<abstract xmlns="http://www.w3.org/1999/xhtml">

The current study evaluated the effect of microbial-derived insecticides (abamectin and spinosad), two microbials (<italic>Beauveria bassiana</italic> (Balsamo) Vuillemin, <italic>Bacillus thuringiensis</italic> Berliner), and three chitin synthesis inhibitors (CSIs) (chlorfluazuron, hexaflumuron and lufenuron) against <italic>Spodoptera frugiperda</italic> larvae. Spinosad and abamectin caused pronounced mortality against second larval instar of <italic>S. frugiperda</italic> using the leaf dipping method. Spinosad induced higher toxicity (LC50 = 4.01 mg/L) than abamectin (LC50 = 8.33 mg/L) one day after treatment. The treatments with <italic>B. bassiana</italic> and <italic>B. thuringiensis</italic> caused higher mortality of <italic>S. frugiperda</italic> larvae 7 days after treatment with LC50 values of 3.0 × 105 spores/ml and 8.2 × 106 cells/ml, respectively. In the case of the CSIs, hexaflumuron showed higher toxicity than chlorfluazuron and lufenuron with LC50 values of 0.01, 0.009 and 0.005 mg/L 3, 7 and 10 days after treatment, respectively.
</abstract>

The current study evaluated the effect of microbial-derived insecticides (abamectin and spinosad), two microbials (Beauveria bassiana (Balsamo) Vuillemin, Bacillus thuringiensis Berliner), and three chitin synthesis inhibitors (CSIs) (chlorfluazuron, hexaflumuron and lufenuron) against Spodoptera frugiperda larvae. Spinosad and abamectin caused pronounced mortality against second larval instar of S. frugiperda using the leaf dipping method. Spinosad induced higher toxicity (LC50 = 4.01 mg/L) than abamectin (LC50 = 8.33 mg/L) one day after treatment. The treatments with B. bassiana and B. thuringiensis caused higher mortality of S. frugiperda larvae 7 days after treatment with LC50 values of 3.0 × 105 spores/ml and 8.2 × 106 cells/ml, respectively. In the case of the CSIs, hexaflumuron showed higher toxicity than chlorfluazuron and lufenuron with LC50 values of 0.01, 0.009 and 0.005 mg/L 3, 7 and 10 days after treatment, respectively.

Comparative effect of biopesticides against the fall armyworm <italic>Spodoptera frugiperda</italic> (J.E. Smith)

Faculty of Agriculture, Al-Azhar University

Department of Pesticide Chemistry and Technology

Faculty of Agriculture, 21545-El-Shatby, Alexandria University

Hellenic Plant Protection Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

Comparative effect of biopesticides against the fall armyworm  (J.E. Smith)

The current study evaluated the effect of microbial-derived insecticides (abamectin and spinosad), two microbials (Beauveria bassiana (Balsamo) Vuillemin,...

Comparative effect of biopesticides against the fall armyworm Spodoptera frugiperda (J.E. Smith)

Pubblicato online: 18 lug 2024

Pagine: 75 - 84

Ricevuto: 04 nov 2023

Accettato: 20 giu 2024

DOI: https://doi.org/10.2478/hppj-2024-0007

© 2024 A.A.M. Atta et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.