Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss

Increased pest control by generalist predators has been successfully achieved in several cases by promoting apparent competition, which is the reciprocal negative interactions between prey mediated by their shared predator. However, the presence of alternative prey does not always result in an improved control of the target pest species, due to the complexity and specificity of biotic interactions. To increase the effectiveness of IPM programs, a fine understanding of the interactions among co-occurring pest species and their biocontrol agents is necessary. We tested the occurrence of apparent competition between the major tomato pests Tuta absoluta and Bemisia tabaci when preyed on by a generalist mirid bug Macrolophus pygmaeus, by monitoring pest and predator population dynamics in a greenhouse experiment. We also measured the cascading effect of the shared predator on plant and fruit damage due to pests. We observed higher predator population growth and reduced population densities of both prey in treatments with two prey, as compared to treatments with one prey, showing that apparent competition occurred. Plant and fruit damage caused by B. tabaci was reduced in the presence of T. absoluta, but damage due to T. absoluta, which accounted for the major part, was not reduced in the presence of B. tabaci, resulting in similar levels of total damage when pests co-occurred. This study demonstrates that, even if promoting apparent competition leads to actual reduction in pest densities, yield loss may not be reduced when this strategy is applied to major pests such as T. absoluta.

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Bibliographic Details
Main Authors: Jaworski, Coline C., Chailleux, Anaïs, Bearez, Philippe, Desneux, Nicolas
Format: article biblioteca
Language:eng
Subjects:H10 - Ravageurs des plantes, L20 - Écologie animale, Solanum lycopersicum, ravageur des plantes, interactions biologiques, Bemisia tabaci, Macrolophus, agroécosystème, compétition biologique, dynamique des populations, perte de récolte, évaluation de l'impact, Tuta absoluta, http://aims.fao.org/aos/agrovoc/c_4475, http://aims.fao.org/aos/agrovoc/c_16196, http://aims.fao.org/aos/agrovoc/c_49896, http://aims.fao.org/aos/agrovoc/c_30755, http://aims.fao.org/aos/agrovoc/c_37776, http://aims.fao.org/aos/agrovoc/c_36669, http://aims.fao.org/aos/agrovoc/c_917, http://aims.fao.org/aos/agrovoc/c_6111, http://aims.fao.org/aos/agrovoc/c_1969, http://aims.fao.org/aos/agrovoc/c_37938, http://aims.fao.org/aos/agrovoc/c_e844dfc3,
Online Access:http://agritrop.cirad.fr/577994/
http://agritrop.cirad.fr/577994/1/577994.pdf
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spelling dig-cirad-fr-5779942024-01-28T23:01:01Z http://agritrop.cirad.fr/577994/ http://agritrop.cirad.fr/577994/ Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss. Jaworski Coline C., Chailleux Anaïs, Bearez Philippe, Desneux Nicolas. 2015. Journal of Pest Science, 88 (4) : 793-803.https://doi.org/10.1007/s10340-015-0698-3 <https://doi.org/10.1007/s10340-015-0698-3> Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss Jaworski, Coline C. Chailleux, Anaïs Bearez, Philippe Desneux, Nicolas eng 2015 Journal of Pest Science H10 - Ravageurs des plantes L20 - Écologie animale Solanum lycopersicum ravageur des plantes interactions biologiques Bemisia tabaci Macrolophus agroécosystème compétition biologique dynamique des populations perte de récolte évaluation de l'impact Tuta absoluta http://aims.fao.org/aos/agrovoc/c_4475 http://aims.fao.org/aos/agrovoc/c_16196 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_30755 http://aims.fao.org/aos/agrovoc/c_37776 http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_917 http://aims.fao.org/aos/agrovoc/c_6111 http://aims.fao.org/aos/agrovoc/c_1969 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_e844dfc3 Increased pest control by generalist predators has been successfully achieved in several cases by promoting apparent competition, which is the reciprocal negative interactions between prey mediated by their shared predator. However, the presence of alternative prey does not always result in an improved control of the target pest species, due to the complexity and specificity of biotic interactions. To increase the effectiveness of IPM programs, a fine understanding of the interactions among co-occurring pest species and their