2020-06-30-坑爹的帝王蝶毛毛虫是益虫

One question deals with the effects that Bt plants have on nontarget organisms such as beneficial insects, worms, and birds that consume the genetically engineered crop. For example, monarch caterpillars feeding on 

说明monarch caterpillars 是beneficial insects

这题不能脑补啊，一看毛毛虫就以为是害虫了，靠。