Acaricidal activity of Chrozophora oblongifolia on the two spotted spider mite, Tetranychus urticae Koch

Abstract

The acaricidal activity of Chrozophora oblongifolia (Delile) Spreng. (Euphorbiaceae) extracts collected from Dakhla Oasis, Western Desert of Egypt was examined against larvae and adult females of Tetranychus urticae Koch (Acari: Tetranychidae). Acaricidal activity-guided isolation of methylene chloride, ethyl acetate, butanol fractions resulted in separation and identification of phydroxybenzaldehyde (1), 3,5-dimethoxy-4-hydroxybenzaldehyde (2), scopoletin (3), amentoflavone (4), apigenin 7-O-β-D-glucopyranoside (5) and apigenin 7-O-β-D-[2",6"-bis(4-hydroxy-E-cinnamoyl)] glucopyranoside (6). The isolated compounds were identified by MS and NMR spectral analyses. The susceptibility of the larvae and adult females of T. urticae Koch to the tested isolated compounds revealed that apigenin 7-O-β-D-[2",6"-bis(4-hydroxy-E-cinnamoyl)] glucopyranoside (6) and apigenin 7-O-ß-D-glucopyranoside (5) isolated from butanol fraction (most effective fraction) exhibited a high degree of acaricidal activity using leaf-dipping technique against larvae after 7-days of exposure, respectively.

Efficacy of some Entomopathogenic Fungal Extracts and their Chemical Constituents as Alternative Bio-Pesticides against Onion Thrips, Thrips tabaci L.

“…Entomopathogenic fungi considered to be a rich source of secondary metabolites (Gibson et al, 2014). The insecticidal activity of any entomopathogenic fungi extract depends upon their chemical contents (Mostafa et al, 2017).…”

Exploring the antimicrobial potential: Chrozophora rottleri battle against Staphylococcus aureus multidrug resistance pathogen

“…The flasks have been included with aluminum foil and allowed to face in a darkish for seventy-two hours for extraction. These extracts have been filtered and the filtrate changed into evaporated to dryness in heating plate [26] Preliminary phytochemical screening Ethyl acetate of Chrozophora rottlerin was subjected to qualitative chemical analysis. The various chemical test was performed on this extract for the identification of Mayer's, Wagner's, Molich's, Fehling's, Benedict's, Drangendorff's, Test for flavonoids, Test for acid, [27] .…”