The emergence of B. tabaci on cotton fields was in the last ten days of May in Dunhuang city. And then it generally appeared in the last ten days of June, but its population density was at a lower level.
4.敦煌市5月下旬烟粉虱开始迁入棉田,6月下旬开始普遍发生,但虫口密度较低,此后一个月烟粉虱种群数量维持在一个较底水平。
参考来源 - 敦煌市棉田烟粉虱的发生规律及防治研究·2,447,543篇论文数据,部分数据来源于NoteExpress
以上来源于: WordNet
They drove through the cotton fields that flanked Highway 17.
他们驾车穿过了17号公路边上的棉田。
In them old cotton fields back home.
就是我家后面的那片老棉花田。
They were working in the cotton fields.
他们在棉田里干活。
At a meeting of the National Negro Business League, Madam Walker explained that she was a woman who came from the cotton fields of the South.
VOA: special.2010.03.28
And when he goes picking in the cotton fields, he imagines that he could be a slave.
当他去采棉花的时候,他把自己想象成一个奴隶。
Determined to leave the cotton fields of rural Tennessee for the bright lights of Chicago, Koko packed her bags and moved there with her future husband Robert Taylor.
VOA: standard.2009.06.18
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