02229naa a2200349 a 450000100080000000500110000800800410001910000190006024500950007926000090017430000190018349000080020252013060021065000110151665000120152765000100153965000130154965000290156265000120159165300190160365300110162265300120163365300180164565300110166365300190167465300090169365300140170265300140171665300140173070000230174477301120176714530312012-04-23       1985    bl uuuu     u00u1 u    #d1 aHENNING, A. A.  aControl of Sclerotinia sclerotiorum (Lib.) de Bary and Alternaria spp. in sunflower seeds.  c1985  ap.375-378. t.2  vt.2  aThe efficiency of seed treatment with different fungicides and mixtures was evaluated for the control of Sclerotinia sclerotiorum and Alternaria spp. in sunflower seeds. Achenes of the hybrid Contissol infected with S. sclerotiorum were treated with the following fungicides: benomyl (Benlate 50 WP) 3.5g a.i./kg; carboxin (Vitavax 75 WP) 5.25g a.i./kg; thiabendazol (Tecto 10) 1.4g a.i./kg; thiabendazol 1.4g a.i./kg + carboxin 5.25g a.i./kg; thiabendazol 0.7g a.i./kg + carboxin 2.625g a.i./kg. The treatments were evaluated by the blotter test, PDA and emergence in greenhouse. High levels of S. sclerotiorum and Alternaria spp. were observed in the untreated seeds in PDA and blotter. Carboxin 5.25g a.i. drastically reduced Alternaria spp. but had no effect on S. erotiorum. Thiabendazol 1.4g and benomyl 3.5g efficiently controlled S. sclerotiorum, but did not affect Alternaria spp. The mixture thiabendazol 1.4g + carboxin 5.25g was very effective in controlling the pathogens, and resulted in the best seed emergence index in greenhouse. Half dosage treatments were not efficient in controlling the pathogens. Based on the results, seed treatment with the misture thiabendazol 1.4g + carboxin 5.25g is the most efficient way of reducing seed transmission and dissemination of those pathogens.  aBrazil  aDoença  aFungo  aGirassol  aSclerotinia Sclerotiorum  aSemente  aAlternaria spp  aBrasil  aDisease  aFitopatologia  aFungus  aPhytopathology  aSedd  aSunflower  aTreatment  aTrtamento1 aFRANCA NETO, J. B.  tIn: CONFERENCIA INTERNACIONAL DE GIRASOL, 11., 1985, Mar del Plata, Actas. Mar del Plata: ASAGIR/ISA, 1985.