Journal article

Publication year: 1991

Pages: 371-377

Journal: Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz = Journal of plant diseases and protection

Volume number: 98

Issue number: 4

ISSN: 0340-8159

Publisher: Ulmer

Abstract: 

Density and biomass of epigeal predators were studied in fields of winter wheat in different rotations and with extremely different intensity of insecticide use, in Hesse and Schleswig-Holstein.

Numbers of Trechus quadristriatus (Schrk.) (Col., Carabidae) increased with increasing use of insecticides, and with prolonged periods of undisturbed soil.

On the other hand, total numbers of all predators per m2 were lowest (13,2) at the highest intensity and highest (26,9) in organic farming with red clover as pre-crop. At high intensity of agriculture, biomass (mg/m2) was lowest in Hesse and in Schleswig-Holstein (with 19,5 resp. 18,6 mg). Again, organic farming with red clover as pre-crop yielded the highest biomass (54,6 mg/m2).

Insecticides, crop rotation and size of fields/field margins proved to be the main factors influencing numbers of epigeal predators.

Harvard Citation style: BASEDOW, T. (1991) POPULATION-DENSITY AND BIOMASS OF EPIGEAL PREDATORY ARTHROPODS, NATURAL ENEMIES OF INSECT PESTS, IN WINTER-WHEAT FIELDS OF AREAS WITH EXTREMELY DIFFERENT INTENSITY OF AGRICULTURAL PRODUCTION, Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz = Journal of plant diseases and protection, 98(4), pp. 371-377

APA Citation style: BASEDOW, T. (1991). POPULATION-DENSITY AND BIOMASS OF EPIGEAL PREDATORY ARTHROPODS, NATURAL ENEMIES OF INSECT PESTS, IN WINTER-WHEAT FIELDS OF AREAS WITH EXTREMELY DIFFERENT INTENSITY OF AGRICULTURAL PRODUCTION. Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz = Journal of plant diseases and protection. 98(4), 371-377.