Volume 2, Issue 3, September 2018, Page: 28-35
Responses of the Whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) to Biologically Based Insecticides
Hail Kamel Shannag, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
Malak Saleh Al-Haj, Faculty of Agriculture, Jordan University of Science and Technology, Irbid, Jordan
John Lowell Capinera, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, United States
Received: Oct. 4, 2018;       Accepted: Oct. 19, 2018;       Published: Nov. 10, 2018
DOI: 10.11648/j.aje.20180203.12      View  129      Downloads  18
The effects of three bio-insecticides Azatrol [neem: 1.2% azadirachtin A and B], Molt-X [neem: 3% azadirachtin], and Conserve SC [spinosad; 11.6% spinosyn A and spinosyn D], applied at different concentrations were evaluated on Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) under both laboratory and greenhouse conditions. Laboratory bioassays demonstrated that both neem-based insecticides were repellent to adult whiteflies in a dose-dependent manner. The amounts and frequency of honeydew excretion were significantly reduced up to 0.95 by foliar application of these insecticides at the labeled rate, as compared to untreated plants, with the neem products displaying greater effects on food uptake than spinosad. Reduced fecundity and egg hatch also were associated with these bio-insecticides. The bio-insecticides decreased significantly the survival of nymphs, egg hatch and adult emergence when applied systemically via the roots. However, the impacts of neem-based insecticides on all parameters tested were greater than that of spinosad. The results indicate that the biologically based formulations tested were effective in suppressing whitefly abundance and acting as an efficient repellent, though they were not able to completely inhibit food intake. The repellent and antifeedant activities of such natural products render plants unattractive to B. tabaci, thus potentially reducing the incidence of viral diseases transmitted by this pest. The systemic properties of these formulated biopesticides minimize their rapid degradation by strong ultraviolet light and their adverse effects on non-target organisms.
Whitefly, Bemisia tabaci, Biopesticides, Cucumber, Azadirachtin
To cite this article
Hail Kamel Shannag, Malak Saleh Al-Haj, John Lowell Capinera, Responses of the Whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) to Biologically Based Insecticides, American Journal of Entomology. Vol. 2, No. 3, 2018, pp. 28-35. doi: 10.11648/j.aje.20180203.12
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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