论文部分内容阅读
东北农业大学农学院科研人员近期研究提出了黑龙江省水稻二化螟虫口密度与水稻产量损失的关系和经济阈值,为指导实际生产提供了理论依据。研究结果表明,在水稻分蘖期,二化螟虫口密度(X)与产
Northeast Agricultural University College of Agriculture researchers recently proposed the relationship between population density and rice yield loss of rice borers in Heilongjiang Province and economic threshold, to provide a theoretical basis for the actual production. The results show that at the tillering stage of rice, the population density of stem borer (X) and yield