Effects of Plant Crude-Extracts on the Cattle Tick (Boophilus microplus) Insecticidal Action I

Abstract

The ethanol crude-extracts from five plants species; Acanthus ebracteatus Vahl., Acorus calamus L., Annona squamosa L., Luffa acutangula Roxb., and Stemona collinsae Craib. having high larvicidal activity on cattle ticks, were in vitro bioassayed with the insecticidal activity on adult tick by dipping method. The 10% of ethanol crude-extract of Annona squamosa seeds had high insecticidal action. The corrected mortality of adult ticks after dipping at 48h were 100%, 100% and 92.50% in 10%, 5% and 2% of its crude-extract respectively. The 10% of ethanol crude-extracts of L. acutangula seeds had moderate toxicity. The crude-extract of A. calamus rhizomes and S. Collinsae roots showed low insecticidal activity, and the crude-extract from A. ebracteatus and A. squamosa leaves had very low insecticidal activity.