Fig 1.

Average daily emigration and immigration of (a) total aphidophagous predators, (b) aphidophagous hover flies, and (c) aphidophagous green lacewings between soybean and different adjacent habitats, combining two years of sampling (7 weeks in total). Sampling consisted of bi-directional Malaise traps established on five adjacent habitats: soybean-alfalfa (n = 24 bottles), soybean-canola (n = 25), soybean-grass (n = 7), soybean-woodland (n = 39), soybean-wheat (n = 11) and control (soybean fields, 100 m from the field border, n = 32). Significant differences (p < 0.05) between emigration and immigration (or captures towards the field interior and field margin in controls) are indicated with *, and for emigration levels among field borders with different lower case letters; no significant differences were observed in immigration levels. ¹ Control bi-directional Malaise traps were established in a subset of fields in 2014 (n = 8 fields).