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Influence of fungal pathogens and environmental conditions on disease severity, flower fall and desiccation of harvested Geraldton waxflower 1. Studies with model packages.

Taylor, M. N.; Joyce, D. C.; Wearing, A. H.; Simons, D. H.;

Australian Journal of Experimental Agriculture Year: 1997 Vol: 37 Issue: 7 Pages: 817-824 Ref: 36 ref.

1997

บทคัดย่อ

Influence of fungal pathogens and environmental conditions on disease severity, flower fall and desiccation of harvested Geraldton waxflower 1. Studies with model packages.

Flowering sprigs of Geraldton waxflower (Chamelaucium uncinatum cv. Alba) inoculated with Botrytis cinerea, Alternaria alternata or left uninoculated (control treatment) were kept in sealed plastic containers (model packages). Three relative humidity treatments (75, 90 or 100%) by 4 temperature treatments (5, 10, 20 or 5/20 deg C (alternated daily)) were maintained. An additional treatment of ethylene absorbent (Purafil) sachets in the model packages was included. Disease severity, flower fall and desiccation were monitored over 22 days. Both disease severity and flower fall were reduced in treatments with no inoculum, at lower temperatures (5, 10 and 5/20 deg ) and under reduced relative humidities (75 and 90%). However, desiccation was a problem at 75 and 90% relative humidity and at 20 and 5/20 deg . Ethylene scrubbing at 100% relative humidity did not significantly reduce disease severity or flower fall. Considered collectively, the results showed that postharvest disease severity, flower fa

ll and desiccation can be minimised by keeping waxflower at less than or equal to 10 deg and more than or equal to 90% relative humidity.