Abstract The cis, cis-and trans, trans-isomere of the primary alcohols octadien-(3, 5)-ol-(1)(I), 15-acetoxy-nonadecadien-(10, 12)-ol-(1)(IV), 17-acetoxy-heneicosadien-(10, 12)-ol-(1)(V), 12-acetoxypentadecadien-(8, 10)-ol-(1)(VI) have been synthesized and tested for effectiveness as attractant together with several intermediates and analogues using the Silk Moth (Bombyx mori L.) and the Gipsy Moth (Lymantria dispar L.) The values of the ...