The Effects of Ultraviolet B on The Efficacy of Bacillus thuringiensis var. kurstaki Formulations Against Tobacco Armyworm, Spodoptera litura (Lepidoptera: Noctuidae)

Sukirno, Sukirno and Sumarmi, Siti and Soesilohadi, R. C. Hidayat and Sudaryadi, Ign. and Purwanto, Hari and Aldawood, Abdulrahman Saad (2023) The Effects of Ultraviolet B on The Efficacy of Bacillus thuringiensis var. kurstaki Formulations Against Tobacco Armyworm, Spodoptera litura (Lepidoptera: Noctuidae). HAYATI Journal of Biosciences, 30 (1). pp. 17-27. ISSN 19783019

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Abstract

Tobacco armyworm (Spodoptera litura Fab.) is one of the major insect pests of crops in Indonesia. The management of this pest still depends on the use of chemical insecticides. The use of bio-insecticides, such as Bacillus thuringiensis (Bt.), are known to be alternatives, but it easily degraded by sunlight. This research aimed to study the effects of UV B on Bt. pathogenicity and to explore plant-based additives as UV B protectants for Bt. against armyworm. Thirteen plant extracts were screened based on their UV spectra absorbencies using UV spectrophotometry. The extracts, namely cloves, Jicama, Celebes pepper, turmeric, and Moringa, then used for the formulations of Bt. and exposed under UV B lights for 0, 72, and 144 h. After exposure to UV B, Bt. formulations were tested for bioassay against one-day-old 1st and one day old 2nd larval instars of tobacco armyworm. The result indicated that at 72 and 144 h of UV B exposures, the Bt. added formulations were signifcantly different compared to Bt. alone. At 72

Item Type: Article
Additional Information: Cited by: 1; All Open Access, Gold Open Access
Uncontrolled Keywords: Bacillus thuringiensis,UV Protectant, armyworm, Indonesia
Subjects: Biology
Divisions: Faculty of Biology > Doctoral Program in Biology
Depositing User: Rusna Nur Aini Aini
Date Deposited: 29 Nov 2024 06:17
Last Modified: 29 Nov 2024 06:17
URI: https://ir.lib.ugm.ac.id/id/eprint/9658

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