Insecticidal Activity of Three Different Plant Extracts on the Green Peach Aphid [(Myzus persicae Sulzer) (Hemiptera: Aphididae)]

Abstract

Green peach aphid [(Myzus persicae Sulzer) (Hem.: Aphididae)] is a very important pest worldwide, causing serious damage to vegetables, flowers and fruit crops and is a vector for virus. The efficacy of insecticides extracted from three different plants such as Xanthium strumarium L. (Asteraceae), Tanacetum parthenium L. (Asteraceae) and Hypericum calycinum L. (Hypericaceae) was tested as alternative insecticides. The insecticidal activity of three plants’ ethanol extracts were tested on M. persicae. For bioassays two different methods were used with different concentrations. Experiments were conducted using 3 cm diameter leaf disk from untreated radish [Raphanus sativus L. (Brassicaceae)]. All experiments were replicated 10 times. The experimental results X. strumarium, T. parthenium and H. calycinum extracts showed nymphal mortality of 89%, 88% and 57% respectively at the highest (12%) concentration. The mortality of adults at the same concentration of 12% was 82%, 88% and 57% respectively. For the spraying method, mortality of adults at the same concentration of 12% was 84%, 87% and 60% respectively.