Study the effects of using chemical pesticides, farmers in the district tiger Khukhan district of Si Sa Ket. the purposes of this study were : 1) to examine the farmers in the district tiger Khukhan district of Si Sa Ket 2) to examine effects of chemical pesticides that affect the economy, society and environment of the District Farmers tiger Khukhan district of Si Sa Ket. 3) To propose ways for farmers to use chemical pesticides, the details of how to conduct research. The period of study during the period. November-December 2557 by collecting data. Which divides information into two data: 1) primary data. To study the conditions and the structure of the farmers in the district tiger district Khukhan offenses and 2) tertiary massacres. Import data from the Community House Tiger Khukhan district of Si Sa Ket and research papers related to research from the University Library, copyrights and document searching online articles and so on.