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Well, I am grateful someone is looking out for our long-term mental health (Starbucks I mean in this case).

“When smallholder farmers get [leaf rust]” made me wonder just how this is spread, the air? Soil? Cross contamination from tools and people who come in contact with the crop? When I read that I thought of large greenhouses and extra caution around soil contamination (thinking small local scale, gotta start somewhere)Not sure if it would be enough to prevent it though.

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Hi Scott, great questions! I did a quick look and found this site: https://horticulture.ahdb.org.uk/knowledge-library/symptoms-and-mechanisms-of-spread-and-the-life-cycle-of-rust-pathogens

which says "Rust spores are spread locally via air currents and water splash and can be wind-blown over longer distances," among other ways including spreading in the soil as well. Definitely seems like a worthy adversary to overcome. I hope brilliant minds find a way!

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