Abstract

The extracts of Xanthium strumarium L., Tanacetum parthenium L. and Achillea wilhelmsii C. (Asteraceae) were prepared for testing against Myzus persicae Sulzer (Hemiptera: Aphididae). Formulations obtained from the extracts were subjected to quality control tests in the laboratory. According to the results of tests, preparations found successfully were separated and chosen for effectiveness studies on M. persicae. Effect of prepared formulations at three different doses were determined on M. persicae by using leaf dipping at the laboratory conditions. Fresh eggplant leaves were used for dipping bioassay experiments. As a result of the study the highest dose was found effective against the aphid. Effective dose and the two higher doses were used to examine effect on M. pesicae at the greenhouse conditions. The trial was established as randomized block design in greenhouse. The pepper plants were sprayed when the density of green peach aphid population 20-25 alive individual/leaf. Alive individuals were counted one, three and seven days after applications. All formulations showed the highest effect at 10ml/l dose. Additionally, in the greenhouse conditions, the highest dose of X. strumarium caused phytotoxicity. The formulations of A. wilhelmsii and T. parthenium had high mortality rate. The formulations of X. strumarium showed the highest effect at dose15ml/l. 

Keywords

formulations, green peach aphid, insecticidal activity, plant extract