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All Journal HAYATI Journal of Biosciences Journal of Tropical Biodiversity and Biotechnology
Ignatius Sudaryadi
Enthomology, Biology Faculty, Gadjah Mada University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Immunology & microbiology

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Effectivity of Spodoptera littoralis Nucleopolyhedrovirus (SpliMNPV) and Natural Additives Mixtures against Spodoptera litura Fab. (Lepidoptera: Noctuidae) on Cabbage Plants Sukirno Sukirno; Bellia Alda Ayu Prasetya; Aryo Seto Pandu; Siti Sumarmi; Hari Purwanto; Ignatius Sudaryadi; Suparmin Suparmin; RC Hidayat Soesilohadi
Journal of Tropical Biodiversity and Biotechnology Vol 7, No 2 (2022): August
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.71134

Abstract

Armyworm (Spodoptera litura Fab.) is one of the agricultural pests that can cause huge losses especially for Indonesian farmers because it is damaging various crops, especially cabbage (Brassica oleifera L.). Spodoptera littoralis nucleopolyhedrovirus (SpliMNPV) is one of the biological agent which is effective for the management of the Spodoptera litura. However, because of UV radiation it easily degraded when applied in the fields. This study was aimed to determine the effectivity of several indigenous plants for UV protectant of SpliMNPV for controlling armyworm at greenhouse scale. Extracts of 2% (w/v) of turmeric rhizome, red betel leaf, moringa leaf, and clove flower, were formulated with SpliMNPV and sprayed evenly onto two-month- old cabbages. The experiment used five replicates with six periods of sunlight exposures (0, 1, 3, 5, 7, and 15 days). A commercial product of deltamethrin was used as a comparison. The sprayed leaves were then used as a bioassay by using 25 individuals of one day old 1st larval instar by five replicates. The results showed that the turmeric additive was the most effective as a UV protectant and effectively prolonged the half-life of SpliMNPV to 4.12 days, while for clove, moringa leaf, and red betel was 2.48, 2.15, and 2.28 days, respectively.
The Effects of Ultraviolet B on The Efficacy of Bacillus thuringiensis var. kurstaki Formulations Against Tobacco Armyworm, Spodoptera litura (Lepidoptera: Noctuidae) Sukirno Sukirno; Siti Sumarmi; R.C. Hidayat Soesilohadi; Ign. Sudaryadi; Hari Purwanto; Abdulrahman Saad Aldawood
HAYATI Journal of Biosciences Vol. 30 No. 1 (2023): January 2023
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.30.1.17-27

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 h exposure against the 2nd larval instar, the larval mortality of tobacco armyworm on the second day of observation on Bt. formulated with Celebes pepper and turmeric was 97.3 and 80%, respectively, whereas, at 144 h exposure, the mortality was 96 and 89.3%, respectively. This study concluded that Celebes pepper and turmeric extracts were the potential to be used as the Bt. protectants against UV B.
Co-Authors Abdulrahman Saad Aldawood Aris Setiawan Aryo Seto Pandu Bellia Alda Ayu Prasetya Ekowati Purwandari Hari Purwanto Hari Purwanto R.C. Hidayat Soesilohadi R.C. Hidayat Soesilohadi Rusna Nur Aini Siti Sumarmi Siti Sumarmi Sukirno Sukirno Sukirno Sukirno Suparmin Suparmin