اثر دورکنندگی عصاره‌های استبرق و کرچک در مقایسه با ایمیداکلوپرید بر دو گونه از مورچه های دروگر بذر

Messor sp. is one of the most common genera of ants in arid and semi-arid ecosystems. The species M. caducus and M. platyceras belong to the common species of seed-harvesting ants in Iran. They reduce their yield by feeding on seeds, especially seeds of annual plants such as onion seeds. Using common chemical pesticides to control these ants can harm the environment. For this reason, it is necessary to find alternative and environmentally friendly methods to control these pests. In this study, the repellency effect of Sodom-apple and castor-been extracts was investigated on Messor sp. genera, and their effects were tested on the speed and percentage of onion seed germination. To determine the 50% repellent concentration (RC50) of these two compounds, bioassays were performed in a completely randomized design with four replications. Based on the results, it was found that both the examined extracts significantly reduced the percentage of greening at the highest concentration; However, low concentrations of Sodom-apple extract (176500, 180000, 189000, 196500 µL/L) and castor bean extract (58000, 62000, 67000, 78000, 88000, 90000, 93000 µL/L) did not significantly decrease the percentage of germination and the percentage and speed of onion seed germination, respectively. However, the extract of Sodom-apple in other high concentrations (189000, 197000, 210000, 217000, 222000 µL/L) had a significant effect on the germination rate of the seeds. According to the results of this research, it can be concluded that the extract of castor-been, while having a significantly better repellency effect and not hurting the percentage and speed of germination of onion seeds in most concentrations, is a more effective composition than Sodom-apple. However, in low concentrations, while having the ability to repel, Sodom-apple also had no side effect on the percentage and speed of onion seed germination; Therefore, according to the results of this research, it can be concluded that the extract of castor been, while having a significant effect on removal and not hurting the percentage and speed of germination of onion seeds in most concentrations, is a more effective composition compared to Sodom-apple. However, in low concentrations, while having the ability to repel, Sodom-apple also has no side effect on the percentage and speed of greening.