In the current situation, the use of chemical pesticides is difficult to avoid. Therefore, the use of chemical pesticides is increasing every year, which is evident from the figures in 2554 were imported fertilizers and other chemicals, including 6.3 million tonnes worth 93,844 million baht separate agricultural chemicals. 164,383 tonnes, worth 22,044 million baht to most herbicides percentage 68.2 (http://www.oae.go.th 18 Mar 2558, online).
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