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

不出所料，于抵御农业的杀剂是一个主要原因。

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已在北于消灭螺旋蝇(一种农业)并抑制几种吃稼的果蝇。

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

他说。 很难估计每年农业成的破坏有多大， 但据信有数十亿。

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.

国禁止进口它们，因为它们可能携带寄生，包括一种可能导致脑膜炎的寄生，认为是一种高度侵入性的农业。英国广播公司的新闻。