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

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.

Bazı bitkisel yağların şeftali yeşil yaprak biti Myzus persicae (Sulzer, 1776) (Hemiptera: Aphididae)’nin yaşam çizelgesi parameterleri üzerindeki etkileri

“…Callosobruchus chinensis L., 1758 (Coleoptera: Chrysomelidae) was found to be removed from the environment by the powder extracted from this plant (Li et al, 2008). Ali & Mohamed (2018) determined the effect of B. nigra seeds on Spodoptera littoralis Boisduval, 1833 (Lepidoptera: Noctuidae). It was reported that the seeds have the ability to prevent feeding on the harmful species.…”

“…In our study, B. nigra EO, which is used against green peach aphid, was found to have some toxicity, especially at high concentrations, although less than other oils and it is suggested that it may be effective against this type of pest. Ali & Mohamed (2018) determined the effect of B. nigra seeds on Spodoptera littoralis Boisduval, 1833 (Lepidoptera: Noctuidae). It was reported that the seeds have the ability to prevent feeding on the harmful species.…”