Spillover of tachinids and hoverflies from different field margins

摘要: Abstract The introduction and conservation of field margins have been proposed as an intervention to counteract the decline in farmland biodiversity. However, how these can affect movement species individuals (i.e. spillover) natural enemies between crop is still unclear. In this work, we investigated spillover two different groups enemies: tachinids (Diptera: Tachinidae) aphidophagous hoverflies Syrphidae). For comparison also response non-aphidophagous hoverflies. We examined from types margin (grass vs. hedgerow + grass margin) adjacent maize fields located landscapes with proportion arable land. was affected by margins, but varied insect groups. higher grass than hedgerows, suggesting that group may be related low contrast vegetation structure crop. tachinids, abundance toward center field, independently type margin. not These were only landscape composition their richness amounts Measures focusing on creation management need consider local crops relation life-history traits taxa.