biocontrol agents is necessary. We tested the occurrence of apparent competition between the major tomato pests Tuta absoluta and Bemisia tabaci when preyed on by a generalist mirid bug Macrolophus pygmaeus, by monitoring pest and predator population dynamics in a greenhouse experiment. We also measured the cascading effect of the shared predator on plant and fruit damage due to pests. We observed higher predator population growth and reduced population densities of both prey in treatments with two prey, as compared to treatments with one prey, showing that apparent competition occurred. Plant and fruit damage caused by B. tabaci was reduced in the presence of T. absoluta, but damage due to T. absoluta, which accounted for the major part, was not reduced in the presence of B. tabaci, resulting in similar levels of total damage when pests co-occurred. This study demonstrates that, even if promoting apparent competition leads to actual reduction in pest densities, yield loss may not be reduced when this strategy is applied to major pests such as T. absoluta. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/577994/1/577994.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1007/s10340-015-0698-3 10.1007/s10340-015-0698-3 info:eu-repo/semantics/altIdentifier/doi/10.1007/s10340-015-0698-3 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1007/s10340-015-0698-3
institution CIRAD FR
collection DSpace
country Francia
countrycode FR
component Bibliográfico
access En linea
databasecode dig-cirad-fr
tag biblioteca
region Europa del Oeste
libraryname Biblioteca del CIRAD Francia
language eng
topic H10 - Ravageurs des plantes
L20 - Écologie animale
Solanum lycopersicum
ravageur des plantes
interactions biologiques
Bemisia tabaci
Macrolophus
agroécosystème
compétition biologique
dynamique des populations
perte de récolte
évaluation de l'impact
Tuta absoluta
http://aims.fao.org/aos/agrovoc/c_4475
http://aims.fao.org/aos/agrovoc/c_16196
http://aims.fao.org/aos/agrovoc/c_49896
http://aims.fao.org/aos/agrovoc/c_30755
http://aims.fao.org/aos/agrovoc/c_37776
http://aims.fao.org/aos/agrovoc/c_36669
http://aims.fao.org/aos/agrovoc/c_917
http://aims.fao.org/aos/agrovoc/c_6111
http://aims.fao.org/aos/agrovoc/c_1969
http://aims.fao.org/aos/agrovoc/c_37938
http://aims.fao.org/aos/agrovoc/c_e844dfc3
H10 - Ravageurs des plantes
L20 - Écologie animale
Solanum lycopersicum
ravageur des plantes
interactions biologiques
Bemisia tabaci
Macrolophus
agroécosystème
compétition biologique
dynamique des populations
perte de récolte
évaluation de l'impact
Tuta absoluta
http://aims.fao.org/aos/agrovoc/c_4475
http://aims.fao.org/aos/agrovoc/c_16196
http://aims.fao.org/aos/agrovoc/c_49896
http://aims.fao.org/aos/agrovoc/c_30755
http://aims.fao.org/aos/agrovoc/c_37776
http://aims.fao.org/aos/agrovoc/c_36669
http://aims.fao.org/aos/agrovoc/c_917
http://aims.fao.org/aos/agrovoc/c_6111
http://aims.fao.org/aos/agrovoc/c_1969
http://aims.fao.org/aos/agrovoc/c_37938
http://aims.fao.org/aos/agrovoc/c_e844dfc3
spellingShingle H10 - Ravageurs des plantes
L20 - Écologie animale
Solanum lycopersicum
ravageur des plantes
interactions biologiques
Bemisia tabaci
Macrolophus
agroécosystème
compétition biologique
dynamique des populations
perte de récolte
évaluation de l'impact
Tuta absoluta
http://aims.fao.org/aos/agrovoc/c_4475
http://aims.fao.org/aos/agrovoc/c_16196
http://aims.fao.org/aos/agrovoc/c_49896
http://aims.fao.org/aos/agrovoc/c_30755
http://aims.fao.org/aos/agrovoc/c_37776
http://aims.fao.org/aos/agrovoc/c_36669
http://aims.fao.org/aos/agrovoc/c_917
http://aims.fao.org/aos/agrovoc/c_6111
http://aims.fao.org/aos/agrovoc/c_1969
http://aims.fao.org/aos/agrovoc/c_37938
http://aims.fao.org/aos/agrovoc/c_e844dfc3
H10 - Ravageurs des plantes
L20 - Écologie animale
Solanum lycopersicum
ravageur des plantes
interactions biologiques
Bemisia tabaci
Macrolophus
agroécosystème
compétition biologique
dynamique des populations
perte de récolte
évaluation de l'impact
Tuta absoluta
http://aims.fao.org/aos/agrovoc/c_4475
http://aims.fao.org/aos/agrovoc/c_16196
http://aims.fao.org/aos/agrovoc/c_49896
http://aims.fao.org/aos/agrovoc/c_30755
http://aims.fao.org/aos/agrovoc/c_37776
http://aims.fao.org/aos/agrovoc/c_36669
http://aims.fao.org/aos/agrovoc/c_917
http://aims.fao.org/aos/agrovoc/c_6111
http://aims.fao.org/aos/agrovoc/c_1969
http://aims.fao.org/aos/agrovoc/c_37938
http://aims.fao.org/aos/agrovoc/c_e844dfc3
Jaworski, Coline C.
