Unsurprisingly, pesticides, which are used to ward off agricultural pests, are a major reason.

不所，用于抵御农业害虫杀虫剂是一个主要原。

SIT has been used in North America to eliminate screwworm flies, an agricultural pest, and to suppress several species of crop-munching fruit flies.

SIT已在北美被用于消灭螺旋蝇(一种农业害虫)并抑制几种吃庄稼果蝇。

It’s difficult to estimate how much damage agricultural pests do every year, but it’s believed to be in the billions.

他说。 很难估计农业害虫每年造成损失有多大， 但据信损失金额达数十亿美元。

The US bans their importation as they can carry parasites including one that can leads to meningitis and are considered a highly invasive agricultural pest. BBC News.

美国禁止进口，为可能携带寄生虫，包括一种可能导致脑膜炎寄生虫，被认为是一种高度侵入性农业害虫。英国广播公司新闻。