单词boll weevil
un.: 〔动〕棉铃象甲；棉铃象虫；棉蛉小象甲
网络: 棉铃象甲虫
墨西哥棉铃象（棉花害虫）:
an insect that damages cotton plants
棉蛉小象甲
棉铃象虫
〔动〕棉铃象甲
But in the early years of the century, the boll weevil began devastating the cotton farms in the south.
然而在上世纪初期，棉铃象甲开始侵嗜美国南部的棉花农场。
In the long run, they saw that the boll weevil had, in fact, done them a favor by destroying their crops.
从长远来看，他们发现棉铃象甲虫虽破坏了农作物，但实际上反倒帮了他们的忙。
Gossypol, which is produced by gland cells in the leaves of cotton, is an attractant to the boll weevil.
棉叶腺胞分泌的棉酚对棉铃象鼻虫是一种引诱剂。
How big do you think a boll weevil is?
你知道棉子象鼻虫有多大吗？
work in the South helped to fight the cotton boll weevil.
南部农场示范工作大大帮助了对棉花象鼻虫的防治。