The effects of spirotetramat on life history traits and population growth of Tetranychus urticae (Acari: Tetranychidae) |
| |
Authors: | Dejan Marcic Slavka Petronijevic Tanja Drobnjakovic Mirjana Prijovic Pantelija Peric Slobodan Milenkovic |
| |
Affiliation: | (1) Laboratory of Applied Entomology, Institute of Pesticides and Environmental Protection, Banatska 31B, P.O. Box 163, 11080 Belgrade-Zemun, Serbia;(2) Graduate School of Biofarming, Megatrend University, Marsala Tita 39, 24300 Backa Topola, Serbia |
| |
Abstract: | The effects of spirotetramat, a tetramic acid derivative, on gross fertility, net fertility, female longevity and the instantaneous rate of increase of two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae) were investigated after treatment of female teleiochrysalises (the first assay) and pre-ovipositional females (the second assay). Spirotetramat was applied to the leaf discs by Potter spray tower and the following series of concentrations was applied: 200, 60, 18, 5.4 and 1.62 mg/l. In both assays after 24 h of exposure, surviving females without symptoms of poisoning were used for further procedure. In the first assay, gross fertility of treated females was reduced by 2.4–64.7% and net fertility by 12.4–88.8%, compared to the control. Gross fertility of the females treated with 1.62 and 5.4 mg/l did not significantly differ from the control, whereas all concentrations, except the lowest, significantly reduced net fertility and female longevity. Treatments with 200, 60, and 18 mg/l significantly reduced the instantaneous rate of increase. In the second assay, gross fertility and net fertility were reduced by 43.7–93.3% and 73.8–98.5%, respectively. All concentrations, except the lowest, significantly reduced gross fertility, whereas net fertility and longevity in all treated females were significantly lower compared to the control. All concentrations, except the lowest, significantly reduced the instantaneous rate of increase, provided that concentrations of 200, 60 and 18 mg/l caused population decline. The effects of spirotetramat and its impact on T. urticae management are discussed. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|