近几年 ,稻李氏禾在八五八农场部分地号发生较重 ,造成了不同程度的减产。据1998年田间调查 ,由于稻李氏禾发生面积大 ,13.5 hm2 稻池平均产量 390 0 kg/ hm2 ,严重发生的稻池产量不足 2 2 5 0 kg/ hm2。一般除草剂较难防治 ,人工拔除费时费力 ,很难根治。 1999年八五八农场在 In recent years, rice Lee Wo Wo in part of the number eighty-eight farmland occurred heavier, resulting in different levels of yield reduction. According to the field survey conducted in 1998, due to the large area of ​​rice Lai, the average yield of 13.5 hm2 rice ponds was 390 0 kg / hm2, and the serious rice pond production was less than 2250 kg / hm2. General herbicides more difficult to prevent, manual removal time-consuming and laborious, it is difficult to cure. In 1999 eight five eight farm in