Incidence of Sclerotinia sclerotiorum and the physical and physiological quality of soybean seeds based on processing stages
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Data
2013
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Resumo
Soybean (Glycine max L. Merrill) is infected by a large number of fungal pathogens, among them white mold
agent [Sclerotinia sclerotiorum (Lib) de Bary]. The objective of this study was to verify the effect of the seed-processing stages
on the physical and physiological qualities and on the incidence of S. sclerotiorum in soybean seeds. In this study, seeds from
eight cultivars coming from production fields naturally infested in the counties of the State of Goiás, Brazil, from two harvests
(2009/2010 and 2010/2011), were used. Samples were collected in the processing stages: hopper, pre-cleaning, discard one
(from pre-cleaning), cleaning, sieve classifiers, spiral, gravity table, and discard two (after cleaning until processing ending).
The following parameters were evaluated: seed- moisture content, physical purity, germination and tetrazolium. Additional
tests and the detection of S. sclerotiorum in paper roll and the neon method were performed. The processing of soybean seeds
improves the physical and physiological quality of the seed lots, in addition to eliminating sclerotia. The stages of pre-cleaning
and cleaning significantly reduce sclerotia in seed lot. The amount of sclerotia in the sample is not necessarily correlated with
the incidence of S. sclerotiorum in mycelial form.
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Palavras-chave
White mold, Seed health tests, Physical purity, Germination, Neon method, Mofo-branco, Pureza física, Teste de sanidade, Germinação, Método neon
Citação
TELES, Heria de Freitas; Pires, Larissa Leandro; CUNHA, Marcos Gomes da; SANTOS, Flavio Pereira dos; AMELOTI NETO, Francisco. Incidence of sclerotinia sclerotiorum and the physical and physiological quality of soybean seeds based on processing stages. Research Journal of Seed Science, Londrina, v. 35, n. 4, p. 222-229, 2013.