Njoroge, A W and Affognon, H D and Mutungi, C and Rohde, B and Richter, U and Hensel, O and Mankin, R W (2016) Frequency and time pattern differences in acoustic signals produced by Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) and Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae) in stored maize. Journal of Stored Products Research, 69. pp. 31-40. ISSN 0022474X
![[img]](http://oar.icrisat.org/style/images/fileicons/application_pdf.png) |
PDF
- Published Version
Restricted to ICRISAT users only Download (2MB) | Request a copy |
Abstract
Frequency spectra and timing patterns of brief, 1–10 ms broadband sound impulses produced by movement and feeding activities of Prostephanus truncatus and Sitophilus zeamais last instars and adults in maize were investigated to find spectral and temporal pattern information useful for distinguishing among these species and stages. The impulse spectra were categorized into five different types of frequency patterns (profiles), designated Broadband, HighF, MidF1, MidF2 and LowF to indicate differences in their peak energies and broadness of frequency range. Groups (trains) of three or more closely spaced impulses, termed bursts, were observed to occur frequently in all recordings, as has been reported for sounds produced by other insects. Mean rates of bursts, mean counts of impulses per burst, and mean rates of impulses in bursts were calculated and compared among the two species and stages. The counts of broadband and MidF2 impulses per burst and the rates of broadband and MidF2 impulses in bursts were significantly different for adult than for 4th instar S. zeamais and either stage of P. truncatus. These findings can be useful in developing an acoustic sensor system for automated detection of hidden insects including P. truncatus and S. zeamais in bulk storage warehouses. The findings are discussed in relation to different movement and feeding behavior patterns that have been identified in these important pests.
| Item Type: | Article |
|---|---|
| Divisions: | Research Program : West & Central Africa |
| CRP: | CGIAR Research Program on Dryland Cereals |
| Uncontrolled Keywords: | Detection; Sensor; Pest management; Postharvest; Maize |
| Subjects: | Others > Maize |
| Depositing User: | Mr Ramesh K |
| Date Deposited: | 14 Dec 2016 05:04 |
| Last Modified: | 06 Sep 2017 08:54 |
| URI: | http://oar.icrisat.org/id/eprint/9811 |
| Official URL: | http://dx.doi.org/10.1016/j.jspr.2016.06.005 |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | Authors are thankful to the German Ministry for Economic Cooperation and development (BMZ) under the Reduction of Postharvest Losses and Value Addition in East African Food value chains (RELOAD) project and the International Centre for Insect Physiology and Ecology (icipe) for facilitating the study. |
| Links: |
Actions (login required)
 |
View Item |
Altmetric
Altmetric