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How to Identify and Treat Aphids on Myrtles

Aphids feed by sticking their mouthparts into the plant and sucking out the sugar-rich sap. The aphids’ sticky waste, called honeydew, spawns black, sooty mold. Treatment includes two insecticides, one sprayed as usual and another applied to soil. When watered in, it is absorbed by the roots of the plant, rendering it poisonous to aphids.