ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Gamma irradiation for insect deinfestation damages native Australian cut flowers.

Seaton, K. A.; Joyce, D. C.;

Scientia Horticulturae Year: 1992 Vol: 52 Issue: 4 Pages: 343-355 Ref: 28 ref.

1992

บทคัดย่อ

Gamma irradiation doses >0.05 kGy for Geraldton wax (Chamelaucium uncinatum) cultivar Purple Pride, >0.1 kGy for banksia (Banksia hookeriana) and >1.0 kGy for red and green kangaroo paw (Anigozanthos manglesii) caused significant reductions in flower and foliage vase lives. Doses >2 kGy and less than or equal to 10 kGy were required for immediate 100% mortality of the bioassay insects (Tribolium confusum, Ceratitis capitata and Spodoptera litura). Pretreating Geraldton wax shoots (cv. Newmarracarra) by cooling them (2.5 deg C) or pulsing them with sugar (5% sucrose) lessened the detrimental effects of irradiation (0.1 kGy) on vase life. Pretreatment with silver thiosulphate (4 mM Ag+) had no positive effect. Irradiation of Geraldton wax shoots (cv. Purple Pride) in an inert atmosphere (N2) exacerbated the irradiation-induced reduction in vase life and increased flower abscission. Exposing Geraldton wax cv. Alba shoots to 10 kJ microwave energy reduced their vase life by 81%. Exposing them to 68 kJ microwave energy killed them. None of the postharvest treatments tested were sufficiently ameliorative for irradiation to be considered a viable disinfestation treatment for Geraldton wax.