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Field experiments were conducted to determine the attraction of adult Costelytra zealandica (White) to phenol, the sex pheromone for this species, and the phenolic aldehyde, 4-hydroxybenzaldehyde, when presented separately and in a mixture in traps. Aqueous phenol and 4-hydroxybenzaldehyde in acetone were equally attractive to beetles when presented separately in traps; a mixture of aqueous phenol and 4-hydroxybenzaldehyde in acetone also attracted similar numbers of beetles to either chemical alone. When the two chemicals were presented in separate tubes in the same trap, ca 2-fold greater numbers of beetles were attracted than with either component alone. Supplementary experiments showed solvent type and age of solution had no influence on the attractiveness of 4-hydroxybenzaldehyde when presented alone in traps. A possible explanation for the role of 4-hydroxybenzaldehyde, a component of some host plants of C. zealandica, acting in concert with the sex pheromone of this species is briefly discussed.

proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference

Attraction of adult <i>Costelytra zealandica</i> to 4hydroxybenzaldehyde