Mortality of Caribbean Fruit Fly (Diptera: Tephritidae) Larvae Infesting Mangoes Subjected to Hot-Water Treatment, then Immersion Cooling

Publisher Website
Google Scholar
Abstract
Cooling mangoes after their immersion in 46.1-46.7°C water was evaluated for its effect on mortality of Caribbean fruit fly, Anastrepha suspense (Loew), larvae. More time to achieve Probit 9 (99.9968%) mortality was estimated for larvae in mangoes that were allowed to cool slowly in relatively still air at 23 ± 0.5°C, compared with larvae in mangoes that were cooled rapidly in circulating water at 21 or 27 ± 0.5°C. However, the differences were not statistically significant. One larva of A. suspense survived out of an estimated 17,589 larvae infesting mangoes that were immersed in 46.1-46.7°C water for 54 min and then immediately placed in 21 ±0.5°C water. No survivors were found when infested mangoes containing an estimated 17,589 larvae were immersed in 46.1-46.7°C water for 54 min and cooled in 23 ± 9.5 air. These results suggest that the effects of rapidly cooling commodities after they are subjected to heat quarantine treatments should be considered when the treatments are developed, especially if rapid cooling of the commodities might be practiced.