MOLD CAUSED BY Aspergillus flavus AND Penicillium spp. DURING STORAGE OF HUMID GRAINS IN DIFFERENT CORN GENOTYPES

NICÉSIO FILADELFO JANSSEN DE ALMEIDA PINTO; MARCOS JOSÉ DE OLIVEIRA FONSECA

MOLD CAUSED BY Aspergillus flavus AND Penicillium spp. DURING STORAGE OF HUMID GRAINS IN DIFFERENT CORN GENOTYPES

2006

NICÉSIO FILADELFO JANSSEN DE ALMEIDA PINTO | MARCOS JOSÉ DE OLIVEIRA FONSECA

The work had the objective of evaluating the behavior of several corn grain genotypes, in grains harvested while humid and stored in systems with continuous aeration and without aeration, in relation to the grain mold production for Aspergillus flavus and Penicillium spp. The following relationships between cultivars/moisture content were used: BR 206 (17.2%), BRS 2114 (18.3), BRS 2110 (18.5), BRS 1001 (19.1), BRS 2020 (19.2), BRS 3151 (19.5), BRS 3123 (19.5), BRS 1010 (21.2), BRS 3060 (21.3), BRS 3003 (21.4), CM 200.122 (21.9) and BRS 1030 (22.9). Immediately after the harvest and grain pre-cleaning, these were submitted to the storage in continuous aeration system - CAS - and in without aeration system - WAS. A completely randomized experimental design was used with 24 treatments in 3 replications. The moisture content and the percentage of grains visually moldy were determined 2, 6 and 9 days after the storage. The temperature in both systems were monitored daily, varying in CAS from 21.2 to 22.8 oC; and in WAS from 27.9 to 37.1 oC. The BRS 1010 and BRS 3060 cultivars harvested with the same moisture content, differed significantly amongst themselves in relation to the grains visually moldy at 2, 6 and 9 days WAS storage and 6 and 9 days in CAS storage. On the other hand, the BRS 3151 and BRS 3123 cultivars harvested with different humidity content did not differ amongst themselves, in both systems and storage periods in relation to the mold in their grains. In this manner, during the storage it was verified that in relation to the grain mold caused by A. flavus and Penicillium spp., in addition to moisture content of the grains, there are significant differences of behavior among the corn genotypes.

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