Abstract
Vase life of red ginger flowers, Alpinia purpurata (Vieill.) K. Schume, subjected to postharvest hot-air conditioning (40°C, 64% r.h.) for 2 h prior to hot-water immersion (49°C for 12 min) equaled or exceeded the vase life of red ginger treated in hot-water immersion only and control flowers in 96% of the trials conducted during a one year period. Reduced flower quality (marketability) (13% of trials) and reduced vase life (4% of trials) from hot-air and hot water treatments occurred in months with high rainfall (≥58 cm month −1 ) or drought (≤5 cm month −1 ). Flowers conditioned in hot air before hot-water immersion tolerated 49°C water for up to 13 min, exceeding a proposed 12 min treatment time with no significant loss in vase life or marketability. No apparent benefits were observed for conditioning flowers longer than 2 h in hot air. Hot-air conditioning prior to hot-water immersion increased mealybug survival by 0.4–40%.
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