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[rrs]

leaf rollers
Pond is 2 years old. Several aquatic plants including Cannas. Cannas are subject to Leaf Rollers - a worm type bug which fastens the emerging leaves with a silk like substance. When the silk is cut or broken, there may be a worm type thing in the leaf, or, it may already have progressed to some other form (?).

Does anyone know of a chemical (or other treatment), which will kill the leaf roller but not kill the fish???