Millions of boxes of fruit and thousands of acres of citrus trees have been lost in freezes and frosts. Oranges are usually damaged when the fruit are exposed to temperatures of 28°F or lower for four hours or more. As the temperature gets colder ordurations below 28°F get longer, damage to fruit, leaves, twigs, and eventually large branches increases. Low volume undertree microsprinkler irrigation has proven effective during several freeze nights in Central Florida tests. In addition to frost protection, microsprinklers can provide effective year-round irrigation.
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