Effect of Treated Squash Plants by Cytokinin Hormone (CKs) on the Infestation by Bemisia tabaci and Tetranychus urticae

Document Type : Original Article

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Plant Protection Research Institute, A.R.C., Dokki, Giza, Egypt

Abstract

            This study was carried out to study effect of treated squash plants Cucurbita pepo L. (var. Andro 174) by two concentrations of Cytokinin Hormone CKs (25 ppm and 45 ppm) on the infestation by Bemisia tabaci(Hemiptera: Aleyrodidae)and Tetranychus urticae Koch (Fam: Tetranychidae) at  Giza Governorate during 2017, 2018 seasons under glasshouse conditions.
            Results obtained showed that squash plants treated with a small concentration of CKs (25ppm) were lower infestation by both B. tabaciand T. urticae compared to control (plants which did not treat with any hormone). While squash plants treated with a high concentration of CKs (45ppm) were higher infestation by both the two pests compared to control.
            Also, results obtained showed that treated squash plants with a small concentration of CKs improved morphological characteristics and internal components of these plants compared to control, while when treated squash plants with a high concentration of the same hormone had badly effect on the morphological characteristics and internal components of these plants compared to control

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