Feeding from pollen grains of five ornamental roses: its effects on reproductive characteristics and demographic parameters of the predatory mite Amblyseius swirskii

Articles in Press

Document Type : Research Paper

Authors

Department of Plant Protection, SR.C., Islamic Azad University, Tehran, Iran

Abstract

The predatory mite Amblyseius swirskii is one of the most important biological control agents. The pollen grains of various Rosaceae plants have been effective in improving the development and reproduction of general phytoseiid predatory mites. This study investigated the effects of feeding from pollen grains of five ornamental roses (China rose, Damask rose, Avalanche rose, Iceberg rose and Samurai rose) on the mite life parameters. The experiments were conducted at 25 ± 2◦C, relative humidity of 60 ± 10%, and a photoperiod of 16 hours. In control, mites were fed with the eggs and immature stages of Tetranychus urticae. The results showed that the intrinsic rate of increase (r) in the predators fed with China rose pollen (0.206 day-1), followed by Damask rose pollen (0.199 day-1), was higher than the rest and followed by Avalanche, Samurai, Iceberg pollen, and control with the values ​​of 0.171, 0.166, 0.164, and 0.156 day-1, respectively. The pre-adult mortality in China rose pollen treatment was 10.4%, but the mites in this treatment developed faster (6.26 days) and started laying eggs in a shorter time (7.46 days). Also, the oviposition time and the number of eggs laid in the mites fed with Damask rose pollen (29.25 days, 59.38 eggs/female, respectively) followed by China rose pollen (24.35 days, 42.65 eggs/female, respectively) were more than others. Therefore, all rose pollen grains were suitable food for the development and reproduction of A. swirskii mites. However, pollens of China and Damask roses showed better performance in population growth of this predatory mite.

Keywords

Journal of Applied Research in Plant Protection

Articles in Press, Accepted Manuscript
Available Online from 19 July 2025

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History

  • Receive Date: 30 November 2024
  • Revise Date: 11 March 2025
  • Accept Date: 05 April 2025

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