Data on the control of Philaenus leucopthalmus attacking strawberries were taken during the period 1939 to 1945. 8 vars. of the species are commonly found in central New York, and strawberry plants heavily infested by the insects, may be severely damaged. The plants become stunted and sickly in appearance, the fruit is small and misshapen and the leaves badly crinkled. P. leucopthalmus overwinters in the egg stage, the young nymphs appearing about April 1, transition to the adult stage occurring about the last of June. Caged [female][female] laid 18-51 eggs each, usually in masses, and on stems and leaves near the ground. The insecticides were used chiefly to destroy the nymphs, and the results therefore are based on the numbers of live nymphs captured in each plot after the treatments. The materials ranged from plain hydrated lime and ordinary talc to rotenone, DDT, nicotine and commercial mixtures with various conditioners. All rotenone sprays containing about 0.03% rotenone and applied at the rate of 300 gallons per acre gave excellent control. Rotenone dusts of 1% strength, with or without conditioners except in the case of one small test, gave 94-96% reduction in nymph population when used at 50 lbs. per acre. A 0.5% rotenone dust with an oil conditioner showed very promising results at the same dosage. A 5% DDT dust with an oil conditioner and used at 50 lbs. per acre gave >86% reduction. Hydrated lime at 500 lbs. per acre was very promising and inexpensive but left a heavy residue. All nicotine, pyrethrum and some commercial mixtures as used were apparently too low in tox-icity to be practical for use in controlling this insect. The optimum period for treatment during most seasons would come between the 15th and 31st of May when most of the insects were in the early nymphal stages.