Introduction
The number of growers applying integrated crop protection in roses is steadily increasing. Spider mite control is generally taken care of effectively with the aid of the predatory mites Phytoseiulus persimilis, Amblyseius californicus and the gall-midge Feltiella acarisuga. Problem areas in integrated pest control include whitefly and thrips. Damage by whitefly in particular is steadily increasing. The predatory mite Amblyseius cucumeris and the parasitic wasps Encarsia formosa and Eretmocerus eremicus could certainly use a little extra help in this regard. In addition to the abovementioned infestations, mealy bugs are becoming more and more commonplace.Amblyseius swirskii could further improve the integrated control of the abovementioned infestations. Over the past few years, trickle applications of imidacloprid (Admire) were needed in increasing numbers of cases to combat whitefly, for example. This agent has a negative effect on the Feltiella population and also disturbs the parasitic wasps being deployed against whitefly. The use of A. swirskii could improve whitefly control and reduce dependence on Admire. This would make Feltiella more effective, which would in turn aid the control of spider mite.