Viability equation to determine the longevity of fungicide-treated seeds of wheat stored in a conventional warehouse = Equa o de viabilidade para determinar a longevidade de sementes de trigo tratadas com fungicida em armaz谷m convencional

作者：Maria Celeste Marcondes; Claudinei Andreoli; edison Miglioranza

来源：Acta Scientiarum - Agronomy, 2011.

• Triticum aestivum L.
• deterioration
• storage
• seed treatment
• mathematic model
• deteriora o
• armazenamento
• tratamento de semente
• modelo matematico

The objective of this research was to determine the deterioration rate of BRS 208 and CD 104 wheat cultivar seeds, treated with fungicides, by applying the viability equation. Seeds were stored in conventional warehouses in Mau芍 da Serra and Londrina, in the State of Paran芍, Brazil. Four seed lots were divided into four replications, half being treated with Carboxin + Thiran and the other half taken as controls, without treatment, and these were stored for 300 days. The germination data were transformed into probit, anda straight line was adjusted between 0 and 30 days. The treated seed lot of cv. BRS 208 stored in Londrina gave seed deterioration rates varying from 0.8.10-3 to 1.3.10-3, not differing from the values given for the similar lot stored in Mau芍 da Serra, of 0.9.10-3.Thedeterioration rates of the treated seed of cv. CD 104 were 1.2.10-3 in Mau芍 da Serra and 2.0.10-3 in Londrina, which are greater than those values given for untreated seeds of 0.4.10-3 and 0.5.10-3.This model provides an effective approach to predict the untreated and treated seed longevity of wheat for the purpose of managing seeds. O objetivo deste trabalho foi aplicar a equa o de viabilidade para determinar a taxa de deteriora o e a longevidade das sementes de trigo, tratada com fungicida, das cultivares BRS 208 e CD 104, emarmazenamento convencional, em Mau芍 da Serra e Londrina, PR. Quatro lotes de sementes foram divididos em quatro partes, sendo a metade tratada com fungicida Carboxim + Thiram, armazenados por 300 dias. Os dados de germina o foram transformados em probit e a declividade da reta foi calculada entre zero e 30 dias. Os lotes tratados, da cv BRS208, armazenados em Londrina tiveram o coeficiente variando de 0,8.10-3 a 1,3.10-3, n o diferenciando de Mau芍 da Serra, 0,9.10-3. A taxa de deteriora o para a semente tratada da cv. CD 104 foi 1,2.10-3 em Mau芍 da Serra e 2,0.10-3 em Londrina, foi superior a 0,4.10-3 e 0,5.10-3 para sementes n o-tratadas. O modelo prediz com acur芍cia a longevidade das sementes de trigo tratadas e n o-tratadas.