preharvest spraying

• 采前喷施

preharvest spraying的用法和样例：

例句

1. So,bagging and preharvest calcium spray had relatively satisfied effects on the external quality and commercial value of Washington navel orange.
   采前喷钙和套袋对提高华脐果实的外观品质和商品性具有很好的作用。