Effects of local and landscape factors on population dynamics of a cotton pest

Yves Carriere, Peter B. Goodell, Christa Ellers-Kirk, Guillaume Larocque, Pierre Dutilleul, Steven E. Naranjo, Peter C Ellsworth

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Background: Many polyphagous pests sequentially use crops and uncultivated habitats in landscapes dominated by annual crops. As these habitats may contribute in increasing or decreasing pest density in fields of a specific crop, understanding the scale and temporal variability of source and sink effects is critical for managing landscapes to enhance pest control. Methodology/Principal Findings: We evaluated how local and landscape characteristics affect population density of the western tarnished plant bug, Lygus hesperus (Knight), in cotton fields of the San Joaquin Valley in California. During two periods covering the main window of cotton vulnerability to Lygus attack over three years, we examined the associations between abundance of six common Lygus crops, uncultivated habitats and Lygus population density in these cotton fields. We also investigated impacts of insecticide applications in cotton fields and cotton flowering date. Consistent associations observed across periods and years involved abundances of cotton and uncultivated habitats that were negatively associated with Lygus density, and abundance of seed alfalfa and cotton flowering date that were positively associated with Lygus density. Safflower and forage alfalfa had variable effects, possibly reflecting among-year variation in crop management practices, and tomato, sugar beet and insecticide applications were rarely associated with Lygus density. Using data from the first two years, a multiple regression model including the four consistent factors successfully predicted Lygus density across cotton fields in the last year of the study. Conclusions/Significance: Our results show that the approach developed here is appropriate to characterize and test the source and sink effects of various habitats on pest dynamics and improve the design of landscape-level pest management strategies.

Original languageEnglish (US)
Article numbere39862
JournalPLoS One
Volume7
Issue number6
DOIs
StatePublished - Jun 29 2012

Fingerprint

Population dynamics
Lygus
Population Dynamics
Cotton
Ecosystem
population dynamics
cotton
pests
Crops
Pest Control
Medicago sativa
Insecticides
Population Density
Lygus hesperus
habitats
Carthamus tinctorius
crops
Beta vulgaris
pesticide application
Practice Management

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Effects of local and landscape factors on population dynamics of a cotton pest. / Carriere, Yves; Goodell, Peter B.; Ellers-Kirk, Christa; Larocque, Guillaume; Dutilleul, Pierre; Naranjo, Steven E.; Ellsworth, Peter C.

In: PLoS One, Vol. 7, No. 6, e39862, 29.06.2012.

Research output: Contribution to journalArticle

Carriere, Y, Goodell, PB, Ellers-Kirk, C, Larocque, G, Dutilleul, P, Naranjo, SE & Ellsworth, PC 2012, 'Effects of local and landscape factors on population dynamics of a cotton pest', PLoS One, vol. 7, no. 6, e39862. https://doi.org/10.1371/journal.pone.0039862
Carriere Y, Goodell PB, Ellers-Kirk C, Larocque G, Dutilleul P, Naranjo SE et al. Effects of local and landscape factors on population dynamics of a cotton pest. PLoS One. 2012 Jun 29;7(6). e39862. https://doi.org/10.1371/journal.pone.0039862
Carriere, Yves ; Goodell, Peter B. ; Ellers-Kirk, Christa ; Larocque, Guillaume ; Dutilleul, Pierre ; Naranjo, Steven E. ; Ellsworth, Peter C. / Effects of local and landscape factors on population dynamics of a cotton pest. In: PLoS One. 2012 ; Vol. 7, No. 6.
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