Populations and samplesWorking age group, for example, used in the studies are divided into two groups: 1. farmers. Those occupations in agriculture, planting vegetables, green leaves, and the task is about the use of pests, chemical protection removal onyado district, amphur Muang kamphaeng Saen district, Amphoe Nakhon chaisi, Amphoe Sam phran, Amphoe Don toom district, and phutthamonthon in Nakhon Pathom province, 2. the different types of leaves and green vegetables such as kale and spinach Guangdong. Vegetables grown in the province of Nakhon Pathom, the slug, etc., which are collected to analyze the quantity of chemicals to prevent and get rid of the pest residues in green leaves.
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