Population performance and detoxifying and protective enzyme activities of four thrips species feeding on flowers of Magnolia grandiflora (Ranunculales: Magnolia)

• Published in: Pest management science Vol. 79; no. 9; pp. 3239 - 3249
• Main Authors: Cao, Yu, Qi, Guiling, Jiang, Feiyu, Meng, Yonglu, Wang, Chun, Gu, Zhaoyang, Gao, Yulin, Reitz, Stuart R, Li, Can
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.09.2023; Wiley Subscription Services, Inc
• Subjects: Animals; Carboxylesterase; Cytochrome; Cytochrome P450; Cytochromes P450; Environmental conditions; Enzymatic activity; Enzymes; Field investigations; Field tests; Flowers; flower‐dwelling thrips; Glutathione; host plant preference; Host preferences; Laboratories; life history; Magnolia; Magnolia grandiflora; Performance evaluation; Peroxidase; physiological enzymes; Plants; Population density; Population dynamics; Population number; Ranunculales; Species; Species diversity; Superoxide dismutase; Thrips hawaiiensis; Thysanoptera - physiology; flower-dwelling thrips; host plant preference; Thrips hawaiiensis; life history; Magnolia grandiflora; physiological enzymes; population dynamics
• DOI: 10.1002/ps.7509
• ISSN: 1526-498X

BACKGROUND Different thrips species can co‐occur on the same flowers with different dominance degrees. To accurately evaluate the population performance on different thrips species on Magnolia grandiflora flowers, we investigated the diversity of thrips species and their population dynamics both in the field and laboratory. In addition, the activities of detoxifying and protective enzymes in thrips were also measured. RESULTS Field investigations revealed that four thrips species (Thrips hawaiiensis, Thrips flavidulus, Frankliniella occidentalis, and Thrips coloratus) coexisted on M. grandiflora flowers. They were ranked, from highest population density to lowest, as follows: T. hawaiiensis > T. flavidulus > F. occidentalis > T. coloratus. In laboratory investigations, the species were ranked, from fastest developmental rates to slowest, as follows: F. occidentalis > T. hawaiiensis > T. flavidulus > T. coloratus; and from largest population size to smallest, as follows: T. hawaiiensis > F. occidentalis > T. flavidulus > T. coloratus. Biochemistry assays showed that the four species differed in their activities of detoxifying enzymes (carboxylesterase, glutathione‐S‐transferase, and cytochrome P450) and protective enzymes (superoxide dismutase, peroxidase) in both laboratory and field strains. CONCLUSION Differences in population performance among these four thrips on M. grandiflora may be related to their activity levels of physiological enzymes. The variations in thrips population performance between the field and the laboratory could be due to differences in environmental conditions. T. hawaiiensis showed a strong host preference for M. grandiflora, and thus it has the potential to be a dangerous pest in horticultural plants. © 2023 Society of Chemical Industry. Differences on the population performance and enzyme activities of four thrips species (Thrips hawaiiensis, Thrips flavidulus, Frankliniella occidentalis, and Thrips coloratus), feeding on flowers of Magnolia grandiflora, showed that Thrips hawaiiensis had the potential to be a dangerous pest in horticultural plants.