Why will spraying fruit trees with water help to protect the fruit from breezing?”?
The air temperature can not drop below freezing while there is unfrozen water present. Many plants contain fluids that will not freeze until their temperature is below 32F (the freezing point of the water spray). While freezing, water gives up its latent heat of fusion that limits cooling below freezing. Many plant cells are not damaged unless liquid within the cells crystallizes (produce is maintained fresh within a refrigerator but must be used at once after thawed from a freezer).
