他们将那些棉籽经过挑选之后才播种。
Residues of thidiazuron and its isomers were determined in cotton seeds and soil.噻苯隆及其异构体在棉籽和土壤中残留量测定方法。
The final residues of the insecticide remained in cotton seeds were discovered to be not detectable.最终残留量的测定结果说明,氟氯菊酯在棉籽中无残留。