将烧红的工具伸进琼脂培养基中使之降温同时使接种工具具有一定的粘性。
The red-hot tool is then inserted into the agar to cool it and make it slightly sticky .
接种时因工具或种源（原种）带螨直接引入。
By the contamination of tools and stocks with mites during inoculation .
接种工具