DEGRADATION AND STABILIZATION OF E8,E10-DODECADIENOL, THE MAJOR COMPONENT OF THE SEX-PHEROMONE OF THE CODLING MOTH (LEPIDOPTERA, TORTRICIDAE)

Exposure of E8,E10-dodecadienol, the major component of codling moth p heromone, to sunlight and air resulted in extensive degradation, prima rily to nonvolatile oligomers and polymers. Contents and surface resid ues of new and field-aged pheromone dispensers used in coding moth mat ing disruption were also analyzed. The tacky film on the surface of fi eld-aged dispensers was primarily nonvolatile decomposition products, and the pheromone remaining in the reservoir of field-aged dispensers degraded significantly. Carbon black, which physically blocks light, a nd 2 phenylenediamine antioxidants were effective stabilizers that hin dered pheromone degradation.