Antifeedant effect of Brassica nigra seeds against cotton leafworm Spodoptera littoralis and its potential antibacterial activity

Ahmed M. H. Ali; Emad Mohamed Abdallah

doi:10.30574/gscbps.2018.5.2.0110

Authors

Ahmed M. H. Ali Department of Zoology and Entomology, Faculty of Science, Assiut University, Assiut, Egypt.
Emad Mohamed Abdallah Department of Laboratory Sciences, College of Sciences and Arts at Al-Rass, Qassim University, Saudi Arabia.

DOI:

https://doi.org/10.30574/gscbps.2018.5.2.0110

Keywords:

Antifeedant, Brassica nigra, Antibacterial, Spodoptera littoralis

Abstract

Water extract of mustard seeds (Brassica nigra L.) at 40, 20 and 10% concentrations were applied to evaluate the bioactivity of mustard seed extract against the 4th instar larvae of cotton leafworm Spodoptera littoralis. Increasing concentration of mustard extracts exhibited anti-feedant activity. Antibacterial potential of mustard seeds was determined using the disc diffusion test against 10 bacterial strains; Aqueous and acetone extracts showed very weak or no antibacterial activity ranging from 6.0 to 7.75 mm zone of inhibition (ZI), 6.0 mm is the diameter of the blank disc and means no activity; The methanol extract showed varied degrees of weak antibacterial activity (ranging from 6.5 to 8.75 mm ZI). B. nigra could be a good source of insect antifeedant agents.

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