The use of glueline insecticides in plywood and laminated veneer lumber is commonplace in several countries. However, few glueline fungicides are registered for commercial use with previous work suggesting that achieving control of decay from the glueline is very challenging. This paper summarises two tests completed on Pinus radiata plywood with a new glueline fungicide comprising the active ingredients triadimefon and cyproconazole (Triad/Cypro). Tests were completed in New Zealand using a bin method to satisfy the requirements for the H1.2 hazard class (wet area framing). In both tests, Triad/Cypro in the glueline of plywood restricted decay growth comparably or better than the recognised reference preservative of propiconazole plus tebuconazole applied as a light organic solvent preservative treatment.

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