Researchers have published a paper in the journal Sustainable Development that challenges the long‑standing notion that robusta coffee is a climate‑change savior for the industry. Aaron Davis, senior research leader of crops and global change at the Royal Botanic Gardens, Kew, and lead author of the study, told Reuters the idea of robusta’s superior resilience is “an internet myth” based on flawed analyses that ignored the crop’s vulnerability to drought.
Key findings of the study
The authors examined data from major producing regions, including Brazil, Vietnam and India, and found that many previous assessments treated irrigated farms as if they represented optimal growing conditions. In reality, robusta’s heat tolerance does not translate into drought tolerance; the plant requires substantial water to remain profitable. When irrigation is unavailable or too costly, yields can drop sharply.
“Robusta is more heat‑tolerant than arabica, but it is drought‑intolerant,” Davis said. The paper warns that relying on irrigation to sustain robusta production carries inherent risks, especially as water scarcity intensifies in key growing areas.
Implications for growers and the market
Robusta accounts for tens of millions of bags shipped worldwide each year, largely from Vietnam and Brazil, and its lower price point has made it a staple for many coffee blends. However, the study suggests that expanding robusta cultivation without addressing its water needs could jeopardize farmer profitability and the stability of the global coffee supply.
Industry observers have previously promoted robusta as a buffer against climate change, arguing that its heat tolerance would protect coffee output as temperatures rise. The new research calls for a reassessment of that strategy, urging producers, traders and policymakers to consider the crop’s full climate profile before making large‑scale investment decisions.
Calls for broader industry change
“The global coffee supply needs major structural and systemic change if it’s to survive over the long term,” Davis added. He recommends diversifying coffee varieties, improving water‑use efficiency, and investing in research that accurately reflects on‑ground conditions.
Vietnamese coffee officials have already emphasized that adapting to climate change is no longer a future concern but an urgent necessity to safeguard output. The study’s findings reinforce that message, highlighting the need for realistic adaptation plans rather than reliance on unproven myths.
As demand for robusta continues to grow, especially in markets seeking lower‑cost coffee options, the industry faces a pivotal moment. Stakeholders must weigh the benefits of heat tolerance against the undeniable challenges of water scarcity, ensuring that any expansion of robusta production is grounded in sound science and sustainable practices.
Original reporting: Appleton, WI News Feed (HLL/CB) — read the source article.
