Or, in each square decimeter of seedling-bed and in each stroke, 1.75 or 9.32 individuals of E. subrufa might be swept-in. 5.

• 7．白翅浮尘子在春季秧田之平均每平方公寸密度，于同一环境下，在本地稻秧床为1.；75头，蓬莱稻9