Journal of Pest Science (2021) 94, 29-42

Yu Cao, Hong Yang, Yulin Gao, Lijuan Wang, Jun Li, Chun Wang and Can Li (2021)
Effect of elevated CO₂ on the population development of the invasive species Frankliniella occidentalis and native species Thrips hawaiiensis and activities of their detoxifying enzymes
Journal of Pest Science 94 (1), 29-42
Abstract: Increased atmospheric CO₂ concentrations may directly affect insect behavior and physiology. Native and invasive insects may have different levels of adaptability to elevated CO₂. The invasive species Frankliniella occidentalis and the native species Thrips hawaiiensis are economically important pests. We determined the effects of elevated CO₂ on these pests by monitoring their development, survival, and oviposition under different CO₂ concentrations (400, 600, and 800 μl L^-1). We also determined detoxifying enzyme activities in larvae and adults. Frankliniella occidentalis and T. hawaiiensis showed faster development but lower survival rates as the CO₂ concentration increased. Fecundity significantly increased in F. occidentalis but decreased in T. hawaiiensis with increasing CO₂ concentrations. The net reproductive rate (R₀) and intrinsic rate of increase (r_m) were highest in F. occidentalis and lowest in T. hawaiiensis in the highest CO₂ treatment. At each CO₂ concentration, compared with T. hawaiiensis, F. occidentalis developed faster and had higher survival rate, fecundity, R₀, and r_m. The activities of detoxifying enzymes, except for acetylcholinesterase activity in second instars, increased in both species with increasing CO₂ concentrations. Carboxylesterase and glutathione S-transferase activities were always higher in F. occidentalis than in T. hawaiiensis. At each CO₂ concentration, carboxylesterase and acetylcholinesterase activities were higher in adults, but glutathione S-transferase activities were higher in larvae, indicative of different physiological responses between adults and larvae. In summary, elevated CO₂ benefited the population development of F. occidentalis but negatively affected that of T. hawaiiensis. This may be related to the activities of detoxifying enzymes.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Yulin Gao

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Frankliniella occidentalis
	Thrips hawaiiensis