Crop Rotation and Integrated Control of Animal Pests1

That crop rotation may be a valuable means of reducing pest populations has been shown in field-grown rape. On an isolated area of about 800 ha, preliminary observations showed the beneficial effects in containing Dasyneura brassicae Winn. populations by substituting spring rape by winter rape. It appeared to be more difficult to control Meligethes aeneus F. and Ceuthorrhynchus assimilis Payk. through crop rotation but, with an improved trapping system and surveying of populations, the prospects are encouraging. Possibilities of combining crop rotation with integrated control are also examined.