الفعل الطارد و الجاذب للمستخلصات المائية و الأيثانولية لبعض الأدغال في مكافحة الذبابة البيضاء Bemisia tabaci Genn. (Homoptera : Aleyrodidae)‎

Abstract EN

This study included rearing The Whitefly Bemisia tabaci Genn.

(Homoptera: Aleyrodidae) in green house on the tomato plants Lycopersicon esculentum Mill.

Shaheera variety in the gardens of the Faculty of Education for Girls / Department of Biology for the purpose of conducting laboratory experiments about the effect on the repellency, attraction and ratio of balance of ethanolic extracts and aqueous extracts for ten local weeds (Sonchus oleraceus, Euphorbia pelpus, Sisymbrium irio, Melilotus indica, Chenopodium murale, Peganum harmala, Mentha pulegium, Plantago lanceolata , Cyperus capitatus and Malva sylvestris) collected from selected areas within the Al-Najaf province.

The attraction and repellency results for plant and extracts for weeds indicated that aqueous and ethanolic extracts of six kinds of weeds caused a percentages of repellency more than 50% which ranged according to their activities ( Sonchus oleraceus, Euphorbia pelpus , Melilotus indica , Sisymbrium irio, Mentha pulegium and Cyperus capitatus ) .

While three ethanolic and aqueous extracts have attraction more than 50% , which Chenopodium murale , Peganum harmala and Plantago lanceolata, The results of laboratory experiment by Field experiment proved that the infection rate was decreased results in lower rates of infestation when the plants treated by aqueous and ethanolic extracts at a concentration of 10 mg .ml-1, where the infection percentages decreased to 36.3 and 33.3% when treated by aqueous and ethanolic extracts for Sisymbrium irio.

As well as plants treated by Actara insecticide at a concentration of 0.3 mg .

ml-1 where the infection rate decreased to 7.4 % while the infection percentage in non treated plants was 96.3% .