Climate change has affected Kenyan coffee production through unpredictable rainfall patterns and excessive droughts, making crop management and disease control a nightmare, a researcher said on Thursday.

Intermittent rainfall in the 2007/08 crop year, for example, caused a terrible bout of the Coffee Berry Disease that cut Kenyan output 23 percent to 42,000 metric tons as farmers were caught out by rains and did not protect their crop in time.

“We have seen climate change in intermittent rainfall patterns, extended drought and very high temperatures,” said Joseph Kimemia, director of research at Kenya’s Coffee Research Foundation (CRF).