Developing a biologically-based IPM program for western flower thrips (Frankliniella occidentalis) in greenhouse floriculture

Few conventional insecticides registered in Canada today effectively control western flower thrips. Consequently, biological control agents are increasingly used. However, as tolerance for cosmetic damage is extremely low, a single biocontrol agent (the pesticide paradigm) rarely provides satisfactory levels of control. Strategic selection and use of several natural enemies together, within a bio-based IPM program, can provide an effective solution. Here, we report on trials to investigate interactions between microbial biocontrol agents and the potential concurrent use of entomopathogenic fungi and nematodes to form the basis of an efficacious and cost-effective thrips management program.