Estudo da patogenicidade de Colletotrichum dematium VAR.TRUNCATA em soja

Abstract

Soybean cultivation has a multitude of diseases that affect its productive potential in all its phenological phases, the anthracnose, caused by the fungus C. dematium VAR. TRUNCATA is one of the major diseases of the crop, it occurs from the initial stage until the formation of the pods and is transmitted via seed. The objective of this work was to evaluate the incidence, morphology, seed transmission and severity of the damage in soybean seedlings caused by the different potentials of C. dematium inocula on cultivars TMG 7062, N 6909, NS 5909 RR, P955R51 from Soy. The experiment was conducted at the Phytopathology / Phytosanitary Laboratory of the Federal Technological University of Paraná, Câmpus Dois Vizinhos. At the beginning, the test of sanity of the seed method Blotter test, for the isolation of the fungus C. dematium, And evaluation of the sanitary quality of the lots of the cultivars studied was carried out. The characterization was carried out through mycelial growth in Mathur and BDA culture media and a. The production capacity of extracellular enzymes, proteases and cellulases by C. dematium in solid medium, seed-plaine transmission, inoculum potential assessment, and virulence test were evaluated. All cultivars showed somehow susceptible to C. dematium, with the cultivars NA5909RG and P95R51 being the most susceptible.