Control of Major Insect Pests for Pummelo cv. Tubtim Siam

Abstract

Testing on insect pests control technology ofpummelo cv. Tubtim Siam was undertaken at the orchard located in Kong–Noi Distric, Pak Phanang, Nakhon Si Thammarat province from 2011-2013. Phyllocnistis citrella Stainton and Scirtothrips dorsalis Hood. were the major insect pests found in this study. The experiment was devided into 8 treatments with 4 replications namely, (1) petroleum spray oil (SK99 Enspray 83.9%) 60 ml/20 liters of water (2) azadirachtin (Advantage 0.1 W/V SL) 100 ml/20 liters of water, (3) imidacloprid (Confidor 10 SL 10% SL)10 ml/20 liters of water, (4) clothianidin (Dantaosu 16 % SG) 5 g/20 liters of water, (5) carbosulfan (Combo 20% W/V EC) 20 ml/20 liters of water, (6) abamectin (Shosmac 1.8% W/V EC) 30 ml/20 liters of water, (7) azadirachtin + petroleum spray oil) 50+30 ml/20 liters of water and (8) untreated control. The clothianidin(Dantaosu 16 % SG) 5 g/20 liters of water and imidacloprid (Confidor 10 SL 10% SL)10 ml/20 liters of water showed the highest performance to control Phyllocnistis citrella Stainton and Scirtothrips dorsalis Hood The efficacy of inset pest control was found when spraying the chemicals 7 days interval. The insecticides were not affect to pummel plants but decreased number of pummelo’s natural enemies. It was significantly different on the number of insect pests which found in all treated plots less than those of untreated control.