Symptoms appear as dark red to black lesions on the lower surface of the leaves. They appear as sunken lesions surrounded by a raised brown-black border on the pods, petioles and stems. Very small black fruiting bodies of the fungus are usually visible in older lesions.[3]
Other symptoms include shedding of leaves, flower and pod abortion.[3]
Infected seeds appear discoloured with brown or grey staining or dark flecks.[3]
Management
Partners of the CABI-led programme, Plantwise including LUANAR recommend using certified, disease-free seed. If using saved seed, they recommend selecting seeds which are not shriveled mouldy or discoloured.[3] They also recommend rotating soybean with cereals such as maize and sorghum every 2–3 seasons and remove any diseased crop residue and bury any remaining material.[3]
^Bennett, J. Michael; Rhetoric, Emeritus; Hicks, Dale R.; Naeve, Seth L.; Bennett, Nancy Bush (2014). The Minnesota Soybean Field Book(PDF). St Paul, MN: University of Minnesota Extension. p. 83. Archived from the original(PDF) on 30 September 2013. Retrieved 21 February 2016.
^Carmo de Souza, Érica Santos do; Martins do Vale, Helson Mario; Pereira Carvalho, Rita de Cássia; Soares, William Rosa de Oliveira; Miller, Robert Neil Gerard; Dianese, José Carmine (2017). "Infection by Uromyces euphorbiae: a trigger for the sporulation of endophytic Colletotrichum truncatum on the common host Euphorbia hirta". Mycological Progress. 16 (10): 941–946. Bibcode:2017MycPr..16..941D. doi:10.1007/s11557-017-1338-5. S2CID255305196.
