Efficiency of cold aqueous and alcoholic extract of Nerium oleander L. flowers. In the control of the sunn insect Hemiptera: Scutelleridae) Eurygaster maura ( Geoffroy) on the wheat crop in Babylon Governorate

Abstract

The study aimed to know the effect of cold aqueous and alcoholic extract of oleander flowers. Nerium oleander L. on adults and nymphs of Sunnite. The results of the study showed the superiority of the alcoholic extract compared to the aqueous extract, where the alcoholic extract gave the highest death rate of 83.3% at a concentration of 30 mg/ml during 5 days compared to the aqueous extract, which gave a death rate of 80.0% at a concentration of 30 mg/ml during the same period for adults. The results also showed the effect of both alcoholic and aqueous extract on the second nymphal stage, as it gave the highest mortality rate of 100.0 at a concentration of 30 mg/ml during 1 day. As for the effect of the extracts on the fourth nymphal phase, both alcoholic and aqueous extracts gave the highest mortality rate of 100.0% during the 7 days for both extracts. Keywords: sunn insect, wheat, oleander