Longevity and fecundity of Japanese beetle (Popillia japonica) on foliage grown under elevated carbon dioxide

Environmental Entomology
Bridget F O'NeillMay R Berenbaum

Abstract

Atmospheric levels of carbon dioxide (CO(2)) have been increasing steadily over the last century. Plants grown under elevated CO(2) experience physiological changes that influence their suitability as food. Previous studies have found increased insect herbivory on plants grown under elevated CO(2). To determine effects of consuming foliage of soybean (Glycine max) grown under elevated CO(2) on adult survivorship and fecundity, Japanese beetles (Popillia japonica Newman) were fed for the duration of their adult lives leaves grown under elevated CO(2) (550 mumol/mol), under ambient atmosphere (370 mumol/mol), or grown under ambient atmosphere but supplemented with a solution of sugars. To determine effects of a diet of foliage grown under elevated ozone (O(3)), another anthropogenic gaseous pollutant, beetles in the laboratory were fed soybean leaves grown under elevated CO(2), elevated O(3), or a combination of both elevated gases. Leaf tissue was also analyzed for longevity-enhancing antioxidants, because increases in dietary antioxidants can increase lifespan. Lifespan of Japanese beetles was prolonged by 8-25% when fed foliage developed under elevated CO(2), but consuming foliage that had taken up sugars to approximately the ...Continue Reading

References

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