Glyphosate is among the pesticides banned by the 4C standard but some farmer still used on their farms despite the warning issued by the extension service. Costs of the pesticides were not the main concerns but farmers continued to use them because of their positive personal experiences as well as friends' suggestions. However 4C extension procedures and agreement between 4C unit and farmers influenced the local coffee farm owners to stop the use of such pesticides. Some of them followed the suggestion of extension officers who came to randomly check their farms every 2 to 4 months because they need to continually maintain their 4C member status