Abstract
The coating of rice seeds with Imidacloprid together with an oxygen supplier is effective in controlling the plant hopper and green leafhopper. The effect of the method of mixed coating on seedling emergence in the submerged direct seeded rice was examined in pot experiments. In the excess-dried and usual-dried seeds the rate of seedling emergence when seeded 3 days after the coating was influenced neither by the presence of chemicals nor by method of mixing. However the non-dried seeds coated with Imidacloprid together with an oxygen supplier showed a lower seedling emergence percentage than those coated with the oxygen supplier alone. The seeds coated by the "easy method" showed the lowest seedling emergence percentage. When seeded 10 days after coating, was not inhibited by coating with Imidacloprid plus oxygen supplier in the seedling emergence excess-dried seeds, but was inhibited in usual-dried and non-dried seeds. The chemicals coated on the seeds by the "whole method" fell off more easily than those coated by the "easy method" after sowing. Especially, the chemicals coated on excess-dried seeds fell off easily.
