Many fruits, vegetables, and ornamentals of tropical or subtropical origin are sensitive to low
temperatures (Paull 1990). These crops are injured after a period of exposure to chilling
temperatures below 10 to 15 °C (50 to 59 °F) but above their freezing points (Lyons 1973, Wang
1990). Certain horticultural crops of temperate origin are also susceptible to chilling injury
(Bramlage and Meir 1990). Those temperate crops, in general, have lower threshold
temperatures of