کارایی فرمولاسیون های مختلف عصاره ی اتانولی میوه زیتون تلخ (.Melia azedarach L) براساس ساختار ذرات نانو در کنترل سفیدبالک گلخانه Trialeurodes vaporariorum Westwood

The greenhouse whitefly Trialeurodes vaporariorum (Hem.: Aleyrodidae) Westwood attacks many hosts. The abundant use of chemical insecticides has caused resistance and outbreaks of the pest population. For this purpose, the use of alternative methods in pest management, such as the use of natural compounds, is effective in controlling and reducing the risks caused by pests. In this research, contact insecticidal effects of different formulations of Persian lilac fruit extract were tested on the whitefly nymphal stage in laboratory conditions at Shahid Bahonar university of Kerman. In this research, the following treatments were used:
Nano emulsion of Persian lilac fruit ethanol extract with dimethyl sulfoxide emulsifier (DMSO-Melia), Persian lilac fruit extract that was ultrasonicated for 0.5 hours (Ultra Melia), Persian lilac fruit extract without ultrasonication (None Ultra Melia), Persian lilac fruit extract Nano-made by the chemistry department using the Newsome synthesis method)Nano Melia( and Merck DMSO.
In the first experiment, counting was done in two stages, in the first counting, the maximum percentage of mortalities in the DMSO-Melia treatment (29.00% ± 3.58%) and the minimum percentage of moratalties in the control treatment (7.61%±4.16) was observed. The results of the second count showed that the maximum percentage of mortalities was observed in DMSO-Melia (39.00% ± 5.33) and the minimum percentage of moratlities was observed in the control treatment (24.12% ± 4.83). In the second experiment, the counts were performed for three days and for 21 days. According to the results, it was found that on the third day, the maximum percentage of mortalities in the Ultra Melia treatment (%40.90 ± 5.99) and the minimum percentage of mortalities in the control treatment (%6.72 ± 4.40) was observed. It was also found that from the sixth day onwards, the maximum percentage of mortalities was observed in the Nano Melia(%41.66 ± 9.68) treatment and the minimum percentage of mortalities was observed in the control(%27.83 ± 4.97) treatment. It seems that the Nano Melia treatment has a greater and better effect on the nymphs due to the size of the particles in the nano scale.