Larval interactions between two aphidophagous coccinellids in sweet pepper

Antagonistic interactions among predators have the potential to dampen top-down impacts on a shared pest. Strong cannibalism by adults and larvae on eggs along with a stronger intraguild predation by Eriopis connexa on Cycloneda sanguinea (Coccinellidae) than vice versa had been documented. The inte...

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Detalles Bibliográficos
Autores principales: Rocca, Margarita, Rizzo, María Estefanía, Greco, Nancy Mabel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Naturales
Cannibalism
Intraguild predation
Larval behaviour
Cycloneda sanguinea
Eriopis connexa
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123992
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123992
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Cannibalism
Intraguild predation
Larval behaviour
Cycloneda sanguinea
Eriopis connexa
spellingShingle Ciencias Naturales
Cannibalism
Intraguild predation
Larval behaviour
Cycloneda sanguinea
Eriopis connexa
Rocca, Margarita
Rizzo, María Estefanía
Greco, Nancy Mabel
Larval interactions between two aphidophagous coccinellids in sweet pepper
topic_facet Ciencias Naturales
Cannibalism
Intraguild predation
Larval behaviour
Cycloneda sanguinea
Eriopis connexa
description Antagonistic interactions among predators have the potential to dampen top-down impacts on a shared pest. Strong cannibalism by adults and larvae on eggs along with a stronger intraguild predation by Eriopis connexa on Cycloneda sanguinea (Coccinellidae) than vice versa had been documented. The intensity and direction of these interactions could vary with the larval instar. We calculated aggressiveness, attack, and predation rates between larvae in the laboratory and studied both larval mortality and within-plant distribution in plants. Despite high attack rates, larvae of both species usually escaped from predation, except for the fourth vs. second-instar combinations, where the smaller larvae were more vulnerable to predation than the larger. Successful predation by E. connexa fourth-instars on C. sanguinea second-instars frequently occurred. All interactions between larvae became relaxed when extraguild prey were present. The larval mortality within the plants was influenced by the availability of extraguild prey only. Larvae of both species promptly dispersed outside the plant when prey became unavailable. With the extraguild prey present, the larvae of both species initially preferred the plant upper stratum in both combinations, but then dispersed. This study suggests that the defensive capability and larval dispersal could prevent cannibalism and intraguild-predation interactions.
format Articulo
Articulo
author Rocca, Margarita
Rizzo, María Estefanía
Greco, Nancy Mabel
author_facet Rocca, Margarita
Rizzo, María Estefanía
Greco, Nancy Mabel
author_sort Rocca, Margarita
title Larval interactions between two aphidophagous coccinellids in sweet pepper
title_short Larval interactions between two aphidophagous coccinellids in sweet pepper
title_full Larval interactions between two aphidophagous coccinellids in sweet pepper
title_fullStr Larval interactions between two aphidophagous coccinellids in sweet pepper
title_full_unstemmed Larval interactions between two aphidophagous coccinellids in sweet pepper
title_sort larval interactions between two aphidophagous coccinellids in sweet pepper
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/123992
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AT rizzomariaestefania larvalinteractionsbetweentwoaphidophagouscoccinellidsinsweetpepper
AT greconancymabel larvalinteractionsbetweentwoaphidophagouscoccinellidsinsweetpepper
bdutipo_str Repositorios
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