evaporative cooling

Avoid Evaporative Cooling in Citrus Freeze Protection

Daniel Cooper freeze, Weather

Both University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) speakers at a Nov. 28 winter weather workshop warned about the risk of evaporative cooling when using irrigation to protect citrus from freezing temperatures. Microsprinkler irrigation has been the main form of cold protection for Florida citrus for at least the last five decades.     The need to understand evaporative …

growers

Freeze Protection Measures for Citrus

Ernie Neff freeze

Multi-county citrus Extension agent Chris Oswalt discussed historical and current freeze protection measures in a virtual Dec. 22 OJ Break. PASSIVE MEASURESSome cold-protection measures are taken well in advance of freezes; Oswalt referred to them as passive measures. They include grove site selection, crop selection and cultural practices. One site selection consideration is planting groves at higher elevations, which are …

Cold Acclimation and Freeze Protection for Florida Citrus

Tacy Callies Freeze Protection

By Chris Oswalt and Davie Kadyampakeni In preparation for winter in Florida, citrus growers must first understand some essential concepts related to protecting citrus from freezing temperatures. Specifically, growers need to know when and how to protect citrus trees from freeze damage. WHEN TO PROTECT When (i.e., at what critical temperature) will damage begin to occur? This temperature is dependent on …

Evaluation of Tree T-PEEs for Freeze Protection in Young Citrus

Tacy Callies Freeze Protection, Water

By Kelly T. Morgan and Stephen J. Futch Water has been used for cold protection in past freezes with mixed success. Low dew point temperatures and high winds can promote evaporative cooling when insufficient amounts of water are used. Various methods have been used to protect young citrus trees from frost and freeze conditions. Among these, the use of covers …

Freeze Probability and Protection Efforts

Ernie Neff Freeze Protection

Florida hasn’t had a widespread tree-killing citrus freeze in years. That’s very fortunate since the industry has been dealing with the highly destructive HLB disease since 2005 and with negative impacts of Hurricane Irma since September. However, a damaging freeze is always a possibility at this time of year. Consequently, multi-county citrus Extension agent Chris Oswalt held a winter weather …

Cold Protection Resources for Citrus Growers

Josh McGill freeze, Weather

Citrus growers in Florida’s Panhandle will have a greatly reduced citrus harvest this year because of a hard freeze in December 2022, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) reported. To help growers reduce damage in future freezes, UF/IFAS has tools that aid with citrus cold protection. Water is the most common form of cold protection …

Drought and Freeze Don’t Deter Grower

Josh McGill Organic, Production, Weather

Apopka citrus grower Chip Henry reports that McGuire Groves received 9.5 inches of rain in March 2022. In March 2023, it received less than half an inch. Portions of Lee, Hendy and Collier counties were in an extreme drought as of April 6, according to the U.S. Drought Monitor. Many other areas of Florida, including where McGuire Groves is located, …

Don’t Rush Freeze Recovery

Josh McGill freeze

Do not apply recovery techniques immediately after a freeze, cold-hardy citrus growers were advised after freezes hit their groves in December 2022 and January 2023. The best strategy is to wait to observe new growth until at least late spring, researcher Muhammad Shahid told the Georgia Citrus Association at its recent annual meeting. Shahid is a University of Florida Institute …

Cold Acclimation Helping Trees Rebound From Freeze

Josh McGill Cold Hardy, freeze

Trees in the Sweet Valley Citrus region are more acclimated to cold temperatures than those in Central and South Florida. That is a reason that Bill Barber, Certified Crop Adviser and owner of Barber Ag Services, believes citrus trees in North Florida, South Georgia and South Alabama have rebounded well following the Christmas freeze event. “I first thought the worst. …

Farm Service Agency Offers Freeze Assistance

Josh McGill financial, freeze, Georgia

The U.S. Department of Agriculture’s (USDA) Farm Service Agency (FSA) in Georgia is reminding farmers and landowners of the assistance it offers in the wake of a freeze. The state’s citrus industry suffered damage during the five-night freeze that occurred in late December. The FSA programs are the Tree Assistance Program (TAP) and the Noninsured Crop Disaster Assistance Program (NAP). …

