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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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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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 |
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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 |
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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 |
work_keys_str_mv |
AT jaworskicolinec apparentcompetitionbetweenmajorpestsreducespestpopulationdensitiesontomatocropbutnotyieldloss AT chailleuxanais apparentcompetitionbetweenmajorpestsreducespestpopulationdensitiesontomatocropbutnotyieldloss AT bearezphilippe apparentcompetitionbetweenmajorpestsreducespestpopulationdensitiesontomatocropbutnotyieldloss AT desneuxnicolas apparentcompetitionbetweenmajorpestsreducespestpopulationdensitiesontomatocropbutnotyieldloss |
_version_ |
1792498918647398400 |