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Demography and population fitness traits of Spodoptera frugiperda (Lepidoptera: Noctuidae) under elevated temperature and CO2 levels

The demography and population fitness of fall armyworm, Spodoptera frugiperda was studied by comparing ambient (31 °C + 415 ppm) with elevated (33 °C + 460 ppm and 35 °C + 520 ppm) environmental conditions. The experiments with temperature and CO 2 levels were conducted by using Soil Plant Atmospher...

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Published in:International journal of tropical insect science 2023-12, Vol.43 (6), p.2189-2200
Main Authors: Karuppannasamy, Ashok, Venkatasamy, Balasubramani, Kennedy, John Samuel, Vellingiri, Geethalakshmi, Natarajan, Sathiah
Format: Article
Language:English
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Summary:The demography and population fitness of fall armyworm, Spodoptera frugiperda was studied by comparing ambient (31 °C + 415 ppm) with elevated (33 °C + 460 ppm and 35 °C + 520 ppm) environmental conditions. The experiments with temperature and CO 2 levels were conducted by using Soil Plant Atmosphere Research (SPAR) chamber. The life history data of S. frugiperda was analyzed by age-stage, two-sex life table. Results revealed that developmental time and age-stage-specific survival rate ( s xj ) of S. frugiperda at age ( x ) and stage ( j ) reduced with the increase in temperature and CO 2 levels. The fecundity rate and age-stage-specific reproductive rate ( v xj ) at age x and stage j were recorded highest at 33 °C + 460 ppm but it was significantly reduced at 35 °C + 520 ppm. S. frugiperda reared under an elevated level of 33 °C + 460 ppm showed the highest net reproductive rate ( R 0 ), intrinsic ( r m ), and finite rate of increase ( λ ) when compared to ambient. However, these fitness traits decreased at the elevated level of 35 °C + 520 ppm. These results suggest that the fitness traits of S. frugiperda were altered concerning the future scenario of global climate change under increasing temperature and CO 2 levels.
ISSN:1742-7592
1742-7584
1742-7592
DOI:10.1007/s42690-023-01122-3