Agronomists at the University of Arizona said hemp grown in two counties in the state suffered symptoms of root-crown rot, which can kill plants. Researchers identified the fungus-like pathogen, which prefers damp environments and infects a range of agricultural crops, as the cause of some hemp crop losses in Yuma and Graham counties. The scientists said regular irrigation and effective drainage are keys to preventing root-crown rot invasion. Arizona hemp farmers cut fields drastically in 2020, dropping to 1,130 acres from 5,430 planted in 2019, when the crop recorded a failure rate of about 25%.
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