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Author of new study calls the myth that Robusta coffee is climate resilient a "myth".

In an interview, the lead author of the study called the widespread belief that Robusta coffee was more resistant to climate change than other varieties an "internet myth" that was based on flawed studies that ignored the crop's vulnerability and its inability to tolerate drought.

Robusta coffee is often viewed as a cheap filler when compared to arabica beans. However, each year, millions of bags are shipped worldwide, with the majority coming from Brazil and Vietnam.

The findings published in the Wiley journal Sustainable Development late Thursday are a challenge to those who advocate robusta as an alternative way of coping with 'climate change' in the coffee industry. Any reassessment on robusta's climate resilience will have implications for farmers, traders, and consumers as the demand for robusta increases around the globe. A Vietnamese coffee official said earlier this month that adapting climate change is no longer an issue for the future but a 'urgent necessity' to protect output. The robusta plant's high heat tolerance is often cited by the media, farmers, and researchers as the "coffee industry"s answer to climate change. However, a new paper published in Sustainable Development has found that these previous assessments are at best provisional. The paper cited errors in research, such as treating irrigated farmland as the best growing area. Aaron Davis, the lead author of the paper and senior research leader for crops and global changes at the Royal Botanic Gardens in Kew, said that the "internet myths" about Robusta being more resilient to climate change emerged a decade or so ago.

Davis stated, "I found that it was troubling that some people were not interpreting science correctly and were advocating robusta to save the coffee industry from climate change." "Robusta can tolerate more heat than arabica but is not drought-tolerant."

The paper concluded that Brazil, Vietnam, and India do not have the right climate to grow robusta. It recommended irrigation as a way to make sure the plants get enough water to be profitable.

Previous?studies sought to highlight the robusta's resistance, suggesting that the beans were more resistant to a?drought. They also suggested that they are a boon to farmers.

The paper stated that any expansion of robusta production must take into account the crop's vulnerability. It added that "growers" in certain regions already face serious problems with water availability for irrigation.

The study concluded that relying solely on irrigation to ensure robusta's survival and profitability is fraught with inherent dangers.

Davis stated that "the global coffee supply must undergo major structural and systematic changes if it is to survive for the long-term."

(source: Reuters)