Monitor and Manage Ambrosia Beetles

Josh McGill Pests

Winter Storm Elliott brought freezing temperatures to the Florida Panhandle Dec. 24–28, 2022, resulting in significant damage to citrus in the cold-hardy growing region. Trees that received significant freeze damage are more vulnerable to pests and diseases. Ambrosia beetles are among the pests being seen as a result of the storm. Because ambrosia beetles generally prefer dead or dying trees, …

Rootstock Influences Cold-Hardiness in Sugar Belles 

Josh McGill freeze, Mandarins, Rootstocks

Sugar Belles on four different rootstocks in Georgia showed different levels of damage from the December 2022 freeze, reported Jake Price, Lowndes County Extension coordinator for University of Georgia Extension. The Sugar Belles at a Valdosta research plot planted in 2018 have put on the first flush of foliage after being mostly defoliated. The trees are snuggly located between windbreaks …

Can Brassinosteroids Help Citrus Cope With Disease and Extreme Weather?

Josh McGill Diseases, Research, Weather

By Fernando Alferez and Muhammad A. Shahid Brassinosteroids (BRs) are a natural group of hormones that regulate physiological and biochemical attributes that include seed germination, flower development, root formation and resistance to various abiotic and biotic stresses. BRs have shown promise in reducing pests and diseases in a wide range of plants, including citrus. A commercial formulation of BRs has …

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 …

Freeze Had Greatest Impact on Young Trees

Josh McGill Cold Hardy, freeze

Lindy Savelle, president of the Georgia Citrus Association, and other industry leaders continue to preach to growers the need to diversify their crop portfolios. The Christmas freeze event that ravaged production in the Southeast last December should not be a deterrent for farmers hoping to produce citrus other than satsuma mandarins. Yes, non-satsuma citrus trees were impacted more by the …

Pheromones Essential in Leafminer Management

Josh McGill Cold Hardy, Pests

Citrus growers should emphasize leafminer management this year to preserve new flushes. This is especially important for those producers affected by the Christmas freeze event. The management strategy should include pheromone disruptions, which can help reduce pest populations. Xavier Martini, assistant professor of entomology at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) North Florida Research and …

Ambrosia Beetles a Concern Post-Freeze

Josh McGill freeze, Georgia, Pests

Researcher Apurba Barman recently reported that ambrosia beetles could be a potential concern following the December 2022 freeze event in the cold-hardy citrus region. Barman is an assistant professor of entomology with the University of Georgia College of Agricultural & Environmental Sciences.  Ambrosia beetles are small insects that bore holes into stressed trees. While they have been seen attacking young …

Leafminer Management Vital for Freeze-Impacted Trees

Josh McGill freeze, Pests

Cold-hardy citrus growers need to protect their trees against the citrus leafminer this year, more so than ever. A lack of control could have negative consequences for trees still recovering from the Christmas freeze last December. Xavier Martini, assistant professor of entomology at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) North Florida Research and Education Center, …

rootstock

Satsumas Look ‘Pretty Darn Good’ Post-freeze

Josh McGill Cold Hardy, freeze

Satsumas in the Sweet Valley Citrus region appear to have aced their first test of multiple days of subfreezing temperatures. It is still a wait-and-see approach with other varieties, however. One grower was extremely optimistic about satsumas, the cold-hardy mandarins that look to have survived December temperatures in the teens. “Satsumas are pretty darn good. We lost some leaves, got …

First Step Taken to Establish a Georgia Citrus Commission

Josh McGill Cold Hardy, Legislative

The Georgia House of Representatives Agriculture & Consumer Affairs Committee passed legislation that would establish a Georgia Citrus Commission. It must now go to the House Rules Committee before being discussed in the Senate. A citrus commission would be a huge step for an industry that has already exploded in Georgia, said Lindy Savelle, president of the Georgia Citrus Association …

New President Has Plans for Cold Hardy Citrus Association

Josh McGill Cold Hardy

Mark Clikas, who became president of the Cold Hardy Citrus Association (CHCA) in February, has a recovery focus and sales goal for the group. “My focus is to get the members of CHCA more involved in the organization to help the growers improve the citrus trees’ health after the major freeze event around Christmas 2022,” he said. “My goal is …

Sweet Valley Citrus Expansion Could Stall

Josh McGill Cold Hardy, freeze

Trees in the Sweet Valley Citrus region have been in high demand in recent years. Plantings of satsuma mandarins and other citrus varieties have steadily risen the past few years in Georgia, Alabama and North Florida. That steady climb is expected to stall this year, however. Following the Christmas freeze event that rattled the industry in the Southeast in December …

Thinking Outside the Box With Satsumas

Josh McGill Cold Hardy

Satsuma mandarins are big business in the Georgia and North Florida citrus industry. Satsumas are desirable from the consumer perspective, and the fruit’s cold hardiness is suited for the northern reaches of citrus production. Cold hardiness was proven to be especially important after freezes in late December and in January. But a problem with satsumas is that the fruit matures …

Freeze Recovery Advice

Josh McGill freeze

Winter Storm Elliott brought freezing temperatures to the cold-hardy region Dec. 24–28, 2022, resulting in significant injury to citrus. Danielle Williams, Muhammad Adnan Shahid and Mujahid Hussain, all with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), provided storm recovery advice in a recent edition of the Cold Hardy Citrus Connection newsletter. Following is a summary of …

A Look at South Carolina Citrus

Josh McGill Cold Hardy, Research

Citrus has been making its way north in recent years. So far, growers in North Florida and Georgia have had success producing the crop, with only minor incursions of HLB, the disease that has been devastating in Florida’s traditional citrus production areas. The Southeast Regional Fruit & Vegetable Conference, held in Savannah earlier this month, included a citrus program for …

Grower Sees More Damage From Season’s Second Freeze

Josh McGill Cold Hardy, freeze

Another freeze event last weekend could spell doom for some citrus trees produced in the cold-hardy citrus region. Kim Jones, president of the Cold Hardy Citrus Association, discussed the dire situation facing growers in the region. “I think we had some damage to some new growth that had come out from the last freeze. I can’t tell how much, but …

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 …

HLB Resistance Is Citrus Breeding Program’s Primary Focus

Josh McGill Breeding

Citrus breeding is conducted at different research facilities across Florida. But the objective remains the same for University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) breeders: Develop HLB-resistant citrus. That is the goal for Jose Chaparro, UF/IFAS associate professor in Gainesville. His research will impact citrus produced in the North Florida and South Georgia regions. “If you look …

Citrus Breeder: Growers Need to Think More Out of the Box

Tacy Callies Cold Hardy

If cold-hardy citrus growers diversified their crops and not put all of their eggs in the satsuma basket, it would provide them a better chance at long-term sustainability. It would allow producers an opportunity to combat the negative national stigma concerning citrus juices, says Jude Grosser, a professor of plant cell genetics at the University of Florida Institute of Food …

Peel Protection Key for Citrus Growers

Josh McGill Cold Hardy, Fresh

Citrus growers producing for the fresh market should always ensure their fruit’s peel remains unblemished and without defect. This will protect the fruit against infection and consumers choosing not to purchase the fruit. Mark Ritenour, professor of postharvest technology at the University of Florida Institute of Food and Agricultural Sciences, spoke during the recent Cold-Hardy Citrus Field Day at the …