and the eastern Gansu weeds belt in the loess plateau mainly consisting of Bromus, Chorispora and Green Bristlegrass.

• 陇东黄土高原旱作草害区主要杂草有雀麦、离子草、狗尾草等。 明确了各地主要杂草种类与危害,为制定化学防除策略提供了依据。