Individual study: Floren und Faunenentwicklung auf herbizidfrei gehaltenen Agrarflachen. Auswirkungen des Ackerrandstreifenprogramms
Raskin R., Gluck E. & Pflug W. (1992) Floren und Faunenentwicklung auf herbizidfrei gehaltenen Agrarflachen. Auswirkungen des Ackerrandstreifenprogramms. Natur und Landschaft, 67, 7-14
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Leave headlands in fields unsprayed (conservation headlands)
A replicated, controlled study in summer 1988 in four headlands, adjacent arable fields and field margins in western Germany (Raskin et al. 1992) found that vascular plants, hoverflies (Syrphidae) and ground beetles (Carabidae) all benefited from extensive management in unsprayed headlands. Species richness of all three taxa, as well as abundance and diversity of hoverflies and ground beetles and vegetation cover were higher in the unsprayed margins than in the adjacent fields and the conventional control edge. Field margins adjacent to conservation headlands also held higher numbers of plant, hoverfly and ground beetle species than the margins next to the control edge. Three unsprayed headlands (up to seven years old) and one conventional field edge were compared to three adjacent conventional cereal fields and four field margins next to the headlands. Plants were surveyed in May to September. Ground beetles were sampled weekly from April to August in six pitfall traps (9.5 cm diameter) on each site. Hoverflies were monitored between May and August. Visual observations were made along a 100 m transect in each site. In addition, six yellow bowls (23 x 16 x 5 cm) were placed in the field margins and one in the field centre.