Impact of Chlorantraniliprole Exposure on Nutritional and Physiological Responses of Lab‐Selected Susceptible and Resistant Populations of Spodoptera litura (Fabricius)

Journal of Applied Entomology, Journal Year: 2025, Volume and Issue: unknown

Published: April 20, 2025

ABSTRACT Spodoptera litura (Fabricius) (Lepidoptera, Noctuidae), known for its ravenous feeding habits, is a polyphagous pest with high reproductive rate, often developing resistance to most of the conventional insecticides, posing substantial management challenge. Chlorantraniliprole (CTPR) an anthranilic diamide insecticide, which widely used against lepidopteran pests, including S. . Understanding physiological and biochemical alterations associated CTPR crucial effective management. Our research aimed investigate overall impact on nutritional parameters, immunological responses in laboratory‐selected susceptible (Unsel‐Lab) resistant (CTPR‐Sel) populations. Results showed reduction parameters digestive enzyme activity, more pronounced decline CTPR‐Sel population. In contrast, detoxification activities (MFO, GST, EST, ACP AKP), along AChE, were significantly elevated, suggesting adaptive response exposure, population exhibiting stronger capacity. Antioxidant assay indicated increased SOD activity but decreased CAT both populations, reflecting oxidative stress. Immune markers, total haemocyte count, lysozyme phenoloxidase significant variations between two differential immune‐physiological adaptations. These findings highlight trade‐offs emphasise necessity integrated strategies mitigate development.

Language: Английский

8-Methoxypsoralen (8-MOP) Isolated from Ficus petiolaris (Moraceae) Has Insecticidal Activity against Spodoptera frugiperda

Agronomy, Journal Year: 2024, Volume and Issue: 14(8), P. 1827 - 1827

Published: Aug. 19, 2024

In this study, we tested the insectistatic and insecticidal effects of ethanolic extract stems bark Ficus petiolaris Kunth (Moraceae) in laboratory bioassays with an artificial diet against newly hatched larvae fall armyworm, Spodoptera frugiperda Smith (Lepidoptera: Noctuidae). The was evaluated at five different concentrations (500, 1000, 1500, 2000, 2500 ppm). ppm had strongest inhibitory on larval (89%) pupal (20%) weight as well highest mortality (80%). positive control, methyl parathion (Methyl Parathion®) 1%, eliminated 100% negative control (artificial diet) a only 5%. Chemical fractionation F. stem produced fractions FpR1-5, each which 250, 500, 750, 1250 ppm. FpR4 presented effect, reducing larva pupa by 35% 18%, while FpR2 90% pure 8-Methoxypsoralen compound extracted from fraction even more effective, S. 100 50% lethal concentration (LC50) 67.68 Our results indicate that showed toxic activity its strong low concentrations.

Language: Английский

Bioactivity of seed extracts from different genotypes of Jatropha curcas (Euphorbiaceae) against Spodoptera frugiperda (Lepidoptera: Noctuidae)

Florida Entomologist, Journal Year: 2024, Volume and Issue: 107(1)

Published: Jan. 1, 2024

Abstract The armyworm Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae) is the main pest that attacks corn, and it has acquired resistance to chemical insecticides. In this study, insecticidal insectistatic activity of hexanic, acetonic, methanolic, aqueous extracts four genotypes physic nut Jatropha curcas L. (Euphorbiaceae) seeds (Utim 1, Utim 2, Ahuehuetzingo, Ceprobi) against S. larvae was assessed. acetonic extract at 5,000 ppm 1 genotype, presented by decreasing weight gain 7 days 66.7 % 14 71.8 %, prolonged larval development 13 days, in addition causing pupal mortality 72 84 respectively. hexanic 2 showed with a 80 ppm. On other hand, Ahuehuetzingo genotype greater ppm, 100 pupae. Ceprobi 2,500 reducing 47.6 74.3 for 28.5 53.0 addition, caused 76 pupae, All concentrations phagostimulant effect on feeding insect larvae. J. seed can be explored as useful alternative agroecological control .

Language: Английский