Effects of elevated CO2 concentrations on host finding behavior of corn leaf aphids Rhopalosiphum maidis
Publication date :
22 May 2018
Event name :
The 70th International Symposium on Crop Protection
Event date :
22-05-2018
Audience :
International
Commentary :
Global change, especially the rise in greenhouse gas concentration, has caused great concern around the world. The increasing concentration of atmospheric carbon dioxide (CO2) not only affects the plant growth and development, but also changes plant volatile organic compounds (VOCs), which indirectly impacts the herbivorouse insects. In this study, we compared the olfactory host finding behaviors of three morphs of corn leaf aphids by observing, the choice of nymph, wingless and winged adults to clean air, ambient CO2 (aCO2) and elevated CO2 (eCO2) barley seedlings in using a Y-tube olfactometer. The results significantly showed that mMore aphids chose the odour of aCO2 barley seedlings when tested against eCO2 barley seedlings or clean air, eCO2 barley seedlings was chosen more often when tested next to clean air. The wWingless and winged aphids spent more time on eCO2 barley seedlings than on aCO2 barley seedlings, but average fecundity on aCO2 barley seedlings was higher than on eCO2 barley seedlings at the same time periods. Our findings lay foundation for the behavioral response of different morphscorn aphid under changing environments.
