ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Hypoxic and hypercarbic cold storage for disinfesting grapefruit of Mexican fruit fly.

Shellie, K. C.; Cumaragunta, J.; Mangan, R. L.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 15 Pages: 98-104 Ref: 8 ref.

1997

บทคัดย่อ

Tolerance of 'Rio Red' grapefruit (Citrus paradisi) and third instar Mexican fruit fly larvae (Anastrepha ludens) to storage at 10 deg C in a hypoxic or hypercarbic atmosphere was evaluated in a series of four small experiments. Results from the first experiment demonstrated that storage in 40 or 60 kPa carbon dioxide (balance air) caused a breakdown of flavedo tissue, and that the fruit tolerated storage for up to 21 days in ultra low levels of oxygen (0.05, 0.10 or 0.15 kPa) of 20 kPa carbon dioxide (balance air). Results from the second experiment demonstrated that storage in 0.10 kPa oxygen was more lethal to late 3rd-instar larvae than storage in 20 kPa carbon dioxide (balance air). In a third experiment, mortality of late 3rd-instar larvae was shown to be higher after storage in 0.05 kPa oxygen than after storage in 0.10 kPa oxygen. Results from the fourth experiment demonstrated that grapefruit tolerated storage in ultra low levels of oxygen (0.05 of 0.10 kPa) for up to 21 days. Grapefrui

t stored in ultra low levels of oxygen had a lower incidence of decay, a higher amount of titratable acid, and a lower ration of soluble solids to titratable acid than grapefruit stored in air. The flavour of grapefruit stored in 0.05 kPa oxygen was rated 3 days after removal from cold storage as acceptable, yet significantly inferior to grapefruit stored in 0.10 kPa oxygen of grapefruit store in air. Results from these experiments suggest that storage in ultra low levels of oxygen has potential as a non chemical alternative for disinfesting grapefruit of A. ludens.