Atividade antifúngica Atividade antifúngica do óleo de alecrim sobre sementes de Phaseolus lunatus

Abstract

The objective of this work was to determine the effect of rosemary oil (Rosmarinus officinalis) on seed physiological and sanitary quality of lima bean seeds (Phaseolus lunatus), with cultivars 'Ray of Sun', 'Rosinha' and 'Roxinha'. The treatments were composed of the captana fungicide (240 g. 100 kg-1 of seeds), rosemary essential oil at 0.25; 0.5; 0.75 and 1.0 mL.L-1 diluted in distilled and sterilized water, plus 0.05 mL of Tween 20 and control (untreated seeds). The incubation method substrate filter paper “Blotter test was used for seed sanitary analysis. The physiological quality was determined based on the results of first germination counting, germination, germination speed index, length and dry matter of shoot and seedling root. A completely randomized experimental design was used in four replications. The genera identified were Fusarium sp., Cladosporium sp., Penicillium sp., Colletotrichum sp., Aspergillus sp., Nigrospora sp., Curvularia sp., Botrytis sp., Bipolaris sp. e Phytophthora sp. He rosemary oil is efficient in reducing the incidence of associated fungi and does not interfere with the lima bean germination and initial growth in 'Raio de Sol', 'Rosinha' and 'Roxinha' cultivars at the evaluated concentrations.