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    Pharmacognosy Communications
    Research Article

    Repellence and Anti-oviposition Activities of Plant Products on Greenhouse Whitefly

    March 25, 2013Updated:August 10, 20212 Mins Read

    Mahsa Dehghania,b and Kamal Ahmadia*
    aDepartment of Plant Protection, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran.
    bMember of Young Researchers Society, Shahid Bahonar University of Kerman, Kerman, Iran.

    Pharmacognosy Communications,2013,3,2,2-5.
    DOI:10.5530/pc.2013.2.2
    Published on:25th Mar 2013
    Type:Research Article

    ABSTRACT

    Introduction: The greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera: Aleyrodidae), is an important cosmopolitan pest of many crops. Methods: The present study investigated the repellent and antioviposition activities of plant products from Achillea millefolium and Thymus vulgaris against this pest in greenhouse conditions. Cucumber plants were sprayed with the chemicals at 40 μl/ml concentration and control plants were treated with distilled water. Also, the essential oil of A. millefolium at the same volume (5 ml) was sprayed on the special filter paper (2×4 cm) attached at the petiole plant. Four treated plants and four control plants were placed randomly in to a cage. Three days after spraying, approximately 250 whitefly adults were released into the cages. Then three and six days after infesting, the number of eggs and adults were recorded. Each experiment was repeated two times at the same greenhouse condition. Results: The results revealed that all plant products affected the oviposition and tropism behaviors of greenhouse whitefly. Amongst the different treatments, the highest anti-oviposition effect was calculated by aqueous extracts of T. vulgaris (62.87 %) six days after treated. Moreover, the aqueous extract of A. millefolium had the highest repellent effect (52.54 %) six days after treatment. Also, the compare repellent activity of the chemicals on greenhouse whitefly adults indicated the highest repellent effect was evaluated by the essential oil of A. millefolium (48.07%) nine days after treatment. Conclusion: These results showed that A. millefolium and T. vulgaris had relatively long lasting repellent and anti-oviposition activities on the adults of the greenhouse whitefly.

    Keywords: Achillea millefolium, anti-oviposition activities, greenhouse whitefly, repellent activity, Thymus vulgaris.

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