ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Mortality of black field crickets (Teleogryllus commodus) in carbon dioxide atmospheres.

Stevenson, D. G.; Hurst, P. L.;

New Zealand Journal of Zoology Year: 1995 Vol: 22 Issue: 4 Pages: 381-385 Ref: 17 ref.

1995

บทคัดย่อ

The efficacy of controlled atmospheres incorporating 5, 9, 18, 30, and 57% carbon dioxide with 20% oxygen, balance nitrogen, or 57% carbon dioxide with 12% oxygen, balance nitrogen, were tested for the postharvest disinfestation of horticultural crops using Teleogryllus commodus as a model insect. Crickets were also exposed to air as a control. Exposure times ranged from 2 to 48 h at 20 deg C. Crickets were then left for 24 h in air, and mortality was assessed. Exposure time and controlled atmosphere significantly affected insect mortality. There was very low mortality (<3.5%) in air, in 5% and in 9% carbon dioxide with 20% oxygen. Mortality generally increased with increasing exposure time with more than or equal to 18% carbon dioxide. The estimated exposure time required to achieve 99% mortality (LT99) was 62.8 h for 18% carbon dioxide, 20% oxygen, and 31.7 h for 57% carbon dioxide, 20% oxygen. The longer LT99 for 57% carbon dioxide, 12% oxygen, of 42.4 h indicates that a combination of high c

arbon dioxide (57%) and 20% oxygen could be an effective controlled atmosphere for postharvest insect disinfestation.