Antifeedant and larvicidal activities of Acalypha fruticosa Forssk. (Euphorbiaceae) against Plutella xylostella L. (Lepidoptera: Yponomeutidae) larvae

Abstract

Antifeedant and larvicidal activities of hexane, chloroform and ethyl acetate extracts of Acalypha fruticosa Forssk. Leaves were studied using leaf disc no-choice method against third instar larvae of Plutella xylostella L. Chloroform extract showed maximum antifeedant activity of 92.8% at 5% concentration with a LC 50 value of 1.86%. Nine fractions were collected from the chloroform extract (30 g) by silica gel column chromatography, among which the seventh fraction (eluted by 100% ethyl acetate) recorded maximum antifeedant activity (84.3%) at 1000 ppm concentration with a LC 50 value of 385.7 ppm against the third instar larvae of P. xylostella. Preliminary phytochemical analysis of this effective fraction showed the presence of terpenoids, tannins, coumarins, anthraquinones and saponins.

Phytochemical composition and antifeedant activity of five Vincetoxicum taxa against Spodoptera littoralis and Leptinotarsa decemlineata

“…Various secondary metabolites including alkaloids [7,36], tannins [37], terpenes [38], essential oils [39] and phenolics [36] were reported as potent insect antifeedants.…”

Characterization and biotoxicity of Hypnea musciformis-synthesized silver nanoparticles as potential eco-friendly control tool against Aedes aegypti and Plutella xylostella

“…In latest years, a number of other plants have been reported as sources of metabolites toxic against the diamondback moth. Trindade et al (2008) have proved the toxicity of ethanol extracts of stem bark, fruits, and roots of Aspidosperma pyrifolium on P. xylostella larvae, while Lingathurai et al (2011) have studied the larvicidal and antifeedant activities of hexane, chloroform and ethyl acetate extracts of Acalypha fruticosa against P. xylostella. Recently, Paulraj et al (2014) have reported that two natural alkaloids (i.e.…”

Larvicidal and antifeedant activity of some indigenous plants of Meghalaya against 4th instar Helicoverpa armigera (Hübner) larvae

“…The insecticidal activity of plants is attributed to the presence of various phytochemical groups (Kabaru and Gichia, 2001) and the occurrence of more than one major class of phytocompounds is responsible for the different modes of action of plant extracts against the target pests (Park et al, 2002;Lingathurai et al, 2011). The extract of the four plants, namely, G. fragrantissima, L. camara, L. cubeba and P. kesiya, tested positive for phenolic compounds, flavonoids and tannins.…”