The widespread planting of a genetically engineered crop designed to withstand a menacing pest has had the unanticipated consequence of transforming benign bugs into agricultural predators, according to a new study.
In findings that drive home the difficulty of trying to stay one step ahead of nature, scientists explain how farmers of bioengineered cotton in northern China were able to drastically reduce their insecticide use for more than a decade, only to find themselves spraying a crop that wasn't supposed to need such measures.
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