CHIRONOMIDAE (DIPTERA) ASSOCIATED WITH MYRIOPHYLLUM SPICATUM IN OKANAGAN VALLEY LAKES, BRITISH COLUMBIA

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Abstract
Eurasian water milfoil, Myriophyllum spicatum Linnaeus, was introduced into eastern North America late in the nineteenth century. It has spread and developed into a major aquatic weed in many areas of the United states and Canada (Aiken et al. 1979; Reed 1977). In British Columbia, it was first observed in the Vernon Arm of Okanagan Lake in 1970 and had spread to all major 1,akes in the Okanagan Valley by 1976 (Newroth 1979).