Are species used as green manure susceptible to Sclerotium rolfsii?
DOI:
https://doi.org/10.30612/agrarian.v15i55.15500Keywords:
Crotalaria juncea, Cover crops, Necrotrophic, White moldAbstract
Sclerotium root rot, caused by the cosmopolitan fungus Sclerotium rolfsii, has a potential for high damage. The use of green manure is an alternative to induce suppressivity. The objective was to evaluate the susceptibility of green manures to S. rolfsii. Crotalaria juncea, Crotalaria spectabilis, Cajanus cajan, Dolichos lablab, Neonotonia wightii, Raphanus sativus, Stizolobium aterrimum and Stizolobium deeringiana were cultivated in pots and inoculated with S. rolfsii. After 15 days, survival, height, shoot and root dry mass, and reduction percentages were evaluated. The variables were analyzed with the t test at 5% probability and the reduction percentages compared by the Duncan test 5%. Crotalaria juncea showed 100% survival, being resistant to the disease during the period evaluated. The species Crotalaria spectabilis, Cajanus canja, Dolichos lablab, Neonotonia wightii, Raphanus sativus, Stizolobium aterrimum, Stizolobium deeringianna were susceptible to the pathogen, and sowing in infested soils is not recommended.
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