Evaluation of Ginger (Zingiber Officinale Roscoe) Rhyzome Extract against Whitefly (Bemisia Tabaci Genn.) on Tomato (Lycopersicon Lycopersicum L.)

Abstract

Field experiments were conducted during the dry seasons of 2010 and 2011 to evaluate ginger (Zingiber officinale Roscoe) rhyzome against Whiteflies (Bemisia tabaci Genn.) population on tomato. (Lycopersicon Lycopersicum L.) at the Department of Crop Protection Student teaching Plot, Institute for Agricultural Research, Ahmadu Bello University, Zaria. Treatment consist ginger extract, sherpa plus and untreated control, each replicated four times. Experiment was laid out in a randomized block design. Another experiment was conducted during the 2012 and 2013 dry seasons to determine the minimum effective dosage of ginger. (Zingiber officinale Roscoe) found to be effective .Ginger rhyzome was effective at 15% concentration against whitefly population.  The^: performance was good as that of a conventional chemical insecticide, Sherpa plus® (Cypermethrin and dimethoate). In another trial with different concentrations of extract of ginger rhizomes equivalent of 10%, 7.5%, 5.0% and 2.5% w/v respectively were tested against whitefly on tomato, their efficacy in reducing whitefly population on tomato increased with increase in concentration of extract. The efficacy of the aqueous extracts at 100 g/litre of ginger rhizomes was significantly higher P <0.05 than lower concentrations.