Fear No Weevil?

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Science  22 Aug 1997:
Vol. 277, Issue 5329, pp. 1058-1059
DOI: 10.1126/science.277.5329.1058

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Biological control of pests can seem a safe, attractive alternative to pesticides. But the process can sometimes go alarmingly awry, as described in a report in this issue by Louda et al. on an introduced thistle and its control organism, a weevil. In his Perspective, Strong discusses the lessons we have learned from failed biological control measures, and how we can use this potentially important tool more effectively.