Chailleux, Anaïs
Bearez, Philippe
Desneux, Nicolas
Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
description Increased pest control by generalist predators has been successfully achieved in several cases by promoting apparent competition, which is the reciprocal negative interactions between prey mediated by their shared predator. However, the presence of alternative prey does not always result in an improved control of the target pest species, due to the complexity and specificity of biotic interactions. To increase the effectiveness of IPM programs, a fine understanding of the interactions among co-occurring pest species and their biocontrol agents is necessary. We tested the occurrence of apparent competition between the major tomato pests Tuta absoluta and Bemisia tabaci when preyed on by a generalist mirid bug Macrolophus pygmaeus, by monitoring pest and predator population dynamics in a greenhouse experiment. We also measured the cascading effect of the shared predator on plant and fruit damage due to pests. We observed higher predator population growth and reduced population densities of both prey in treatments with two prey, as compared to treatments with one prey, showing that apparent competition occurred. Plant and fruit damage caused by B. tabaci was reduced in the presence of T. absoluta, but damage due to T. absoluta, which accounted for the major part, was not reduced in the presence of B. tabaci, resulting in similar levels of total damage when pests co-occurred. This study demonstrates that, even if promoting apparent competition leads to actual reduction in pest densities, yield loss may not be reduced when this strategy is applied to major pests such as T. absoluta.
format article
topic_facet H10 - Ravageurs des plantes
L20 - Écologie animale
Solanum lycopersicum
ravageur des plantes
interactions biologiques
Bemisia tabaci
Macrolophus
agroécosystème
compétition biologique
dynamique des populations
perte de récolte
évaluation de l'impact
Tuta absoluta
http://aims.fao.org/aos/agrovoc/c_4475
http://aims.fao.org/aos/agrovoc/c_16196
http://aims.fao.org/aos/agrovoc/c_49896
http://aims.fao.org/aos/agrovoc/c_30755
http://aims.fao.org/aos/agrovoc/c_37776
http://aims.fao.org/aos/agrovoc/c_36669
http://aims.fao.org/aos/agrovoc/c_917
http://aims.fao.org/aos/agrovoc/c_6111
http://aims.fao.org/aos/agrovoc/c_1969
http://aims.fao.org/aos/agrovoc/c_37938
http://aims.fao.org/aos/agrovoc/c_e844dfc3
author Jaworski, Coline C.
Chailleux, Anaïs
Bearez, Philippe
Desneux, Nicolas
author_facet Jaworski, Coline C.
Chailleux, Anaïs
Bearez, Philippe
Desneux, Nicolas
author_sort Jaworski, Coline C.
title Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
title_short Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
title_full Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
title_fullStr Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
title_full_unstemmed Apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
title_sort apparent competition between major pests reduces pest population densities on tomato crop, but not yield loss
url http://agritrop.cirad.fr/577994/
http://agritrop.cirad.fr/577994/1/577994.pdf
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AT bearezphilippe apparentcompetitionbetweenmajorpestsreducespestpopulationdensitiesontomatocropbutnotyieldloss
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