``It's not just that they're in low numbers in a few habitats near agricultural fields. They found that parasitic wasps transplanted from Texas and China into Hawaii more than half a century ago to prey on pests that devour sugar cane have emerged as commanding figures in the complex food web of a boggy forest on Kauai island, many miles away from where they were introduced. Laurie Henneman of the University of Bristol in Britain sought to determine the degree to which alien species imported as so-called biological control agents had infiltrated a local ecosystem. In research appearing in the journal Science, ecologists Jane Memmott and M. Introducing non-native species to control pests, researchers said on Thursday parasitic wasps brought to Hawaii as part of sugar cane farming had become the dominant WASHINGTON (Reuters) - Documenting the ecological perils of "Study Shows Perils of Importing Non-Native Species" I "borrowed" the following from another website with some editing: We have been assured that these introduced aliens are not hazzards in the general natural environment. For years governments and private labs have been testing and releasing "beneficials," predators and parasitoids attacking pest bugs and mites.
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