Effect of film coating substance on coating characterization and quality of corn seed

Abstract

This objective of this study was to determine the effect of film former on coating substance characteristicsand quality of coated corn seed. There were 3 experiments which were to study the effect of type and proportion ofpolymer as a film former on pH, viscosity, dissolution of film, coating uniformity and corn seed germination, todetermine the stability of coating substances by freeze thaw method and to determine the stability of coatingsubstances at stability after seed germination storage. The results showed that pH and viscosity of coating substancescontaining hydroxypropyl methylcellulose, the mixture of hydroxypropyl methylcellulose and polyacrylate andthe mixture of hydroxypropyl methylcellulose and vinyl acetate as a film former were about 5-7 and 300 cps,respectively. These coating substances had coating uniformity and did not affect seed germination. Freeze thawmethod testing showed coating stability of these substances. In addition, pH and viscosity of coating substances thatstorage 6 months had decreased because the film formers were denatured but no affect on coating uniformity and theseed quality. It could be concluded that film former affect on quality of corn coated seed.