Landscape heterogeneity and farming practice influence biological control

Sammanfattning

We measured the impact of natural enemies on the population development on the bird cherry-oat aphid (Rhopalosiphum padi) on conventional and organic farms, By pairing farms with similar landscape features but different farming systems, we were able to separate the effects of farming practice and landscape features on the influence of natural enemies on R. padi abundance. Natural enemies had a greater impact on R. padi establishment on organic farms than on conventional farms. Irrespective of farming system, landscapes with abundant field margins and perennial crops were associated with low R. padi establishment. After establishment, there was no difference in ground-living enemy impact on R. padi population growth rate between farming systems, but impact was greater in landscapes where arable land was contiguous.

Nyckelord

agriculture; aphid-days; conservation predator enhancement; ecosystem service; predator-aphid interaction

Publicerad i

Basic and Applied Ecology
2001, volym: 2, nummer: 4, sidor: 365-371
Utgivare: URBAN & FISCHER VERLAG

SLU författare

• Östman, Örjan

  • Institutionen för ekologi och växtproduktionslära, Sveriges lantbruksuniversitet
    

• Ekbom, Barbara

  • Institutionen för entomologi, Sveriges lantbruksuniversitet
    

• Bengtsson, Jan

  • Institutionen för ekologi och växtproduktionslära, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Miljö- och naturvårdsvetenskap
Ekologi

Publikationens identifierare

• DOI: https://doi.org/10.1078/1439-1791-00072

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/80315