Abstract:

To better understand the quality of corn seed-coatings , physical and chemical properties and safety of six corn seed-coatings were tested. Film-forming, Coating homogeneity and suspension rate of all coatings met the National Standards. Viscosity values of 15.5% Thiram?Carbofuran and 8.1% Carbofuran?Tebuconazole?Triadimenfon reached the National Standards. pH ranges of all seed coatings occurred between 6.38 and 7.55, and 25% Carbofuran?Thiram?Carboxin, 15% Thiram?Carbofuran?Tebuconazole and 20% Thiram?Carbofuran?Triadimenal came up to the National Standards. Pull-out rate of seed coatings met the National Standards excerpt 25% Carbofuran?Thiram?Carboxin. Germination potential, germination rate, germination index, date of seedling vigor index, seedling length and fresh weight of seeds treated with seed coating were lower than the control in Laboratory. Seedling emergency rates of all treatments in field trail were improved comparing with the control, but seedling quality had no significant increase. The results showed that 15.5% Thiram?Carbofuran is the best choice among the six corn seed-coatings.