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acaricidal Activity of Extracts of Juglans regia L. on Tetranychus urticae Koch （Acari： Tetranychidae）

Journal of Food Science and Engineering 2017年第4期7卷 202-208页

作者： Pervin Erdogan Betul Sever Yilmaz Plant Protection Central Research Institute Gayret Mah. Fatih Sultan Mehmet Bulvart Yenimahalle-Ankara 66 06172 Turkey Ankara University Faculty of Pharmacy Tandogan-Ankara 06100 Turkey

Two-spotted spider mite （Tetranychus urticae Koch）（Acari： Tetranychidae） is a very serious pest worldwide, causing considerable damage to vegetables, flowers and fruit crops. The application of plant extracts to control insects can be an effect.ve alternative. In this study, the efficacy of an extract from Juglans regia L. （Juglandecaea） was tested as an alternative to conventional acaricides. Using two different methods, bioassays were used to determine the effect. of varying concentrations J. regia （1%, 3%, 6%, 12%） of the extracts. Experiments were carried out using 3 cm diameter leaf disks of Phaseolus vulgaris L. In addition, the effect. of the extract on mite reproduction and oviposition were investigated. As a result, in the leaf dipping method, the 12% concentration of the extract caused the highest mortality of nymph （90%） and adult （83.00%） stages. For the spraying method, the mortality of adults at the same concentration was 100%. In bioassays at lower concentrations, the adult mites laid lower numbers of eggs in comparison to the untreated mites. The highest effect.occurred at concentration of 12% and the lowest effect.was at 1%. The extract was no observed ovicidal effect.

关键词： Two-spotted spider mite duglans regia L. extract acaricidal effect.

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Ethanol Extraction of Hyoscyamus niger and Hypericum calycinum Evaluated for acaricidal Activity against Tetranychus urticae Koch （Acari： Tetranychidae）

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Journal of Food Science and Engineering 2018年第1期8卷 46-54页

作者： Pervin Erdogan Errol Hassan Betul Sever Yilmaz Gulcin Saltan Plant Protection Central Research Institute Gayret Mah. Fatih Sultan Mehmet Bul. 66 06172 Yenimahalle Ankara 06172Turkey School of Agriculture and Food Sciences 4343 Queensland 4343 Australia Ankara University Faculty of Pharmacy Emniyet Mah. 06100 Tandogan Ankara 06100 Turkey

Hyoscyamus niger L. （Solanaceae） and Hypericum calycinum L. （Hypericaceae） were collected from two provinces Bursa and Ankara in Turkey during flowering stages. Extracts obtained from H. niger and H. calycinum were tested against two-spotted mite as an acaricidal pesticide. Bioassay experiments were carried out under laboratory conditions using two different methods namely, leaf disc dipping and direct leaf spraying. Two-spotted mite was reared in insectary using Phaseolus vulgaris L. （Fabaceae）. In the leaf dipping method, H. niger extract resulted in an effect.ve adjusted mortality for larvae of 87.13% and for adults of 81.66%. For H. calycinum the adjusted mortality for larvae and adults was 77.77% and 85.97% respectively at the highest concentration. In larval stage, LCs0 values were 5.47 w/v and 3.32 w/v dipping and spraying method respectively. In addition, adult stage, it was determined that LCs0 values were 1.17 w/v and 3.56 w/v in both methods. For leaf spraying method. H. niger resulted in an adjusted showed an effect.against larvae and adults mortality rate was 95% and 91% respectively. However, H. calycinum mortality percentage was 80% and 87% at 12% concentration, with LC50 values of 9.62 w/v and 2.13 w/v in dipping method. In this research apart from mortality effect. on egg, reproduction was also investigated. Each concentration showed that treated females laid less eggs compared to the untreated females.

关键词： Two-spotted spider mite henbane St-John's Wort extract acaricidal effect.

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