Abstract
Many omnivorous insects are important biological control agents, and their success is influenced by both plant resistance and prey availability. The potential impact of these two factors is complicated by the fact that they may not be independent: Resistant plants also often support fewer herbivorous prey. We studied how lifetime development, growth, fecundity and preference of the omnivorous stink bug, Podisus maculiventris, was affected by jasmonate-induced plant defenses and amount of prey available. P. maculiventris survival was 70 % lower on high-resistance (jasmonate-overexpressing) plants compared to low-resistance (jasmonate-insensitive) plants. However, surviving P. maculiventris grew and achieved equal fecundity on low- and high-resistance plants. When given a choice, P. maculiventris preferred low-resistance plants, but did not differentiate between caterpillar prey reared on high- or low-resistance plants. Low prey availability impacted distinct aspects of P. maculiventris performance: Development time was lengthened, and nymphal and adult mass were reduced, but survival was not impacted. We did not detect any interactive effects between plant resistance and prey availability for any measure of P. maculiventris. Thus, we found remarkably compartmentalized impacts of plant resistance and prey availability for this omnivorous insect.



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Acknowledgments
We thank Jessica McArt and Natasha Tigreros for help with survival analysis and Ordom Huot for caring for experiments over breaks. This project was supported by the National Research Initiative of the USDA Grant 2006-35302-17431 (JST), the Hunter R. Rawlings III Cornell Presidential Research Scholars program (EO) and Federal Capacity Funds 139-7484 (JST).
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Thaler, J.S., Olsen, E.L. & Kaplan, I. Jasmonate-induced plant defenses and prey availability impact the preference and performance of an omnivorous stink bug, Podisus maculiventris . Arthropod-Plant Interactions 9, 141–148 (2015). https://doi.org/10.1007/s11829-015-9357-0
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DOI: https://doi.org/10.1007/s11829-015-9357-0

