1、Farmers are concerned about the damage caused by rootworms to their corn crops.
农民们对玉米根虫对他们的玉米作物造成的破坏非常担忧。

2、The use of genetically modified crops has been effective in controlling rootworm infestations.
使用转基因作物对控制玉米根虫的侵袭非常有效。