03505naa a2200301 a 450000100080000000500110000800800410001902200140006002400250007410000140009924502230011326000090033650009870034552015780133265300220291065300240293265300190295665300110297565300140298665300150300070000310301570000140304670000150306070000220307570000180309770000160311577300720313110623232021-07-23 2021 bl uuuu u00u1 u #d a1526-498X7 a10.1002/ps.65282DOI1 aSESSA, L. aEpicuticular hydrocarbons of the redbanded stink bug Piezodorus guildinii (HeteropterabPentatomidae): sexual dimorphism and alterations in insects collected in insecticide-treated soybean crops.h[electronic resource] c2021 aArticle history: Received 8 June 2021, Accepted article published, 24 June 2021. This work was financed by Agencia Nacional de Investigación e Innovación (ANII) grant POS_NAC_2016_1_130245 and Instituto Nacional de Investigación Agropecuaria (INIA Uruguay) Projects SA24 and SA47, and by Agencia Nacional de Promoción Científica y Tecnológica, grant PICT 2015 2763, Argentina. Assistance of Mabel Pessio from INIA Estanzuela is acknowledged. Corresponde: Girotti, J.R.; Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Universidad Nacional de La Plata (UNLP), La Plata, Argentina; email:jgirotti@med.unlp.edu.ar - Pedrini, N.; Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CCT La Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Universidad Nacional de La Plata (UNLP), La Plata, Argentina; email:npedrini@med.unlp.edu.ar aABSTRACT - BACKGROUND: The redbanded stink bug Piezodorus guildinii (Heteroptera: Pentatomidae) is one of the most important species affecting soybean crops in southern South America. Capillary gas chromatography coupled to mass spectrometry was used to characterize the epicuticular hydrocarbon profiles of field-collected insects, and to identify differences in their composition between fifth-instar nymphs and adults, males and females, and between bugs collected in insecticide-treated and insecticide-free soybean crops. RESULTS: Straight chain saturated n-C27 and n-C29, and monomethyl and dimethyl chains of C31 and C33 were the most abundant compounds. A group of volatile hydrocarbons with n-C13 and n-C15 as the predominant compounds were also detected. The hydrocarbon pattern was different between nymphs and adults, either males or females. Heneicosene was almost exclusively detected in adult males and was the most important component to differentiate between both sexes, followed by tricosadiene. The total hydrocarbon amount was significantly higher in nymphs, males and females collected in insecticide-treated fields compared with insects obtained from untreated fields. CONCLUSION: Differences were found in the epicuticular hydrocarbon pattern among nymphs and adults, as well as sexual dimorphism in adult stink bugs. Interestingly, an alteration was also found in the hydrocarbon profile of insects collected in insecticide-treated soybean crops and its relevance is discussed within a pest management context. © 2021 Society of Chemical Industry. aHalyomorpha Halys aHydrocarbon pattern aInsect cuticle aLipids aPesticide aResistance1 aCALDERÓN-FERNÁNDEZ, G.M.1 aABREO, E.1 aALTIER, N.1 aMIJAILOVSKY, S.J.1 aGIROTTI, J.R.1 aPEDRINI, N. tPest Management Science, 2021. Doi: https://doi.org/10.1002/ps.6528