Insecticidae Susceptibility of Spodoptera litura (FABRICIUS) (Lepidoptera : Noctuidae) Larvae Collected from Three Locations in Indonesia

Endo, Shozo; Sutrisno,; Samudra, I Made; NUGRAHA, Asep; Soejitno, J.; Okada, Tadatora

doi:10.1303/aez.24.309

Cited by 2 publications

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“…Tobacco armyworm has developed resistance against chemical insecticides. Many resistant tobacco armyworm strains have been found, for example, in India (Armes et al 1997), Pakistan (Ahmad et al 2007(Ahmad et al , 2008Ahmad and Mehmood 2015;Shad et al 2012), China (Huang et al 2019;Tong et al 2013), and Indonesia (Endo et al 1989;Fattah et al 2020). Table 1 shows that tobacco armyworm at the 1 st larval instar is very sensitive to Bt.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2022

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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.

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