Abstract Fifteen rose plants, 3 ft tall, were moated to restrict movement to and from the test plants. Rose plants potted in 3 gal containers were grown in a research greenhouse at MSU. On 5 Sep precounts were made by sampling 10 leaflets from each rose plant. Leaves were collected randomly from each plant. Treatments were applied on 6 Sep with an R & D single wand C02 sprayer with an 8003 nozzle at 50 psi. There were 5 replications of each treatment. On 7 Sep, 4 Phytoseiulus persimilis adults were released on plants treated with Andalin and on control plants. Sevin was applied a second time on 20 Sep. Postcounts began on 18 Sep and continued every wk after until 16 Oct.