2种天牛幼虫的4类声行为特征  

Acoustic behaviors for two species of cerambycid larvae

作　　者：卜宇飞 祁骁杰 温俊宝[1] 许志春[1] 

机构地区：[1]北京林业大学林木有害生物防治北京市重点实验室,北京100083

出　　处：《浙江农林大学学报》2017年第1期50-55,共6页Journal of Zhejiang A&F University

基　　金：北京市科技创新基地培育与发展工程专项项目(Z131105002813017)

摘　　要：应用声音侦听技术监测隐蔽性害虫是一种较有前景的方法,明确害虫各类声行为的特征有利于排除不同声行为混合叠加的干扰,从而有效地识别害虫种类及其活动方式。利用红外监控下的声音侦听系统对光肩星天牛Anoplophora glabripennis幼虫和星天牛A.chinensis幼虫的声行为进行了分类和分析。2种天牛幼虫的声行为主要分为取食、爬行、清理蛀道和自卫4类,取食声占比最高,可达34%。4类声行为在时域图的最大振幅、波形和脉冲持续时间以及频谱图的能量分布和频段均表现出了不同的特征。此外,对声行为进行时域和频域的定量分析发现,脉冲持续时间和脉冲主频均体现出较大差异,取食声脉冲持续时间短,分别为25.96 ms和24.28 ms,主频最高,超过7.00 k Hz。对天牛幼虫不同声行为的信号特征进行了探索,尝试通过排除各类声行为的干扰以提高侦听效果,同时发现取食声脉冲时间短、振幅大且频率高,在实际侦听时可以进行较快的辨别。Acoustic detection technology is a promising method to monitor hidden pests. Defining characteristics about different acoustic behaviors of pests is beneficial to improve the accuracy of acoustic detection technolo-gy, can eliminate interference between different acoustic behaviors to help identify species and pest activities. This study explored and analyzed acoustic behaviors for different cerambycid larvae of A n oplophora glabripen- nis and Anoplophora chinensis by using an infrared monitoring and acoustic detection system. Results showed four types of acoustic behaviors： feeding, moving, cleaning, and self-protection, with feeding sounds having the largest proportion （34%）. Time-domain graphs revealed differences with maximum amplitude, waveform, and pulse duration. Energy distribution and frequency band in spectrograms also showed differences. Single sound pulse duration and dominant frequency of acoustic behaviors had different characteristic values. Pulse duration of the feeding sound was short （25.96 ms for A . glabripennis and 24.28 ms for A . chinensis） . The highest dominant frequency was with the feeding sound （exceeding 7.00 kHz）. This study produced helpful information regarding elimination of noise and showed that in practical application the feeding sound could be easily iden-tified with short pulse duration, large amplitude, and high frequency. [Ch, 3 fig. 2 tab. 17 ref.]

关 键 词：森林保护学 声音侦听技术 隐蔽性害虫 光肩星天牛 星天牛 声行为 声音特征 

分 类 号：S763.3[农业科学—森林保护学]