Taking Care of Trees After the Five-Night Freeze

Josh McGill Cold Hardy, freeze

“To some extent, every citrus variety has suffered from cold damage” due to the five-night freeze event that occurred in the cold-hardy citrus region Dec. 24–28. That report comes from Jake Price, Lowndes County Extension coordinator for University of Georgia Extension. “The site of our citrus research plots in Valdosta reached a low of 16 degrees, which is the lowest …

Legislation Introduced for Growers Impacted by Freezes

Tacy Callies freeze, Legislative

U.S. Representatives Greg Steube (R-Fla.) and Darren Soto (D-Fla.) introduced the Temperature Endorsement for Multi-Peril Policies (TEMP) Act to protect farmers impacted by crop-damaging freezes. Rep. Steube proposes this legislation for inclusion in the 2023 farm bill. “This winter, a freeze caused significant damages to Florida’s citrus, sugarcane, ornamental plants, and many fruits and vegetables. Currently, specialty-crop insurance policies are expensive, leaving farmers with limited options …

Georgia and Florida Citrus Avoid Major Freeze Damage

Josh McGill Florida, Georgia, Weather

The Georgia and Florida citrus industries reportedly came through the Sunday morning freeze with no significant widespread damage. In Florida, temperatures in the 20s were the coldest most groves had experienced in several years. “Everything looks good,” said Lindy Savelle, president of the Georgia Citrus Association. “We got some burn on the top of trees, but very little.” Most of …

weather

Cold Protection: The Tried and the New

Ernie Neff cold protection

Tried and proven cold protection techniques and changes to the Florida Automated Weather Network (FAWN) were discussed in a virtual Nov. 17 winter weather program. Chris Oswalt, citrus Extension agent for Hillsborough and Polk counties, summarized the decades-old cold protection techniques still practiced by Florida citrus growers. One of the first steps in cold protection is being prepared by staying …

Citrus Growers Dodge Freeze

Ernie Neff freeze

Lindy Savelle received numerous calls and texts from relatively new southern Georgia citrus growers prior to a mild freeze the morning of Dec. 2. “They were asking, ‘What should I do?’” said Savelle, president of the Georgia Citrus Association. The new growers were concerned because lows of 26 and 28 that morning were the coldest in the region in several …

citrus

Get Florida Freeze Updates With Winter Weather Watch

Tacy Callies Tip of the Week, Weather

By Chris Oswalt There was a time back in 1962, on Dec. 12 and 13, when a devastating freeze in Florida decimated a significant portion of the state’s citrus industry. In Polk County, the freeze caused serious damage to 134,000 acres of citrus. In 1963, citrus growers were concerned about receiving timely weather information and frost warning bulletins. Back then, …

citrus

Citrus Growers Can Call for Frost Protection Information

Daniel Cooper cold protection, Industry News Release

(UF/IFAS) — Just one freeze could cripple much of Florida’s citrus crop. It happened 30 years ago. Chris Oswalt, a multi-county commercial citrus agent for University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Extension, remembers the frost-bitten evenings. Christmas 1983, January 1985 and Christmas 1989 marked three of the worst citrus freezes in the state’s history. Even though …

weather

Helping Generations Cope with Freezes

Ernie Neff freeze, Weather

Winter Weather Watch is a University of Florida Institute of Food and Agricultural Sciences Extension program that has helped generations of Florida citrus growers be prepared for freezes. “Back in the ’60s, we didn’t have the Internet. We had rotary dial phones,” says multi-county citrus Extension agent Chris Oswalt, who discusses the history and workings of Winter Weather Watch, which …

growers

UF/IFAS Experts: Growers Ready for Freezes

Daniel Cooper Freeze Protection

When the next frost threatens Florida’s crops, growers will do their best to make sure your favorite foods are protected from the potentially crippling chill, say University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) experts. For example, citrus growers use wind machines and microsprinklers to ensure freezing temperatures don’t ruin the fruit, said Chris Oswalt, a multi-county citrus …

Cold-Protection Practices for Citrus

Ernie Neff cold protection

Chris Oswalt, University of Florida Institute of Food and Agricultural Sciences citrus Extension agent for Polk and Hillsborough counties, discusses passive and active cold-protection practices for citrus trees. “Passive practices are those things that growers would intentionally do before typically planting the grove,” Oswalt says. Site selection, including planting on higher elevations that are warmer than lower cold-pocket locations, is …