Application of toxicological compatibility of sweet flag and nirgundi extract against cotton strainer, Dysdercus koenigii Fabr. (Hemiptera: Pyrrhocoridae) on okra, Abelmoschus esculentus

Abstract

The field experiment was laid down in randomized block design (RBD), three treatments, each treatment replicated thrice and three botanical extractives and untreated control at Research farm of Fattepur village Kanpur Nagar affiliated to Department of Zoology, D.B.S. Collage, biopotency of sweet flag, Acorus calamus extract at 0.5, 1.0 and 2.0 per cent extract were tested against of nymphs and adults of cotton bug, Dysdercus koenigii Fabr. On okra, Abelmoschus esculentus Linn. (Moench) was found 73.33, 83.33 and 100.00 per cent mean mortality per cent respectively. It is followed by nirgundi or legundi, Vitex negundo leaves extract at the rate of 0.5, 1.0 and 2.0 per cent extract showed 73.33, 76.66 and 93.33 per cent mean mortality of nymphs and adults of D. koenigii Fabr. Respectively. Other treatments of Cinnamonum aromaticum extract showed in decreasing order of their efficacy i.e. 16.66, 23.33 and 33.33 mean mortality of bugs, respectively. This research work highlights various biorational botanical extractives that have some potential as controlling agent for nymphs and adults of D. koenigii Fabr.