Aspects of field-balks for conservation and agriculture
1987
Welling, M. (Biologische Bundesanstalt fuer Land- und Forstwirtschaft, Darmstadt (Germany, F.R.). Inst. fuer Biologische Schaedlingsbekaempfung) | Kokta, C. | Bathon, H. | Klingauf, F. | Langenbruch, G.A.
Whereas botanical aspects of field-balks are rather well studied, entomological investigations are largely missing up to now. Well developed balks can act as bridges between isolated biotopes, can serve as a habitat of endangered animal and plant species and can guarantee the nutrition of various beneficial insects. The diversity of species is increasing with the width of the balks. In balks of more than 2-3 m an extensive insect life can be found. Wide balks with many flowers attract syrphids, the larvae of which can be important aphid-antagonists. Possible positive and negativ1731e effects of balks on the cultivated fields are discu
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