were equally attracted to 12-month, field-exposed dispensers, a standard monitoring pheromone lure, and to synthetic (E)-7,(Z)-9-dodecadienyl acetate sprayed at the rate of 0.6 ‐ 60 ng h − 1 . Field trapping tests confirmed that aged dispensers from both years were at least as attractive to L. botrana males as a standard monitoring pheromone lure . The possible contribution of previously applied dispensers to the mating disruption efficacy during following applications is discussed.
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Antennal and behavioral responses of grapevine moth Lobesia botrana females to volatiles from grapevine.
Journal of chemical ecology, 2005Co-Authors: Marco Tasin, Claudio Ioriatti, Marie Bengtsson, Gianfranco Anfora, Silvia Carlin, Antonio De Cristofaro, Silvia Schmidt, Giuseppe Versini, Peter WitzgallAbstract:Grapevine moth Lobesia botrana is the economically most important insect of grapevine Vitis vinifera in Europe. Flower buds, flowers, and green berries of Chardonnay grapevine are known to attract L. botrana for oviposition. The volatile compounds collected from these phenological stages were studied by gas chromatography—mass spectrometry, and the antennal response of L. botrana females to these headspace collections was recorded by gas chromatography—electroantennography. The compounds found in all phenological stages, which consistently elicited a strong antennal response, were pentadecane, nonanal, and α -farnesene. In a wind tunnel, gravid L. botrana females flew upwind to green grapes, as well as to headspace collections from these berries released by a piezoelectric sprayer release device. However, no females landed at the source of headspace volatiles, possibly due to inappropriate concentrations or biased ratios of compounds in the headspace extracts.
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Attractiveness of year‐old polyethylene Isonet sex pheromone dispensers for Lobesia botrana
Entomologia Experimentalis et Applicata, 2005Co-Authors: Gianfranco Anfora, Peter Witzgall, Marco Tasin, Anna-carin Bäckman, Antonio De Cristofaro, Clvaudio IoriattiAbstract:In this study, we have compared the release of sex pheromone from mating disruption dispensers exposed in the field for 12 months and from calling females. The main pheromone component of the grapevine moth, Lobesia botrana (D. and S.) (Lepidoptera: Tortricidae), is (E)-7,(Z)-9-dodecadienyl acetate, and a minor component is (Z)-9-dodecenyl acetate. Aged dispensers from two different years emitted a much higher amount of both pheromone components than calling females. However, the summer temperature during field exposure influenced the release from mating disruption dispensers the following year. In the wind tunnel, male L. botrana were equally attracted to 12-month, field-exposed dispensers, a standard monitoring pheromone lure, and to synthetic (E)-7,(Z)-9-dodecadienyl acetate sprayed at the rate of 0.6 ‐ 60 ng h − 1 . Field trapping tests confirmed that aged dispensers from both years were at least as attractive to L. botrana males as a standard monitoring pheromone lure . The possible contribution of previously applied dispensers to the mating disruption efficacy during following applications is discussed.