为了解决林木蛀干害虫早期监测困难的问题,利用自主研建的声音侦听系统采集并分析了云杉大墨天牛幼虫、双条杉天牛幼虫、柏肤小蠹成虫、褐梗天牛幼虫、光肩星天牛幼虫和星天牛幼虫和黄斑星天牛幼虫等7种林木蛀干害虫的声音。结果表明:7...为了解决林木蛀干害虫早期监测困难的问题,利用自主研建的声音侦听系统采集并分析了云杉大墨天牛幼虫、双条杉天牛幼虫、柏肤小蠹成虫、褐梗天牛幼虫、光肩星天牛幼虫和星天牛幼虫和黄斑星天牛幼虫等7种林木蛀干害虫的声音。结果表明:7种害虫蛀食声均由离散的声脉冲组成,单个声脉冲时域图的波形前大后小,并快速出现一个最大振幅,波形变化不规则。频域图则呈锯齿状,均有一个主峰频率。声脉冲持续时间低于50.0 ms,主频低于8.0 k Hz,脉冲间隔时间无明显规律。时频数值经聚类分析后,同属害虫间相似性高,相同寄主的害虫也表现出一定相关性。该研究证明了所构建声音侦听系统的实用性,扩充了林木蛀干害虫的声音数据库,发现了害虫声音特征的一些基本规律。展开更多
A devastating trunk beetle has been found in Baisha loquat in Dongshan Town, Wuzhong District, Suzhou City in recent years. It is iden-tified as a new insect species, Cryphalus eriobotryae, belonging to Scolytinae, Cu...A devastating trunk beetle has been found in Baisha loquat in Dongshan Town, Wuzhong District, Suzhou City in recent years. It is iden-tified as a new insect species, Cryphalus eriobotryae, belonging to Scolytinae, Curculionidae, Coleoptera. So far, loquat is known as the unique host of C. eriobotryae, and trees of 20-30 years old or 3-4 years old are all attacked by the insect. Holes drilled by adults with the diameter of about0.8 mm and sores(ate by adults) with the diameter of 1 mm are found on bark and trunk of damaged trees. Three-dimensional channels in 3-4 layers are formed in cortex, which are filled with insect dung. The phloem turns black-brown in late stage, and loses transport function, resulting in plant death and a great impact on loquat production and industrial development. During the occurrence period of C. eriobotryae from April to November,the damaged trunks and branches should be sprayed with 48% chlorpyrifos EC or 5% imidacloprid EC 100 times dilution once every 10 d for con-tinuous 2-3 times, and various states of the insect could be killed. If the phloem is damaged in the early and middle stages and does not turn black and brown completely, the plant could grow new cortex to realize recovery.展开更多
文摘为了解决林木蛀干害虫早期监测困难的问题,利用自主研建的声音侦听系统采集并分析了云杉大墨天牛幼虫、双条杉天牛幼虫、柏肤小蠹成虫、褐梗天牛幼虫、光肩星天牛幼虫和星天牛幼虫和黄斑星天牛幼虫等7种林木蛀干害虫的声音。结果表明:7种害虫蛀食声均由离散的声脉冲组成,单个声脉冲时域图的波形前大后小,并快速出现一个最大振幅,波形变化不规则。频域图则呈锯齿状,均有一个主峰频率。声脉冲持续时间低于50.0 ms,主频低于8.0 k Hz,脉冲间隔时间无明显规律。时频数值经聚类分析后,同属害虫间相似性高,相同寄主的害虫也表现出一定相关性。该研究证明了所构建声音侦听系统的实用性,扩充了林木蛀干害虫的声音数据库,发现了害虫声音特征的一些基本规律。
文摘A devastating trunk beetle has been found in Baisha loquat in Dongshan Town, Wuzhong District, Suzhou City in recent years. It is iden-tified as a new insect species, Cryphalus eriobotryae, belonging to Scolytinae, Curculionidae, Coleoptera. So far, loquat is known as the unique host of C. eriobotryae, and trees of 20-30 years old or 3-4 years old are all attacked by the insect. Holes drilled by adults with the diameter of about0.8 mm and sores(ate by adults) with the diameter of 1 mm are found on bark and trunk of damaged trees. Three-dimensional channels in 3-4 layers are formed in cortex, which are filled with insect dung. The phloem turns black-brown in late stage, and loses transport function, resulting in plant death and a great impact on loquat production and industrial development. During the occurrence period of C. eriobotryae from April to November,the damaged trunks and branches should be sprayed with 48% chlorpyrifos EC or 5% imidacloprid EC 100 times dilution once every 10 d for con-tinuous 2-3 times, and various states of the insect could be killed. If the phloem is damaged in the early and middle stages and does not turn black and brown completely, the plant could grow new cortex to realize recovery.
