Aspectos de la biología de colletotrichum musae (berk. & curt.) V. Arx y fusarium pallidoroseum (cooke) saccardo, agentes causales de la pudrición de la corona de los bananos (musa sp.) En cuba
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Abstract
The effect of temperature on conidial germination, colony growth, sporulation in vitro, incubation period and development of crown rot on artificially inoculated Giant Cavendish banana fruits was studied. It was obtained quadratic regression equations to fit the values of germination and colony growth as a function of temperature and to determine the optimal temperature for germination and colony growth. The optimal temperature for F. pallidoroseum and C. musae conidial germination and colony growth was 27 °C. At temperatures below 15 °C, germination and colony growth were strongly inhibited. Crown rot development on artificially inoculated fruits, was strongly delayed at temperatures below 15 °C with regard to development on fruits incubated at 25-27 °C. Conidia of both species requires the presence of free water laminae for germination. C. musae growth abundantly on Saboreaud agar, PDA y and malt agar; but on malt agar the sporulation was higher. C. musae growths and sporulates optimally at temperatures in the range de 25-30 °C in pH on the range of 5-6. The results show the importance of fruit refrigeration at temperature between 13-14°C as short as possible after harvesting and boxing.
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References
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