The article addresses your point about the drug trade:
"Stories like this are unfolding in industries across Mexico as criminal groups branch out far beyond drugs. Cartels have siphoned millions of dollars’ worth of fuel from Mexican state oil company Petróleos Mexicanos or Pemex in recent years; they steal cargo and pilfer lumber. The tentacles of organized crime extend even into Mexico’s avocado growing regions, where gangs extort farmers and hijack loads of the green fruit."
"Stories like this are unfolding in industries across Mexico as criminal groups branch out far beyond drugs. Cartels have siphoned millions of dollars’ worth of fuel from Mexican state oil company Petróleos Mexicanos or Pemex in recent years; they steal cargo and pilfer lumber. The tentacles of organized crime extend even into Mexico’s avocado growing regions, where gangs extort farmers and hijack loads of the green fruit."