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An evaluation of some eco-friendly biopesticides against Bemisia tabaci on two greenhouse tomato varieties in Egypt

 Atef S. Abdel-Razek1, Nesreen M. Abd El-Ghany1*, Khaled Djelouah2, Abdelhameed Moussa1

 1Pests and Plant Protection Department, Agricultural and Biological Research Division, National Research Centre, 33 El-Buhouth St., Dokki, Giza, P.O. Box 12622, Egypt

2Integrated Pest Management Sector, CIHEAM-Mediterranean Agronomic Institute of Bari, Via Ceglie, 970010 Valenzano (Ba), Italy

 

*Corresponding address:

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Received: May 10, 2016

Accepted: January 30, 2017

 

Abstract

Th is study has two main approaches. First, it exploits the susceptibility of tomato cultivars as a prophylactic measure to detect auto resistance characters of the tested tomato varieties against Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae). Secondly, it evaluates the efficacy of different bio-rational insecticides against B. tabaci under greenhouse conditions. The results exhibited a special significance in B. tabaci infestation suitability between the two tomato varieties with a high infestation significance found in the Shifa F1 hybrid tomato variety compared to the Savera F1 hybrid tomato variety in the first plantation period. Subsequently, in the second plantation period, there was a significant difference between the two tomato varieties. Bemisia tabaci showed a preference for the Shifa F1 hybrid over the Savera F1 hybrid tomato variety. These differences occurred during the 1st, 2nd, 4th, 6th, 7th, 8th, and 10th weeks. In the experimental trial for the efficacy of eco-friendly biorational insecticides, spinosad, azadirachtin, Beauveria bassiana and Metarhizium anisopliae, there were significant differences between the treated and untreated plants during the two plantation periods. A high efficacy of spinosad on the B. tabaci population was found. Bemisia tabaci infestation under all the applications was reduced from 50 to 94.61% for the two plantation periods. This obvious decrease in B. tabaci population increase attention to benefits of the different bio-rational insecticides.

 

Key words: Bemisia tabaci, bio-rational insecticides, greenhouse, susceptibility tomato

 

 

 
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