近几年,佳木斯地区在稻田杂草调查中发现一种新的多年生禾本科杂草,经东北农学院田德昌教授鉴定为稻李氏禾Leersia oryzoides(L)SW。一、发生情况 80年代初,在佳木斯地区只在水渠旁发现有稻李氏禾,后其逐渐侵入稻田,危害日趋严重。据桦南、饶河县和佳木斯市郊区调查,已有11个乡镇1400多公顷稻田感染稻李 In recent years, a new perennial weed was found in the rice weed survey in Jiamusi region. It was identified as Leersia oryzoides (L) SW by Professor Tian Dechang of Northeast Agricultural College. First, the situation In the early 1980s, Jiamusi region found only in the waterway next to the rice Lee Wo, after its gradual invasion of paddy fields, the increasingly serious harm. According to the investigation in suburbs of Huanan, Raohe and Jiamusi, more than 1,400 hectares of paddy fields have been infected with rice and plums in 11 townships