Date Received: 29-12-2025
Date Accepted: 13-02-2026
Date Published: 28-02-2026
##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2026.24.2.10
Views
Downloads
How to Cite:
Effects of Bifenthrin and Pyridaben on Biological Characteristics and Population Growth of the Predatory Mite, Neoseiulus longispinosus (Evans)
,
Pham Thi Hao
,
Ho Thi Thu Giang
,
Nguyen Duc Tung (*)
1
Keywords
Sublethal toxicity, life table parameters, acaricide, biological control, natural enemies
Abstract
Neoseiulus longispinosus is an important predatory mite that plays a key role in the biological control of phytophagous mites. This study aimed to evaluate the sublethal effects of bifenthrin (Talstar 25EC) and pyridaben (Alfamite 200WP) at LC30 on the biological traits and population growth of N. longispinosus. Adult females were exposed to each pesticide at LC30, and developmental, reproductive, and life-table parameters of the F1 generation were subsequently assessed under laboratory conditions. The results showed that neither pesticide significantly affected the developmental duration of immature stages. However, the pre-oviposition period and female life span were prolonged, whereas oviposition period, total fecundity, and longevity were significantly reduced with stronger effects observed for Alfamite 200WP. Life-table analyses revealed a marked reduction in population growth potential, as indicated by a decrease in the intrinsic rate of increase (rₘ) from 0.304 in the control to 0.279 and 0.246 in the Talstar 25EC and Alfamite 200WP treatments, respectively. These findings demonstrate that sublethal exposure to bifenthrin and pyridaben can substantially impair the biological control efficiency of N. longispinosus and should be carefully considered when integrating these pesticides into integrated pest management programs.
References
Birch L.C. (1948). The intrinsic rate of natural increase of an insect population. The Journal of Animal Ecology. 17: 15-26. Desneux N., Decourtye A. & Delpuech J.-M. (2007). The sublethal effects of pesticides on beneficial arthropods. Annual Review of Entomology. 52(1): 81-106.
Ghadim Mollaloo M., Kheradmand K. & Talebi A.A. (2018). Sublethal effects of pyridaben on life table parameters of the predatory mite Neoseiulus californicus (McGregor)(Acari: Phytoseiidae). Zoology and Ecology. 28(1): 56-63. Hamedi N., Fathipour Y. & Saber M. (2011). Sublethal effects of abamectin on the biological performance of the predatory mite, Phytoseius plumifer (Acari: Phytoseiidae). Experimental and Applied Acarology. 53(1): 29-40. Havasi M., Kheradmand K., Mosallanejad H. & Fathipour Y. (2019). Sublethal effects of diflovidazin on demographic parameters of the predatory mite, Neoseiulus californicus (Acari: Phytoseiidae). International Journal of Acarology. 45(4): 238-244. Hulting F.L., Orr D.B. & Obrycki J.J. (1990). A computer program for calculation and statistical comparison of intrinsic rates of increase and associated life table parameters. Florida Entomologist. 73: 601-612. Huyen L.T., Tung N.D., Lan D.H., Van Chi C., De Clercq P. & Van Dinh N. (2017). Life table parameters and development of Neoseiulus longispinosus (Acari: Phytoseiidae) reared on citrus red mite, Panonychus citri (Acari: Tetranychidae) at different temperatures. Systematic and Applied Acarology. 22(9): 1316-1326. Ibrahim Y B. & Yee T.S. (2000). Influence of sublethal exposure to abamectin on the biological performance of Neoseiulus longispinosus (Acari: Phytoseiidae). Journal of Economic Entomology. 93(4): 1085-1089. Maia A.d.H., Luiz A.J. & Campanhola C. (2000). Statistical inference on associated fertility life parameters using jackknife technique: computational aspects. Journal of Economic Entomology. 93(2): 511-518. Manita K. & Akio T. (2006). Effects of Some Pesticides on the Predatory Mite, Neoseiulus longispinosus (Evans)(Gamasina: Pytoseiidae). Journal of the Acarological Society of Japan. 15(1): 17-27. Meyer J.S., Ingersoll C.G., McDonald L.L. & Boyce M.S. (1986). Estimating uncertainty in population growth rates: jackknife vs. bootstrap techniques. Ecology. 67(5): 1156-1166. Nguyen D.T., Vangansbeke D., Lü X. & De Clercq P. (2013). Development and reproduction of the predatory mite Amblyseius swirskii on artificial diets. BioControl. 58(3): 369-377. Rao K.S., Vishnupriya R. & Ramaraju K. (2017). Efficacy and safety studies on predatory mite, Neoseiulus longispinosus (Evans) against two spotted spider mite, Tetranychus urticae Koch under laboratory and greenhouse conditions. Journal of Entomology and Zoology Studies. 4: 835-839. Sandeep V., Rajashekharappa K., Sharanabasappa S. D. & Mallikarjuna H. B. (2025). The effects of chlorfenapyr on the life history traits and population parameters of Neoseiulus longispinosus Evans (Mesostigmata: Phytoseiidae). Acarologia. 65(3): 887-899. Sehat-Niaki N., Golpayegani A. Z., Torabi E., Saboori A., Amiri-Besheli B. & Havasi M. (2025). Sublethal effects of chlorfenapyr on biological parameters of Tetranychus urticae (Acari: Tetranychidae) and predatory mites Phytoseiulus persimilis and Neoseiulus californicus (Acari: Phytoseiidae). Systematic and Applied Acarology. 30(4): 754-769. Wang S., Tang X., Wang L., Zhang Y., Wu Q. & Xie W. (2014). Effects of sublethal concentrations of bifenthrin on the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae). Systematic and Applied Acarology. 19(4): 481-490.