Insecticides promote viral outbreaks by altering herbivore competition

Huipeng Pan, Evan L. Preisser, Dong Chu, Shaoli Wang, Qingjun Wu, Yves Carrière, Xuguo Zhou, Youjun Zhang

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

While the management of biological invasions is often characterized by a series of single-species decisions, invasive species exist within larger food webs. These biotic interactions can alter the impact of control/eradication programs and may cause suppression efforts to inadvertently facilitate invasion spread and impact. We document the rapid replacement of the invasive Bemisia Middle East-Asia Minor I (MEAM1) cryptic biotype by the cryptic Mediterranean (MED) biotype throughout China and demonstrate that MED is more tolerant of insecticides and a better vector of tomato yellow leaf curl virus (TYLCV) than MEAM1. While MEAM1 usually excludes MED under natural conditions, insecticide application reverses the MEAM1-MED competitive hierarchy and allows MED to exclude MEAM1. The insecticide-mediated success of MED has led to TYLCV outbreaks throughout China. Our work strongly supports the hypothesis that insecticide use in China reverses the MEAM1-MED competitive hierarchy and allows MED to displace MEAM1 in managed landscapes. By promoting the dominance of a Bemisia species that is a competent viral vector, insecticides thus increase the spread and impact of TYLCV in heterogeneous agroecosystems.

Original languageEnglish (US)
Pages (from-to)1585-1595
Number of pages11
JournalEcological Applications
Volume25
Issue number6
DOIs
StatePublished - Sep 1 2015

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Keywords

  • Agriculture
  • Bemisia tabaci
  • Biological invasions
  • Competitive displacement
  • Insecticides
  • Mediterranean (MED)
  • Middle East-Asia Minor I (MEAM1)
  • Plant virus
  • Tomato yellow leaf curl virus (TYLCV)

ASJC Scopus subject areas

  • Ecology

Cite this

Pan, H., Preisser, E. L., Chu, D., Wang, S., Wu, Q., Carrière, Y., Zhou, X., & Zhang, Y. (2015). Insecticides promote viral outbreaks by altering herbivore competition. Ecological Applications, 25(6), 1585-1595. https://doi.org/10.1890/14-0752.1