Antifeedant and stomach poison effects of different plant extracts to Spodoptera littoralis (Lepidoptera: Noctuidae)

Antifeedant and stomach poison effects of 9 plant extracts were tested on Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae). Antifeedant effects of plant extracts varied from 22.44% to 68.96% and the most active plant extracts were Delphinium consolida (%68.96), Chrysanthemum segetum (62.67%), Artemisia vulgaris (61.09%) and Tanacetum mucroniferum (55.87%). Dose-response studies with the extracts showed that all extracts produced strong antifeedant effects ranging from 68.91% to 82.20% at 2 mg/cm(2) dose, D. consolida (48.92%) and T. mucroniferum (45.02%) also exhibited antifeedant properties at dose as low as 0.5 mg/cm(2). In stomach posion effects studies, C. segetum was the most toxic extract with %74.24 mortality. It was followed by D. consolida and T. mucroniferum with 70.53% and 67.04% mortality, respectively. Dose-mortality studies with C. segetum showed that it was the most toxic extract with 0.35 mg/cm(2) LC50 and 3.85 mg/cm(2) LC90 values.