The Toxic Effect of Essential Oil from Waste Cinnamon (Cinnamomum burmanii (Nees & T. Nees) Blume.) Leaf to Control Helopeltis antonii Signoret in Cocoa Plants in Vitro

Abstract

The toxic effect of essential oil from waste  cinnamon leaf (Cinnamomum burmanii)  against pests of cocoa fruit Helopeltis antonii (Hemiptera; Miridae),  has been done in Green House, Research Station Spice and Medicinal Plants, Laing Solok, West Sumatra in April to May 2016. The experiment aimed to determine repellant and lethal  concentrations of essential oil from waste s cinnamon leaf (C. burmanii) for H. antonii. There were 5  treatments  arranged in Complately Randomized Design with 4 replications. The treatments tested were essentialoil concentration f  (0.05 ml/tube, 0.1 ml/tube, 0.2 ml/tube and 0.5 ml/tube) and control. The results showed that the effective repellent concentration were 0,05 ml/tube and 0,1 ml/tube which repelled  H. antonii  0,03 % . The effecive lethal concentration was  0,05 ml/tube which killed  H. antonii  57,50 %. Concentration used was  highly  toxic which killed l H. Antonii within  six hours so of the repellent nature was notobserved.