The emergence of resistance insect can be caused by several factors, such as frequency of application, the use of a single insecticide for a long time, and improper dose or concentration of application. According to Sajali (2011), the use of synthetic pesticides and fertilizers in Garut are relatively high in the early part of the planting season. Local farmers reported that profenofos synthetic insecticide has been applied since 20 years ago, with an application interval of 7 - 10 days.