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Altozar (ZR 512, ethyl 3,7,11-trimethyl-2,4-dodecadienoate) and Altosid (ZR 515, ethyl isopropyl 11-methoxy-3,7,11-trimethyl-2,4-dodecadienoate) were kindly given by Zoecon Corp.
The isomer mixture of Hoffmann-La Roche, kindly given by Prof. Dr. J. de Wilde, Entomological Department, Wageningen, was used.
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de Oliveira Campos, L.A., Velthuis-Kluppell, F.M. & Velthuis, H.H.W. Juvenile hormone and caste determination in a stingless bee. Naturwissenschaften 62, 98–99 (1975). https://doi.org/10.1007/BF00592188
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DOI: https://doi.org/10.1007/BF00592188