Efeito de óleos essenciais e composto citronelal sobre a micoflora de sementes de feijão armazenadas Effect of essential oils and citronellal compound on bean seeds stored microflora

This study aimed to evaluate the effect of essential oils of Cymbopogon Nardus, Eucalyptus citriodora and citronellal compound as alternative means conservation and sanitary quality of seeds of different genotypes. We used a completely randomized design, with 200 seeds subdivided into 50 repetitions for each treatment. The bean seeds Carioca, Caupi, Jalo and Preto, were treated with these essential oils in doses of 5, 10, 20, 30% and control (treated only with distilled water and autoclaved) were subsequently stored for 15, 30, 45 and 60 days. At the end of each storage period, the bioassays were performed using the Blotter test method for evaluation and identification of fungi colonies associated with the seed. the data were subjected to analysis of variance and the means compared by Tukey test at 5% probability. The oils used were efficient because they promoted the decrease in the number of colonies at all doses for the seeds of the four genotypes during storage, especially for larger doses. Analyzing the seeds witnesses, and the Aspergillus sp., Fusarium sp. and Penicillium sp. which had the largest number of colonies, respectively. Among the oils used, citronellal compound and C. nardus oil had no effect on inhibition of fungi in the seeds in all genotypes and in all doses.