Colonization of Maize Grain by Fusarium moniliforme and Fusarium proliferatum in the Presence of Competing Fungi and Their Impact on Fumonisin Production

摘要: This study was carried out to determine the effect of water activity (aw) and temperature on patterns colonization maize grain by isolates Fusarium moniliforme F. proliferatum in presence interacting spoilage fungi, such as Aspergillus flavus, A. niger, ochraceus, Penicillium implicatum, over 4-week incubation periods. The impact that interactions have infection populations production fumonisins were all evaluated. At 0.93 0.95 aw, two spp. with other species a large extent resulted mutual inhibition contact or overgrowth spp., regardless growth rates species. Seed at 25 degrees C influenced mainly flavus reduction up 45 30%, respectively, after 2 weeks. 15 lowered aw levels, reduced, sometimes completely inhibited, P. implicatum. By contrast, (CFU per gram grain) reduced niger particularly 4 weeks incubation. Interaction 0.98 significant stimulation fumonisin both implicatum decrease moniliforme. However, interaction an enhanced temperatures aw. has shown fungal may act additional control factor development grain. although lead decreased Fusarium, lower accumulation does not occur same time. Knowledge these is essential for improving effective procedures preventing mycotoxin fungi.