Insects (2019) 10 (6 - 182)

Yu Chen, Clément Martin, Junior Corneille Fingu Mabola, François Verheggen, Zhenying Wang, KangLai He and Frederic Francis (2019)
Effects of host plants reared under elevated CO₂ concentrations on the foraging behavior of different stages of corn leaf aphids Rhopalosiphum maidis
Insects 10 (6 - 182)
Abstract: Climate change is a major environmental concern and is directly related to the increasing concentrations of greenhouse gases. The increase in concentrations of atmospheric carbon dioxide (CO₂), not only affects plant growth and development, but also affects the emission of plant organic volatile compounds (VOCs). Changes in the plant odor profile may affect the plant-insect interactions, especially the behavior of herbivorous insects. In this study, we compared the foraging behavior of corn leaf aphid (Rhopalosiphum maidis) on barley (Hordeum vulgare L.) seedlings grown under contrasted CO₂ concentrations. During the dual choice bioassays, the winged and wingless aphids were more attracted by the VOCs of barley seedlings cultivated under ambient CO₂ concentrations (aCO₂; 450 ppm) than barley seedlings cultivated under elevated CO₂ concentrations (eCO₂; 800 ppm), nymphs were not attracted by the VOCs of eCO₂ barley seedlings. Then, volatile compositions from 14-d-old aCO₂ and eCO₂ barley seedlings were investigated by GC-MS. While 16 VOCs were identified from aCO₂ barley seedlings, only 9 VOCs were found from eCO₂ barley seedlings. At last, we discussed the potential role of these chemicals observed during choice bioassays. Our findings lay foundation for functional response of corn leaf aphid under climate change through host plant modifications.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Database assignments for author(s): François J. Verheggen, Zhen-Ying Wang, Kanglai He, Frédéric Francis

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhopalosiphum maidis