Enhancement of non-target insects: Indications about dimensions of unsprayed crop edges

Research output: Chapter in book/volumeContribution to conference proceedingsScientific


In the Haarlemmermeer field margin project, 3 m x 100 m and 6 m x 450 m strips along the edge of a cereal crop were left unsprayed with herbicides and insecticides. By comparing these two types of unsprayed edges, an indication can be obtained of the dimensions of unsprayed crop edges required for enhancing the natural values of arable farmland. This study considers the non-target insects on the vegetation, including butterflies, hoverflies and ladybirds. Because of its intermediate role, the vegetation was also investigated. The results show that the abundance and presence of farmland plants is greatest in the outer 3 metres of the field and that there is no significant difference between a 3-metre wide edge and the outer 3 metres of a 6-metre wide edge. There is no extra increase in the density of insects and a number of selected insect groups in the 6-metre wide unsprayed edges compared with the 3-metre wide edges. Although the experimental set-up was limited in scope, it therefore appears that for these insect groups it is sufficient to leave a relatively narrow strip unsprayed.
Original languageEnglish
Title of host publicationArthropod Natural Enemies in Arable Land. 2 Survival, Reproduction and Enhancement
Subtitle of host publicationEU Workshop on Enhancement, Dispersal, and Population Dynamics of Beneficial Insects in Integrated Agroecosystems
EditorsK. Booij, L. denNijs
Place of PublicationAarhus
PublisherAarhus Univ Press
Number of pages11
ISBN (Print)87-7288-672-2
Publication statusPublished - 1996
Externally publishedYes

Publication series

NameActa Jutlandica


  • insecticides herbicides butterflies hoverflies ladybirds


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