RESEARCH Journal of Chemical Ecology (2025) 51:11 https://doi.org/10.1007/s10886-025-01551-z Brazil faces a constant threat from a complex of stink bugs (Hemiptera: Pentatomidae), such as Oebalus poecilus (Dal- las), Paratibraca (= Glyphepomis) spinosa (Campos and Grazia 1998) (Grazia et al. 2022), and Tibraca limbativen- tris Stål, which are significant pests across all rice-growing Introduction Rice is a major carbohydrate source and plays a crucial role in ensuring food security for many low-income countries, including Brazil (Muthayya et al. 2014). Rice production in  M. C. Blassioli-Moraes carolina.blassioli@embrapa.br 1 Embrapa Recursos Genéticos e Biotecnologia, Laboratório de Semioquímicos, Brasília, DF 70297-400, Brazil 2 Invasive Insect Biocontrol and Behavior Laboratory, USDA- ARS, NEA, Beltsville, MD 20705, USA 3 Instituto Federal de Brasília - Instituto de Química, Gama, DF 72405-125, Brazil 4 Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - EPAGRI - Estação Experimental de Itajaí, Rod. Antônio Heil, 6.800 Itaipava, Itajaí, SC 88318-112, Brazil 5 Embrapa Arroz e Feijão, BR 364, km 5,5, C. Postal 406, Porto Velho RO 78900-970, Brazil 6 AGNR - Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA 7 Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil 8 Present Address: Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo (ESALQ/USP), Piracicaba, SP 13418-900, Brazil Abstract The small black stem bug, Paratibraca (= Glyphepomis) spinosa (Campos and Grazia 1998), is a rice pest in Brazil and is part of a complex of stink bugs that includes Oebalus poecilus (Dallas) and Tibraca limbativentris Stål. Together, these pentatomid species pose a serious threat to rice crops throughout South America. In this study, we identified the sex phero- mone of P. spinosa. Our findings revealed that male P. spinosa produces four male-specific compounds identical to those produced by T. limbativentris males. These include (3S,6S,7R)-1,10-bisaboladien-3-ol and (3R,6S,7R)-1,10-bisaboladien- 3-ol (zingiberenols), both sharing the same absolute configuration as the 1,10-bisaboladien-3-ol from T. limbativentris; along with two minor male-specific components: the cis and trans isomers of 2,10-bisaboladien-1-ol (sesquipiperitol). Y-tube olfactometer bioassays demonstrated that P. spinosa females were attracted to the odours of live males, whereas males showed no attraction to either sex. Females were particularly drawn to male volatiles, especially the fraction con- taining the compounds 1,10-bisaboladien-3-ol and 2,10-bisaboladien-1-ol. When tested with synthetic compounds, females were attracted to a blend of the two isomers, (3S,6S,7R)-1,10-bisaboladien-3-ol and (3R,6S,7R)-1,10-bisaboladien-3-ol, in the same ratio as naturally produced by males. Given that the sex pheromone compounds identified in P. spinosa are identical to those of T. limbativentris, we conducted bioassays with live heterospecific insects. In olfactometer bioassays, the females of both species were attracted by the odours of heteroespecific males. Keywords Rice pest · Stink bug behaviour · Attractants Received: 6 November 2024 / Revised: 5 December 2024 / Accepted: 14 December 2024 © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025 Shared Pheromone Compounds in Neotropical Rice Stink Bugs: The Role of Zingiberenol and Sesquipiperitol M. C. Blassioli-Moraes 1  · A. Khrimian 2  · M. F. F. Michereff 1  · D. M. Magalhães 1,8  · J. V. M. Costa 1,3  · E. R. Hickel 4  · J. A. Barrigossi 5  · R. A. Laumann 1  · S. D. Guggilapu 6  · J. Grazia 7  · M. Borges 1 1 3