Keefektifan Bioinsektisida Asap Cair Tongkol Jagung Terhadap Walang Sangit (Leptocorisa oratorius F.) Pada Tanaman Padi (Oryza sativa L.)

Febriawan, Diky (2022) Keefektifan Bioinsektisida Asap Cair Tongkol Jagung Terhadap Walang Sangit (Leptocorisa oratorius F.) Pada Tanaman Padi (Oryza sativa L.). Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

This study aimed to determine the effectiviness of corncob liquid smoke as a bioinsecticide in controlling the pest rice ear bug (Leptocorisa oratorius F.) on rice plants (Oryza sativa L.). The research was conducted from May to September 2022, at The Plant Protection Laboratory, Biosciences Laboratory Jember State Polytechnic and farmer’s land in Balung North Village, Jember Regency. Laboratory research examines the bioactive compounds of 3 rd grade corncob liquid smoke and the toxicity of bioinsecticides. The treatment of corncob liquid smoke was compared with synthetic insecticides with the active ingredient fipronil as a positive control, using the Mann Whitney test. Observations included the population of pest rice ear bug, the intensity of damage, and the weight of dry rice paddies per plant clump. The results of the GCMS analysis showed that 3 rd grade corncob liquid smoke contained 49 compounds that were detected by mass spectrometer. The bioactive compound as an antifeedant with the highest concentration was Acetic Acid of 11 %. The toxicity of LC50 and LC95 were 1 % and 7 %, respectively; Corncob liquid smoke with LC95 toxicity is more effective in reducing the pest population and intensity of damage; The average weight of dry paddy rice was 63 grams per plant clump (10,08 t/ha), more than the fipronil treatment with an average of 55 grams per plant clump (8,79 t/ha).

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