哈尔滨地区缀叶丛螟生物学特性观察

为防治哈尔滨胡桃楸Juglans mandshurica林中发生的缀叶丛螟Locastra muscosalis,通过室内饲养观察和调查统计缀叶丛螟在3块样地中的危害情况,明确缀叶丛螟在哈尔滨地区的发生规律及生物学特性。结果表明:哈尔滨地区的缀叶丛螟老熟幼虫冬眠期长达220~240 d,越冬茧入土浅,多分布在距地表3 cm内(P <0.05)的土层中。缀叶丛螟在哈尔滨地区表现出相应的适应寒冷的特征,化蛹和羽化时间都比文献记载的向后推迟。

林学虚拟仿真实验课程体系构建探索

基于计算机和网络技术的飞速发展,虚拟仿真实验项目逐渐成为高校实验室建设和实践教学改革的重要内容。以东北林业大学林学专业为例,主要介绍了林学虚拟仿真实验教学项目的构建和应用情况。林学专业积极构建模块化的虚拟仿真实验课程体系,将知识传授和操作技能培养有机结合起来,为进一步提升人才培养质量做出了有益探索。

Ultrastructure of stridulating organ of Xylotrechus rusticus L. (Coleoptera, Cerambycidae) and behavioral responses to alarm sounds

We used scanning electron microscope （SEM） to observe the ultrastructure of stridulating organs in Xylotrechus rusticus L. We com- pared the morphological structure and size of stridulating organs, the numbers of a tooth-like part used in stridulation and its presence in fe- males and males of this beetle. The alarm sound of X.. rusticus was re- corded first when it was stimulated, then we tested behavioral responses to this alarm sound. The alarm sound ofX. rusticus has a warning effect on conspecifics.

The Countermeasures of Ecological Rehabilitation in Jinghe National Wetland Park

By analyzing the ecological status of Jinghe National Wetland Park of Qinggang,Heilongjiang,the countermeasures of ecological rehabilitation in Jinghe National Wetland Park are put forward.