Transmissibility of Fusarium moniliforme in maize seeds under different exposure periods
DOI:
https://doi.org/10.20873/jbb.uft.cemaf.v9n3.cardosoKeywords:
germination, incidence, sanityAbstract
Fusarium moniliforme is the main pathogen associated with corn seeds in Brazil. It is considered one of the main responsible for the deterioration of seeds, death of seedlings, root rot, stem rot and ear and grain rot. The objective of the present study was to evaluate the transmissibility of the Fusarium moniliforme fungus in corn seeds under different periods of exposure (0, 24, 48 and 72h). The experimental design had five replications and four treatments for each factor evaluated, adopting a completely randomized design. The fungus was obtained from the mycological collection of the Laboratory of Phytopathology of the Centro Universitário Católica do Tocantins and they were inoculated by depositing them on the fungus mycelium. The seed health test and the paper roll germination test were used. The exposure time significantly influenced (p <0.05) the incidence of the fungus, so that, at 48 hours, the pathogen had already infested 100% of the seeds. The germination rate was negatively influenced by the presence of the fungus, however, seeds exposed to the pathogen for 24, 48 and 72 hours showed statistically similar germination rates (p> 0.05). It is concluded that the minimum period of 24 hours of contact of maize seeds with Fusarium moniliforme was sufficient for the occurrence of infection, reducing the germinative performance of seed lots.
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