| Effectiveness of Mario-pro on Tetranychus urticae in laboratory |
| Paper ID : 1115-IPCA5 (R2) |
| Authors |
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Zeynab Keykhosravi *1, Neda Kheradpir2 1PhD Student in Agricultural Entomology, Varamin-Pishva Branch, Islamic Azad University, Varamin, Tehran Province, Iran 2Assistant Professor, Department of Plant Protection, Faculty of Agriculture, Varamin-Pishva Branch, Islamic Azad University, Varamin, Tehran Province, Iran |
| Abstract |
| Regarding the great importance of Tetranychus urticae as a major pest of numerous plants, it is necessary to find a rapid and logical management method. In this study, the mortality rate of T. urticae was assessed under the treatment of Mario-pro in five concentrations (500, 750, 1000, 1500, and 2000 ppm) and control without treatment on the infected eggplant leaves. The experiments were conducted under laboratory conditions at 26±1˚C, 65±5% RH, and 16L:8D photoperiod. Before the treatments, 90 individuals in different active stages, larvae, nymphs, and adults, were counted on the infected leaves. All experiments were conducted in triplicate.. The mortality was recorded after 4, 6, and 24 hours. The data were analyzed in a regression test by SPSS v.22. The results showed significant differences between the impact of Mario-pro concentration, the developmental stage, and the time of treatment on the mortality of T. urticae. The interactions between the acaricide concentrations, time, and developmental stage showed significant differences. Regardless of the developmental stage, the lowest mortality rate was recorded for 500 ppm (11.97 %), and the highest lethality was recorded for 2000 ppm (88.02 %); The mortality rate for larvae, adults, and nymphs was evaluated as 44.87%, 38.7%, and 41.27%, respectively for all acaricide concentrations; there was not any significant difference in mite mortality at the different developmental stages. Predictably, the time of treatment showed a significant difference, too; by passing time, higher mortality rates were recorded for all the concentrations and developmental stages. It can be concluded that the timing of treatment was effective for T. urticae, as the mites required at least one day to demonstrate the efficiency of Mario-pro. Furthermore, the highest effect was observed at a concentration of 2000 ppm. |
| Keywords |
| Tetranychus urticae, Mario-pro, mortality, developmental stage |
| Status: Abstract Accepted |
