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Box plots showing levels of irreplaceable mortality of immature B. tabaci by various factors in unsprayed cotton fields over 20 generations, 2000–2003, Maricopa, Arizona, USA (Naranjo SE, Ellsworth PC and Cañas L, unpublished). The line within each box represents the median, the box bounds the 25th and 75th percentiles, and the whiskers denote the 10th and 90th percentiles. Predation is the major mortality factor operating in untreated cotton.
