amounts of rain and sunshine in the right order. it's the goldilocks of crops that likes things just right. >> not enough rain. too much sunshine, bad fruit. >> yes. too much sunshine produces bad fruits. >> reporter: another farmer, another farm, another problem. this fine white powder is produced by the stem bore beetle which sam massa says is just one of the pests and diseases which have come up from the valleys as the weather has warmed. >> 10 years back it was not here. most of the farms have been destroyed completely by this. >> reporter: coffee yields have been dropping, and prices are up by as much as 30% in some areas since 2015. more than just a consumer's morning pick-me-up is threatened. the farmers are caffeine dependent for another reason-- from picking the berries, to processing them, to drying and sorting the beans and getting