The metabolic rate of midgut, fat body and ovaries from Oncopeltus fasciatus adult female has been studied, comparing the results with that from juvenile hormone or precocene II treated insects. Neither juvenile hormone nor precocene II had any effect on midgut and fat body. Precocene II treatment increased the oxygen consumption rate of ovaries, which in turn remained undeveloped. Juvenile hormone had no detectable effects on the metabolic rate of ovaries, other than accelerate their development.
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