Different concentrations of Melia azedarach L. (Meliaceae) ethanolic extract on the developmental time and egg laying of Tetranychus urticae Koch

The use of plant-derived chemicals is a new recommended method to control Tetranychus urticae. According to recent studies, Melia azedarach has several compounds which could be effective on insects and mites. The effect of the extract on the fertility and pre-mature period of the mites were investigated at concentrations of 1, 3, 4 and 5?mg mL^?1 of the extract under laboratory conditions. The effect of chemicals extracted from plants was determined using the spraying bioassay method. The leaves being the location of the mites’activity, were sprayed with ethanol extract, then the mites were placed on the discs. In this experiment, the results show that all concentrations were effective, but extract concentrations 4 and 5?mg mL^?1 caused a reduction of more than 50% in the egg laying of the mites and a significant increase in their pre-mature period.