在聚集度指标的测定中，杨干象幼虫符合聚集分布。
Indexes of aggregation indicate that the larvae fit aggregated distribution.
本文论述了讷河市杨干象甲发生现状，并提出了治理对策。
The paper discusses condition of Yang stem weevil in NeHe and puts forward control measure.
方差分析表明：63杨、69杨微纤丝角、基本密度、抗弯强度和干缩率差异显著，说明63杨和69杨受滩地类型影响较大。
It indicates that there are significant differences for microfibril Angle, basic density, bending strength and rate of shrinkage of poplar 63 and poplar 69 by variance analysis.
华西枫杨、连香树树叶干重损失达77%、71%； 而米心水青冈和多脉青冈树叶干重损失为43%和42 %。
The loss rate of dry weight of Pterocarya insignis and Cercidiphyllum japonicum was 77% and 71%, and shat of Fagus engleriana and Cyclobalanopsis multinervis was 43% and 42%.
华西枫杨、连香树树叶干重损失达77%、71%； 而米心水青冈和多脉青冈树叶干重损失为43%和42 %。
The loss rate of dry weight of Pterocarya insignis and Cercidiphyllum japonicum was 77% and 71%, and shat of Fagus engleriana and Cyclobalanopsis multinervis was 43% and 42%.
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