JGTS 2018/12
Volume 15, No.3 : 163-182
Thx sxx ahxroTonx of LxguTx aoK iorxr, Tzrutz vitrztz (LxaiKoatxrz: trzTiiKzx) RxvisitxK

BAanu TRPa, BaPana Gowdab, PrinivaPan RaPaPaPyc, T.N. Divyaa, V.A. RaPZAandraa, A.T. ZAaTravartAyd, Pxi-ying Linc, ZAAun Ay Axnge, ParxtA Tange and Por PariTae
aBio-Zontrol RxPxarZA LaboratorixP, Bxngaluru, TarnataTa, India
bIZAR-National RiZx RxPxarZA InPtitutx, ZuttaZT, OdiPAa, India
cWorld Vxgxtablx Zxntxr, PAanAua, Tainan, Taiwan
dIZAR-Indian InPtitutx of AortiZultural RxPxarZA, Bxngaluru, TarnataTa, India
eDxpartPxnt of Plant ProtxZtion Panitary and PAytoPanitary, Gxnxral DirxZtoratx of AgriZulturx, PAnoP PxnA, ZaPbodia.

Abstract: Female produced sex pheromone of Maruca vitrata containing three components had been reported from countries in tropical Asia and sub-Saharan Africa. (E,E)-10,12-hexadecadienal as a major component, (E,E)-10,12-hexadecadienol and E-10-hexadecenal as minor components blended in the ratio of 100:5:5 was found to attract M. vitrata male moths in few countries in West Africa. However, this blend was found to have less or no effectiveness in trapping M. vitrata population in Asia, which triggered the need to refine the M. vitrata pheromone formulation. The isomers of major and minor pheromone compounds of M. vitrata were evaluated in this study. When subjected to Electroantennogram (EAG) analysis against male antennae, the isomer (Z,E)-10,12-hexadecadienal as a major component blended with the minor components (E,E)-10,12-hexadecadienol and (E)-10-hexadecenol in 100:10:5 was found to elicit better antennal response than the standard three component blend. GC-EAD profiles of the individual synthetic isomer components supported the EAG results. Additional experiments also confirmed the attraction of M. vitrata pheromone compounds and their isomers along with host plant volatiles in EAG and wind-tunnel experiments. Field experiments in India and Cambodia confirmed the effectiveness of improved M. vitrata pheromone lures in attracting the adult male moths in legume fields.

Keywords:  Maruca vitrata; EAG profile; isomers of female sex pheromone; EAG/GC-EAD profiling; field trials.

*Corresponding author; e-mail: srini.ramasamy@worldveg.org
© 2018  Nanhua University , ISSN 1727-2394