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In page Rust (fungus):

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Rusts are among the most harmful pathogens to agriculture, horticulture and forestry. Rust fungi are major concerns and limiting factors for successful cultivation of agricultural and forest crops.[citation needed] White pine blister rust, wheat stem rust, soybean rust, and coffee rust are examples of notoriously damaging threats to economically important crops.[1] Climate change may increase the prevalence of some rust species while causing others to decline through increased CO2 and O3, changes to temperature and humidity, and enhanced spore dispersal due to more frequent extreme weather events.[2]