Farm demonstration work in the south helped to fight the cotton boll weevil .

在南部的农业示范作帮助了对棉花象鼻虫的抗争。

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Farm demonstration 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。

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In the early years of the century, the boll weevil began devastating the cotton farms in the south.

在上世纪初期，棉铃象甲开始破坏南部的棉花农场。

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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。

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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。

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But in the early years of the century, the 3 boll weevil began 4 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。

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But in the early years of the century, the 3 boll weevil began 4 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。

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