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Open AccessArticle

Using a Two-Sex Life Table Tool to Calculate the Fitness of Orius strigicollis as a Predator of Pectinophora gossypiella

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Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
2
Key Laboratory of Bio-Pesticide Innovation and Application, Guangzhou 510640, China
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Engineering Research Center of Biological Control, Ministry of Education, Guangzhou 510642, China
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Department of Entomology, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
5
Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
6
Key Laboratory of Bio-Pesticide Innovation and Application, Engineering Research Centre of Biological Control, South China Agricultural University, Guangzhou 510642, China
7
Key Laboratory of Integrated Pest Management on Crops in Central China, Ministry of Agriculture, Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
*
Author to whom correspondence should be addressed.
Insects 2020, 11(5), 275; https://doi.org/10.3390/insects11050275
Received: 25 March 2020 / Revised: 23 April 2020 / Accepted: 27 April 2020 / Published: 30 April 2020
A two-sex life table is a useful tool for studying the fitness of predators. Previous studies of Orius strigicollis Poppius (Heteroptera: Anthocoridae) fitness have not been done on Pectinophora gossypiella (Lepidoptera: Gelechiidae) using a two-sex life table tool. This study reports the fitness of the minute predatory flower bug, O. strigicollis when feeding on the cotton pest P. gossypiella using a two-sex life table tool. Different densities (5, 10, and 15 eggs) of P. gossypiella eggs were used to calculate the feeding capacity and fitness of O. strigicollis in the laboratory at 28 °C ± 1, 75 ± 5% RH and 16:8 (L:D). The results concluded that O. strigicollis is an efficient predator of P. gossypiella. The maximum growth capacity of the predatory bug O. strigicollis was attained when it was fed on 10 and 15 P. gossypiella eggs. Furthermore, shorter generation and development time were also observed in the case of 15 eggs of P. gossypiella. These results suggest that O. strigicollis has considerable predatory potential and prefers feeding on P. gossypiella eggs than on the first instar larvae at the fourth instar or the female stage. Although the field potential of O. strigicollis is still unknown, this study will support future investigations in terms of field applications. View Full-Text
Keywords: age-stage; feeding potential; Orius strigicollis Poppius; Pectinophora gossypiella; population parameters; selection pressure; two-sex life table age-stage; feeding potential; Orius strigicollis Poppius; Pectinophora gossypiella; population parameters; selection pressure; two-sex life table
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Ali, S.; Li, S.; Jaleel, W.; Musa Khan, M.; Wang, J.; Zhou, X. Using a Two-Sex Life Table Tool to Calculate the Fitness of Orius strigicollis as a Predator of Pectinophora gossypiella. Insects 2020, 11, 275.

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