Pustaka Ilmiah Universitas Padjadjaran

Abstrak

The Effect of Barringtonia asiatica I. (Kurz) (Lecythidaceae) Seed Extract on Spodoptera litura Fabricius (Lepidoptera: Noctuidae)

Barringtonia asiatica (Lecythidaceae) seed extract has insecticidal activity, however it effect on Spodoptera litura (Lepidoptera: Noctuidae) is not obtained yet. The effect of B. asiatica seed extract on S. litura mortality and oviposition were tested at Pesticide and Application Technic Laboratory, Plant Protection Department, Agriculture Faculty, Universitas Padjadjaran, Jatinangor, during December 2010 to March 2011 (700 m above sea level). Experiment on toxicity test consisted of treatment: B. asiatica seed extract at concentration of 0.05%; 0.10%; 0.21%; 0.42%; 0.85% and control. Each of treatment was replicated three times. Treatment was done to get LCso, LTso analyzed by probit analysis, and also determine the leaf area of feed consumed, weight and time of growth on S. litura larvae were analyzed by ANOVA followed by Duncan multiple range test. The effect of B. asiatica seed extract on S. litura adult oviposition was done by spraying extract at concentration of 0.11%; 0.25%; 0.54% (equal with LC25, LCso and LC75) and control on taro leaf. Data oviposition test were analyzed by ANOVA and followed by Duncan multiple range test. The result showed that B. aslatica seed extract were toxic on S. litura larvae with LC50 value at 12 days after application of 0.25%. Beside toxic, extract at concentration of 0.85% inhibit feeding activity (antifeedant), reduce weight and extend time of growth on S. litura larvae. B. asiatica seed extract treatment at concentration of 0.54% (equal with LC75) inhibited oviposition of S. litura adult.