Extensive trials with mixtures of Bacillus thuringiensis var. kurstaki Berliner (Dipel wettable powder) and pyrethroids showed the efficacy of these mixtures against winter moth, Operophtera brumata (L.), and their compatibility with integrated mite control in apple ( Malus domestica Borkh.) orchards. In the mixtures, concentrations of the pyrethroids (cypermethrin, deltamethrin, fenvalerate, and permethrin) were one-tenth of the recommended orchard rates. Levels of winter moth injury to harvested fruit were as low with the mixtures of Dipel and pyrethroids as with half-rate or full-rate treatments of pyrethroids. Prebloom application of several mixtures significantly reduced fruit injury caused by mirids, mostly Atractotomus mali (Meyer) and Campylomma verbasci (Meyer), and the pale apple leafroller, Pseudexentera mali Freeman, and the obliquebanded leafroller, Choristoneura rosaceana (Harris). Counts of European red mite, Panonychus ulmi (Koch), and apple rust mite, Aculus schlechtendali (Nalepa), were lower, and populations of their principal natural enemy, Typhlodromus pyri Scheuten, were detected more frequently in plots treated with Dipel-pyrethroid mixtures than in plots treated with pyrethroids at half or full rates. Levels of leaf bronzing induced by European red mite and apple rust mite were also less where mixtures were used. The mixture of Dipel with the emulsifiable concentrate formulation of cypermethrin was particularly compatible with integrated mite control. Counts of European red mite and levels of leaf bronzing induced by European red mite with this mixture did not differ from the levels observed in the plots treated with Dipel alone.