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Robusta supplies are also set to shrink after plantations in Vietnam, the largest producer of that variety, also faced both drought and heavy rainfall.

The cost of Robusta beans, meanwhile, hit a fresh high in September.

Scientists, including those from Imperial College London, University of Oxford and CABI, have 'turned up the heat' on how repeated outbreaks of coffee wilt disease threatened arabica and robusta varieties of our favourite daily coffee brew.

The scientists confirm the presence of genetically differentiated lineages with different host-specificity for arabica and robusta coffee and show that the fungal pathogen F. xylarioides repeatedly took up "horizontally transferred" segments of DNA from a related fungal Fusarium taxa which contributed to successive outbreaks of the disease.

Rice fields were lost; fish and shrimp died; and tons of robusta coffee beans were rendered unsalvageable, leading to a near 50-year high in price according to the International Coffee Organization.