The paper deals with the study of the influence of the ageing and treatments with fungicide on the corn seeds cold test from different calibers.The purpose of this study started from the fact that during the ageing of the seeds important changes are produced, starting with the accumulation of turnoff substances of the raising, the metabolic putrefaction of the substituted substances, the denaturation of the proteins and lipids, likewise the fact that the seeds carry on their surface, under the coating or even inside them a lot of pathogens or pestiferous that continue the evolutive cycle and this fact could influence the values of the vigour potential, appreciated through cold test.To improve the health of the seed using seed treatment with different physical means, chemical or biological. The research was conducted under controlled conditions of growth (fitotron), and the seeds were treated with the product Topsin least 70 concentration 2gr/10l water.The cold test exposes the corn seeds, derived from three hybrids(T-201, T-200,    T-165) from four calibers(LL, LR, ML, MR) at 10o C  for 7 days in fertile soil at an absorbing capacity of the water of 60-70%, after that, before they were exposed to some rasing period for 6 days at a temperature of 25o C. Germ was made after assessing the 13th day from the germinated.The work is prezentete experimental results obtained in the years 2007-2008, and biological material hand machines was created to resort Turda Research and Development in 2004, 2005, 2006.Following research it was found that the most favorable size for obtaining vigorous germ is large widescreen size (LL) and fungicide treatments Topsin 70 PU not significantly change their values from any of the hybrids tested.The determination result will permit the classification of the seeds lots in resistance groups, giving the possibility to choose the best period of sowing.

corn; age; treatment; cold-test

Presentation: oral