Abstract Scotch pine, 2-2.5 m tall, growing in a Christmas tree plantation in Wayne Co., OH, were used to evaluate insecticides against three separate stages of a pine needle scale: overwintering eggs, crawlers with some 1st stage nymphs, and new females prior to oviposition. Treatments were applied to overwintering eggs on 16 Apr under sunny skies, 15°C, and 16-24 km/h winds with 10.5 cm rainfall during this test period. On 7 May crawlers and settled 1st stage nymphs were treated under sunny skies, 23°C, and 24-32 km/h winds, with 5.33 cm rainfall during this test period. On 20 Jun new females were treated under cloudy skies, 18°C, and 8-16 km/h winds, with 2.3 cm rainfall during this test period. An Echo backpack mistblower operating at half-throttle on aperture setting # 3 for 25 s was used to deliver ca. 1260 ml of finished spray to each of the three, single-tree replicates per treatment. Dormant, over-wintering egg treatments were evaluated 18 May by removing three needle fascicles from each replicate tree and counting the number of non-parasitized (with chorion) females vs the number of live crawlers per fascicle. Crawler/lst stage nymph treatments were evaluated 18 May by removing five fascicles from each replicate tree and assessing percent mortality of scales present. Treatments to control new females were evaluated 2 Jul, using the same method.