Systemic Insecticides for Control of Scales, Leaf Miners, and Lace Bugs

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Abstract
Soil drenches of phorate and Phosdrin® (1-methoxycarbonyl-1-propen-2-yl dimethyl phosphate, 60% technical) were more effective than Di-Syston® ( O,O -diethyl S -2-(ethylthio) ethylphosphorodithioate), and Sytam® (4 pounds per gallon of schradan) in controlling scale on holly ( Asterolecanium sp.). Pine needle scale ( Phenacaspis pinifoliae (Fitch)) was controlled with phorate granules. Dimethoate granules were more efficient than phorate in killing first-brood birch leaf miners ( Fenusa pusilla (Lep.)), but less so on the second brood. Dimcthoate granules controlled leaf miners in holly ( Phytomyza ilicis (Curt.)) and boxwood ( Monarthro palpus buxi (Lab.)) and lace bugs ( Stephanitis spp.) on andromeda, azalea, and rhododendron. Phosphamidon gave poor control of leaf miners but good control of lace bugs.

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