Abstract:

As a simple,practical and available measurement for pest monitoring and forecasting pest occurrence,sound monitoring is attracting increasing attention. By means of transforming the acoustic signals into electrical signals,purifying and extracting the sound of insects through an electronic filter,and amplifying the signals,the species and quantity of the insects were able to determined according to the sound frequency,the signal pulse and the characteristic values. Insects sound in two ways: one from the sounding apparatus itself;the other out of friction with the medium in its actions such as feeding,exercising and communication. Currently,the sound monitoring research is mainly on the audible sound emitted by the sounding apparatus of different insect groups,including the study of agricultural pests and non-agricultural pests (such as forest pests,soil pests).There are few studies about the sound of insect frictions,because it is susceptible to interference of the sensor noise,environmental noise and signal noise,and it can easily be simulated,there for,the useful signals are often masked,which brings about difficulties to distinguish the specific sound information of insects. In this paper,on the basis of introducing the history and progress of studies on monitoring technology of insect sound,at home and abroad,we briefly analyze the advantages and problems of sound monitoring technology for different insect groups and propose the relevant strategy of solution and the focus of the study in the future.

Key words: pest, sound monitoring, noise, frequency