Target insects could become resistant because of selection of population of insect having effective mechanism of detoxyfication of toxicant so that the resistant population in the next generation will grow uncontrollable with initially effective insecticide. Detoxyfication of toxic compound by insects may occur by various enzymes available in the insect body such as oxidation enzyme of polysubstrate mono oxigenase (PsMO), reductase, hydrolase, glutathione S-transferase, and conjugation reactions (Matsumura, 1985; Pittendrigh et al. 2008; Hollingworth and Dong, 2008; Dono et al. 2010). Gunning and Moores (2001) reported that insect resistance to organophosphate compounds may occur through insensitivity of the common molecular target site acetylcholinesterase which breaks down the neurotransmitter acetylcholine.