Susceptibility of Spodoptera littoralis (Boisduval) larvaeto magnetism and some biorationale insecticides

Authors

1 Plant Protection Research Institute, Dokki, Giza, Agriculture Research Center, Egypt

2 Entomology Department, Faculty of Science, Cairo University, Egypt

3 Zoology Department, Faculty of Science, Mansoura University, Egypt

Abstract

The Egyptian cotton leafworm, Spodoptera littoralis, is a dangerous pest to many economic crops, including vegetable hosts such as tomato, cucumber and potato. In this study, extracts of tomato, cucumber and potato leaves were tested against the fourth-instar larvae of S. littoralis. Moreover, exposure to nanosilica, chlorfluazuron (IGR) or a magnetic field was also tested. The results explained that tomato leaf extract was the most toxic agent compared with cucumber and potato leaf extracts, nanosilica, and chlorfluazuron. When the LC50 of each extract was exposed to different periods of a magnetic field (10, 20 & 30 min), there was a positive correlation between the period of exposure and the toxicity. In addition, the binary mixture of each plant leaf extract and nanosilica or chlorflazuron (1:1), at the level of the LC25, revealed a synergistic effect, which was the highest for tomato leaf extract and chlorfluazuron.

Keywords

Mansoura Journal of Biology
Volume 63, Issue 2
June 2023
Pages 47-52

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