Abstract
Control of the birch leaf miner (Fenusa pusilla (Lep.)), the holly leaf miner(Phytomyza ilicis (Curt.)), and the boxwood leaf miner (Monarthropalpus (Lab.)) was obtained with 2% Thimet granules sifted onto the surface of the ground under the plants as far as their periphery. With the exception of small holly plants, the granules were not worked into the soil. In most instances watering was done to facilitate quick absorption of the systemic by the plants. April treatments gave good control of the first two broods of birch leaf miners, whereas June treatments were not so effective. Holly leaf miner was effectively controlled in large trees with 4 to 16 oz. and in small trees with 1 to 2 oz. of Thimet. Most boxwood leaf miners were destroyed with 0.08 to 0.32 oz. and somewhat less effective. results were obtained with 0.01 to 0.005 oz. of Thimet per average22-inchplant.
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