تاثیر بازدارندگی تخمریزی عصاره گیاهان شاترهFumaria parviflora و کلپوره Teucrium polium روی سفید بالک پنبه Bemisia tabaci

Bemisia tabaci is an important pest of agricultural products. As a result of excessive use of chemical pesticides that have led to problems such as pest resistance to pesticides and their outbreak, using low-risk alternative compounds such as plant extracts has gained considerable attention. Considering the insecticidal properties of Teucrium polium and Fumaria parviflora, the present study assessed the spawning inhibition of these herbal species on Bemisia tabaci. This research evaluated varying concentrations (6000, 4000, and 8000 ppm) of ethanolic extract of Teucrium polium and Fumaria parviflora. The control group contained distilled water with dimethylsulfoxide and tween 20. Tomato plants with 2 to 4 leaves were treated by immersion method. The treated plants were placed in glass cages by hydroponic method. In each cage, a pair of mature male and female insects were released and the number of eggs laid on each plant after 72 hours was recorded by stereomicroscope and the percentage of spawning inhibition was calculated. The experiments were conducted based on the factorial design. Statistical results showed, there was a significant difference between the different concentrations of plant extracts in terms of spawning inhibition. The highest and lowest rates of spawning inhibition were observed by 8000 and 4000 ppm extracts of Fumaria parviflora, respectively. The rate of spawning inhibition was increased directly with the concentration of each extract. The extract of Fumaria parviflora showed more spawning inhibitory activity than the extract of Teucrium polium. According to the results, these plants can be used for the population control of Bemisia tabaci in integrated pest management.