Labeling the Apple Maggot with Strontium 891

Abstract
Newly emerged adults of the apple maggot, Rhagoletis pomonella, were fed strontium 89 as strontium chloride in 50% commercial apple juice. All the flies were labeled after 6 days of feeding, and all retained a measurable amount of isotope for at least 46 days. The degree of retention was followed in individual flies.

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