Host (habitat) location and host discrimination | Boln. Asoc. esp. Ent. 21 (Supl.): 104 | 1997
Kairomonal activity of Nezara viridula secretions analogues in host recognition by Trissolcus basalis
M.C. Rosi, H. Williams, S.B. Vinson, F. Bin & S. Colazza
ABSTRACT
Trissolcus basalis can be induced to probé artificial hosts (eggs) of Nezara viridula by the adhesive produced by tbe follicular cells of the fernale bug. Additional evaluation of the adhesive revealed that the active component could be separated from the adhesive by thin layer chromatography. Further separations by gas chromatography revealed severa! active regions of the chromatogram, but no peaks were revealed.
Since femaie 7! basaiis respond to trans-2-decenal at several order of magnitude below the sensitivity of GC, we evaluated the response of females to serial of doses of a number of chemical structures related to trans-2-decenal. The evaluation of several dozen compounds revealed that both chain length and double bond were important for activity, but the functional groups (ester. alcohol, aldehyde or acid) were not.
In behavioral bioassays, T. basalis females exposed to egg masses of 3 Pentatomidae species (.
The importance of this informan´on for host location and recognition will be discussed.
