01348nas a2200109 4500008004100000245010500041210006900146520093800215100002201153700002201175856004101197 2019 eng d00aNew Data on Vibrational Communication in the Beetle Acanthoscelides obtectus (Coleoptera, Bruchidae)0 aNew Data on Vibrational Communication in the Beetle Acanthosceli3 a

Many Bruchidae species are quarantine pests and are widely used as model species. However, as far as we know, acoustic communication has never been studied in detail in this group. Below we present the first data on the repertoire and emission mechanisms of acoustic communication in the bean weevil Acanthoscelides obtectus. Three types of signal emission were recorded in A. obtectus: striking the head and abdomen against the substrate, abdominal tremulations, and wing vibrations. Two types of signals were recorded in males, and one type, in females. All the acoustic signals recorded in A. obtectus contained both stable (pulse duration, pulse period: CV = 5–12%) and variable (duration of the pulse series: CV = 50%) signal elements. The frequency parameters showed low variation in all the signals (CV = 5–11%). Moreover, the dominant frequencies were similar in all the signal types (889–1158 Hz).

1 aShestakov, L., S.1 aKasparson, A., A. uhttps://bio.acousti.ca/nl/node/5739602162nas a2200193 4500008004100000245010800041210006900149520151300218653001101731653002101742653001601763653002401779653001001803100002701813700002401840700001901864700002501883856006001908 2019 eng d00aEffects of Hypoxia on Acoustic Activity of Two Stored-Product Pests, Adult Emergence, and Grain Quality0 aEffects of Hypoxia on Acoustic Activity of Two StoredProduct Pes3 a

Modified atmospheres such as hermetic storage are widely used for the control of stored grain insect pests. To improve their effectiveness, there is need to better understand insect responses to low-oxygen environments. Adult Callosobruchus maculatus F. (Coleoptera: Chrysomelidae: Bruchinae) on cowpea and Sitophilus oryzae L. (Coleoptera: Curculionidae) on wheat were exposed to hypoxia treatments consisting of 1, 3, and 5% oxygen levels for 14 d. Acoustic activity was monitored during the experiment, and insect mortality and grain quality were examined immediately after the hypoxia treatments. Adult emergence was assessed 45 d post-treatment. All three hypoxia treatments eliminated acoustic activity of both species within 4 d. There was neither insect survival for both species nor significant grain damage immediately after 14-d exposure to hypoxia treatments. No adult insects emerged 45 d post-exposure on grains maintained at 1% oxygen level for 14 d. However, at 3 and 5% oxygen levels, there were eggs on cowpea, holes in wheat, and emerging adults for both insect species 45 d post-exposure. Although insect activity ceased within 4 d when hypoxia was maintained below 5%, there is need to explore exposure beyond 14 d for 3 and 5% oxygen levels, to ensure to avoid potential adult emergence from eggs and other insect life stages post-treatments. Maintaining 3–5% hypoxia conditions for a longer duration would ensure insufficient oxygen is available for progeny development.

10acowpea10ahermetic storage10ainsect pest10amodified atmosphere10awheat1 aNjoroge, Anastasia, W.1 aMankin, Richard, W.1 aSmith, Bradley1 aBaributsa, Dieudonne uhttps://academic.oup.com/jee/article/112/4/1989/548892701465nas a2200241 4500008004100000245012900041210006900170300001400239490000700253520073000260653002100990653001501011653001901026653001501045653001401060653001101074653001701085653001301102100002701115700001501142700002501157856004101182 1993 eng d00aFiles and scrapers: circumstantial evidence for stridulation in three species of Amblycerus, one new (Coleoptera: Bruchidae)0 aFiles and scrapers circumstantial evidence for stridulation in t a122–1320 v693 a

Amblycerus stridulator NEW SPECIES, A. pollens (Sharp) and A. eustrophoides (Schaeffer) have in common a fusifrom node with transverse striations on the metepisternum and an apical tooth on the metafemur. The fusiform node (file) and the apical tooth (scraper) may be stridulatory organs. Similar structures in criocerine Chrysomelidae are discussed and compared to the bruchods. Ambycerus eustrophoides and A. pollens are redescribed. Ambylcerus stridulator NEW SPECIES is described from Mexico. The species differ in the sclerites in the internal sac. patterns of pubescence, and the position of the fusiform node on the metepisternum.

10aA. eustrophoides10aA. pollens10aA. stridulator10aAmblycerus10aBruchidae10aMexico10astridulation10ataxonomy1 aKingsolver, John, Mark1 aRomero, JN1 aJohnson, Clarence, D uhttps://bio.acousti.ca/nl/node/5278200439nas a2200109 4500008004100000245012800041210006900169300001200238490000800250100003000258856004100288 1999 eng d00aDescription of two new species of Amblycerus Thunberg (Coleoptera: Bruchidae) with a probable stridulatory mechanism0 aDescription of two new species of iAmblycerusi Thunberg Coleopte a337-3460 v1011 aRibeiro-Costa, Cibele, S. uhttps://bio.acousti.ca/nl/node/5274602246nas a2200265 4500008004100000022001400041245014600055210006900201260001600270300001400286490000800300520138500308653002301693653002801716653001601744653002501760653001801785653002301803100002401826700002501850700001701875700001901892700001801911856005101929 2017 eng d a0015-404000aBioacoustics of Acanthoscelides obtectus (Coleoptera: Chrysomelidae: Bruchinae) on Phaseolus vulgaris (Fabaceae)0 aBioacoustics of iAcanthoscelides obtectusi Coleoptera Chrysomeli cJan-03-2017 a109 - 1150 v1003 aAcanthoscelides obtectus (Say) (Coleoptera: Chrysomelidae) is an economically important pest of common bean, Phaseolus vulgaris L. (Fabaceae), in the tropics and subtropics. The larvae are cryptic and spend most of their development time inside the bean seeds. Their presence is almost imperceptible except for circular emergence holes created by the last instar larvae in preparation for their exit as adults. We considered a hypothesis that readily available acoustic detection devices can be used to detect larvae and adults in stored beans. Laboratory experiments were conducted in an anechoic chamber to characterize the sounds of movement and feeding and estimate whether they could be distinguished from background noise in storage environments. The larvae produced low-amplitude insect sound impulses frequently occurring in trains (bursts) of 2 or more impulses (mean = 3.6). The adults produced lower-amplitude impulses, although at a higher rate than the larvae, and there were significantly fewer impulses per burst. These features of the acoustic signals were useful for real-time detection of A. obtectus infestation and discrimination from background noise in stored common beans in sub-Saharan Africa. The use of such technology in the future, especially if its costs can be reduced further, may contribute to efforts to alleviate hunger and poverty in the region.10aacoustic detection10aalmacenamiento de grano10acommon bean10adetección acústica10agrain storage10asub-Saharan Africa1 aAffognon, Hippolyte1 aMutungi, Christopher1 aRichter, Uwe1 aHensel, Oliver1 aRohde, Barukh uhttp://www.bioone.org/doi/10.1653/024.100.0116