Asymmetric effects of a leaf-chewing herbivore on aphid population growth

Elizabeth Davidson-Lowe, Zsofia Szendrei, Jared Gregory Ali

Research output: Contribution to journalArticle

Abstract

1. Plant responses to herbivory are often specific to the feeding guild of the attacking herbivore. These phytochemical responses to herbivore damage can affect herbivore performance and activity. Comprehensive studies on the ecological consequences of multi-herbivore plant interactions are key to understanding plant–herbivore community dynamics. 2. This study examined how feeding damage by co-occurring herbivores from separate feeding guilds, Myzus persicae (Sulzer), a sucking herbivore, and Leptinotarsa decemlineata (Say), a chewing herbivore, alter plant chemistry and indirectly affect herbivore performance. Performance was measured when each insect fed on plants individually, sequentially, or simultaneously in laboratory and field experiments. Phytohormone and glycoalkaloid content were measured for each feeding sequence to evaluate plant responses to herbivory by each guild. Mid-season and end-of-season tuber yield were evaluated in the field study. 3. Damage by L. decemlineata negatively impacted M. persicae performance in both laboratory and field settings. Damage by M. persicae did not affect L. decemlineata performance in laboratory assays. However, L. decemlineata performance was positively affected by M. persicae herbivory in the field, but this effect was temporary. Although phytohormones and plant defences varied across treatments, they provide little resolution on interaction outcomes. 4. These results confirm that the presence of multiple feeding guilds on a single plant can affect these chewing and sucking herbivores differentially, but given the variability in our phytochemical analyses compared with other studies, the mechanism remains unclear. The study's findings show that aphids are negatively affected by chewing herbivores across systems, while aphids temporarily affected beetles positively.

Original languageEnglish (US)
Pages (from-to)81-92
Number of pages12
JournalEcological Entomology
Volume44
Issue number1
DOIs
StatePublished - Feb 1 2019

Fingerprint

mastication
aphid
Aphidoidea
herbivore
population growth
herbivores
guild
leaves
Leptinotarsa decemlineata
Myzus persicae
herbivory
damage
phytochemistry
plant-herbivore interaction
effect
plant hormones
phytopharmaceuticals
plant response
plant defense
community dynamics

All Science Journal Classification (ASJC) codes

  • Ecology
  • Insect Science

Cite this

Davidson-Lowe, Elizabeth ; Szendrei, Zsofia ; Ali, Jared Gregory. / Asymmetric effects of a leaf-chewing herbivore on aphid population growth. In: Ecological Entomology. 2019 ; Vol. 44, No. 1. pp. 81-92.
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Asymmetric effects of a leaf-chewing herbivore on aphid population growth. / Davidson-Lowe, Elizabeth; Szendrei, Zsofia; Ali, Jared Gregory.

In: Ecological Entomology, Vol. 44, No. 1, 01.02.2019, p. 81-92.

Research output: Contribution to journalArticle

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