ABSTRACT
Anthracnose is a disease that attacks the bean crop (Phaseolus vulgaris) and if not previously controlled results in losses of up to 100%. The objective of this study was to verify possible differences in seedplant transmission rates among races 65, 73 and 81 of Colletotrichum lindemuthianum isolated from bean seeds of the “Lider” cultivar. The seeds were inoculated by the water restriction technique in Mathur’s medium modified with sucrose at the osmotic potential –1.0 Mpa. One hundred infected seeds were sowed for each race, divided in 4 repetitions of 25 seeds per tray. Non-inoculated seeds were used as the control. The length of the individual plants was observed as well as the dry weight of each plot. The results indicate that there are differences in the transmission rates among races of C. lindemuthianum. The transmission rates were 75.85, 80.68 and 70.51% respectively for the races 65, 73 and 81. Infected plants showed smaller length of the root system without showing differences in the size of the aerial part nor in dry weight, in relation to the control.
KEY WORDS
Anthracnose; pathotypes; beans; seeds
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