The effects of rubidium chloride were characterized on immature and adult Grapholita molesta (Busck) in an effort to determine its suitability as a label to mark, release and recapture this species in field-based dispersal studies. Neonate G. molesta (Busck) larvae were fed lima bean-based diet enriched with 0, 600, 3,000 or 6,000 mg RbCI / L liquid diet (ppm). Both male and female adult G. molesta were successfully marked at the 3 highest concentrations. Increasing concentrations did not alter pupal mass or larva-to-adult development (first instar to adult death), but adult longevity decreased in response to increasing Rb concentrations in diet. All males and 83.3% of females reared on diet with 6,000 ppm RbCI retained a detectable Rb signature through 168 h post eclosion. Labeled males were more likely to exhibit stationary zig-zag flight prior to flying upwind to a sex pheromone lure in a wind tunnel. These experiments demonstrate that rubidium chloride may be used to label immature G. molesta for subsequent release and recapture without significant detrimental effects to the insects.
All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Agronomy and Crop Science
- Insect Science