New sex attractants for five Chamaesphecia species (Lepidoptera, Sesiidae)from the Ukraine and Turkmenistan

Field screening tests of (3Z,13Z)- and (3E,13Z)-octadecadienols, (2Z,13Z)- and (2E,13Z) octadecadienols and their acetates as well as some binary mixt ures of these compounds in dosages of 0.5 mg/dispenser were carried out in the Crimea, the Ukraine, and in the West Kopetdag mountains, Turkmenistan, in 1989-1993. New sex attractants for five clearwing moth species of the ge nus Chamaesphecia (Lepidoptera, Sesiidae) were discovered. Males of Ch. cha lciformis were attracted by a 1:1 mixture of 3Z,13Z-18:OH and 2E,13Z-18:OAc , Ch. schmidtiformis by a 9:1 mixture of 3Z,13Z-18:OAc and 3Z,13Z-18:OH in the Ukraine as well as in the ratios 9:1 and 1:1 in Turkmenistan, Ch. mezen tzevi by a 9:1 mixture of 3Z,13Z-18:OAc and the corresponding alcohol, Ch. zimmermanni by a 1:9 mixture of 3Z,13Z-18:OAc and 3E,13Z-18:OH, and Ch. spe cia nova in Turkmenistan by a 1:1 mixture of 3Z,13Z-18:OH and 3E,13Z-18:OAc . Two inhibitors, 3Z,13Z-18:OH and 3E,13Z-18:OAc, of the sex attractant wer e found for Ch. zimmermanni. The periods of attraction to the traps were re gistered for males of Ch. zimmermanni and Ch. specia nova and were found to occur at 19(00)-21(00) and 14(30)-17(00) local time, respectively. Males o f Ch. chalciformis and Ch. schmidtiformis were attracted to the traps in th e afternoon.