Hedges. III. The Effect of Removal of the Bottom Flora of a Hawthorn Hedgerow on the Carabidae of the Hedge Bottom
Journal of Applied Ecology Vol. 5, No. 1 (Apr., 1968), pp. 125-139
The experimental work described in this paper was carried out on a hedgerow on the Ashton Wold Estate in Northamptonshire (Grid Ref. TL 065880). The site and the experimental layout have been described in a previous paper (Pollard 1968) and will only be briefly outlined here. Bottom flora was removed from the experimental hawthorn hedgerow to simulate the effect of spray drift into the hedge bottom. Treatments: A, bottom flora removed; B, bottom flora retained. Complete, rather than selective removal was preferred to give a more clear-cut experiment, although one less closely related to agricultural conditions. The herbicide 'Preeglone' was used to achieve this complete kill. The effect of this treatment on the hawthorn fauna, and in particular on a group of predacious Heteroptera, have already been described (Pollard 1968). The Carabidae, considered in this paper, are a widespread family, the majority of which are ground-living predators. Some have been shown to be predators of crop pests (Mitchell 1963a, b; Coaker & Williams 1963; Dempster 1967).
Author(s): E. Pollard
Journal: Journal of Applied Ecology Vol. 5, No. 1 (Apr., 1968), pp. 125-139