The reasons why weeds are difficult to remove in wheat fields are as follows:
1. The weather in the past winter was abnormal. From early November to late-2010, the temperature was low and the rain was continuous. The effect of autumnal weeds was poor and could not be carried out. Missed the best time for weed control.
2. Due to successive years of medication, the amount of drugs has been continuously increased, resulting in the continuous increase of weed resistance.
3, lack of water spray, spray uneven, can not penetrate.
4. There are many types of weeds in wheat fields, and herbicides can only control some weeds and cannot be completely eliminated.
1. The weather in the past winter was abnormal. From early November to late-2010, the temperature was low and the rain was continuous. The effect of autumnal weeds was poor and could not be carried out. Missed the best time for weed control.
2. Due to successive years of medication, the amount of drugs has been continuously increased, resulting in the continuous increase of weed resistance.
3, lack of water spray, spray uneven, can not penetrate.
4. There are many types of weeds in wheat fields, and herbicides can only control some weeds and cannot be completely eliminated.
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