KEY POINTS
  • A winter storm that struck the Southeast is the latest blow to an already struggling Florida citrus industry.
  • Late last year, Hurricane Irma caused losses of 50 to 70 percent of Florida's citrus crop in portions of South Florida.
  • Florida was already in a decade-long battle with "greening."
  • "This is pretty much the knockout year for Florida citrus," state official Shannon Shepp says.

A powerful winter storm that struck the Southeast this week is the latest blow to an already struggling Florida citrus industry, a state official told CNBC on Thursday.

Heavy snow and high wind pounded the Southeast on Wednesday, dumping snow on Florida's capital for the first time in three decades and damaging crops. The governors of Florida, Georgia, North Carolina and Virginia declared states of emergency, warning residents to expect icy roads and freezing temperatures.