Colletotrichum truncatum explained

Colletotrichum truncatum is a fungal species and plant pathogen on soybeans.^[1]

They are endophytic on Euphorbia hirta with another plant pathogen Uromyces euphorbiae (in the Pucciniaceae family and Pucciniales order).^[2]

Symptoms

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.

Infected seeds appear discoloured with brown or grey staining or dark flecks.

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. 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.

External links

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Notes and References

Book: Bennett. J. Michael. Rhetoric. Emeritus. Hicks. Dale R.. Naeve. Seth L.. Bennett. Nancy Bush. The Minnesota Soybean Field Book. 2014. University of Minnesota Extension. St Paul, MN. 83. 21 February 2016. https://web.archive.org/web/20130930151502/http://www1.extension.umn.edu/agriculture/soybean/docs/minnesota-soybean-field-book.pdf. 30 September 2013. dead.
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 . Infection by Uromyces euphorbiae: a trigger for the sporulation of endophytic Colletotrichum truncatum on the common host Euphorbia hirta . Mycological Progress . 2017 . 16 . 10 . 941–946. 10.1007/s11557-017-1338-5 . 2017MycPr..16..941D . 255305196 .
2018. Plantwise Knowledge Bank Anthracnose on soybean. live. https://web.archive.org/web/20200626123629/https://www.plantwise.org/KnowledgeBank/pmdg/20197800002 . 2020-06-26 . 2020-06-24. Plantwiseplus Knowledge Bank. 10.1079/pwkb.20197800002. Chilasa. S. L.. Masangwa. J. I. G.. Shaibu. Y. A.. Pest Management Decision Guides. free.