Fusiform rust, caused by the fungal pathogen Cronartium quercuum f.sp. fusiforme, is one of the most economically devastating pine diseases across the southeast leading to lost timber value and possible pine mortality. Native to the southeastern US, it can affect several southern pine species, but it is most damaging on loblolly pine (Pinus taeda) and slash pine (P. elliottii). This disease causes galls to develop on pine stems and branches with characteristic orange spores appearing in the spring. Fusiform rust needs both pine and oak species to complete its life cycle. Hazard maps can determine regional disease pressure and be used to make management decisions. Check out this new study from Lim-Hing et al. where they enhance fusiform rust hazard maps by incorporating host genotype and climate!
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