Strategies for Stronger Roots

Tacy CalliesRoot health

Citrus growers discuss production practices to improve root health. By Tacy Callies What began as an experiment in Ben Krupski’s 10-acre grove in Howey-in-the-Hills, Florida, is now a common practice he uses as production manager for Lennon Grove Service. Four years ago, Krupski started testing the use of compost in his small leased block of Hamlin trees. In the first …

weather

Helping Generations Cope with Freezes

Ernie Nefffreeze, 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 …

acp

Researching Scouting Strategies for ACP

Daniel CooperCitrus, Psyllids

Several research projects continue at University of California Riverside to evaluate strategies for better detection of Asian citrus psyllid (ACP). Monique Rivera, assistant cooperative Extension specialist, is looking into something referred to as the ‘edge effect’ and how it pertains to ACP control. “The ‘edge effect’ is basically an ecological term that we’re using in the context of Asian citrus …

forecast

Grower Replanting Initiative Program for HLB in the Works

Ernie NeffHLB Management

Editor’s Note (Feb. 20, 2019): The name of the program has been changed from the Grower Replanting Initiative Program to the Citrus Research and Field Trial Program. According to Florida Citrus Mutual CEO Mike Sparks, the U.S. Department of Agriculture (USDA) has given “concept approval” for massive Florida grower field trials to determine what existing research might work in the …

Fungal Foliar Disease Concerns for 2019

Tacy CalliesDiseases

By Megan Dewdney The Florida citrus-growing seasons of 2017 and 2018 were quiet in terms of fungal foliar disease outbreaks. Small pockets of severe disease occurred sporadically, but there were no widespread reports of diseases like postbloom fruit drop, much to the relief of the industry. Greasy spot has flared up in a few locations on cultivars like Valencia, and …

podcast

Rogers on HLB Research and Education

Ernie NeffHLB Management

Michael Rogers, director of the Citrus Research and Education Center, discusses HLB research and education programs being conducted by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). “The goal of our IFAS citrus program continues to be to provide growers with the most up-to-date information that they can use to help maintain or increase the production of …

psyllid

IPM as an Economic Strategy

Ernie NeffIPM

Many citrus growers think integrated pest management (IPM) is all about reducing pesticide use. Not so, University of Florida Institute of Food and Agricultural Sciences entomologist Lukasz Stelinski told growers recently. “IPM is a system to achieve sustainable agriculture, and it’s very much based in economics, where a damage threshold or economic injury level is identified,” Stelinski said. Once a …

pests

Pests on the Horizon

Ernie NeffPests

A shift toward reduced use of insecticides in Florida groves could lead to the emergence of pests that haven’t generally been a problem for years, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomologist Lauren Diepenbrock said. Pests that could return or emerge in the face of reduced insecticide use include scales, mealybugs, false spider mites and fruit …

pests

How to Identify and Avoid Nutrient Deficiencies

Ernie NeffNutrition

  Nutrient deficiencies are common in HLB-affected trees, which make up the vast majority of Florida citrus trees. At a recent Citrus Nutrition Day in Bartow, University of Florida Institute of Food and Agricultural Sciences researcher Arnold Schumann discussed ways to identify and avoid nutrient deficiencies. A common identification method for nutrient deficiencies is direct observation, “walking through your grove, …

HLB Reduction Strategies

Tacy CalliesHLB Management

By Jawwad Qureshi, Lukasz Stelinski and Fernando Alferez Management of huanglongbing (HLB) has focused on reducing the vector Asian citrus psyllid (ACP) and improving tree health, thus requiring a multi-pronged approach. Several elements of an HLB management system are either available or under current investigation. Maintenance of clean nursery stock, vector management and tree nutrition are widely implemented, while incorporation …

Growers Share Nutrition Successes

Ernie NeffNutrition

At the Dec. 11 Citrus Nutrition Day hosted by the University of Florida Institute of Food and Agricultural Sciences Polk County Extension, two growers shared their experiences with nutrition programs. The citrus growers, James Shinn of Shinn Groves/Tree O’Groves Inc. and Matt Story of the Story Companies, shared their knowledge via video interviews with citrus Extension agent Chris Oswalt. Oswalt …

Taking Technology to the Grove

Tacy CalliesCUPS, Technology

By Ernie Neff Jerry Mixon’s use of netting to keep birds from blueberries helped pique his interest in growing citrus under protective screen (CUPS) to exclude HLB-spreading psyllids. But he credits University of Florida researcher Arnold Schumann with helping him bring his Polk County CUPS project to fruition. Mixon met Schumann in 2015, the year after Schumann’s 1-acre CUPS was …

Vigilance Keeps HLB at Bay

Tacy CalliesCalifornia Corner

By Len Wilcox California agriculture has long kept a watchful eye on the spread of HLB (huanglongbing or citrus greening disease). It’s a firestorm on the horizon, and the devastation the disease has wrought in Florida and other parts of the world has the full attention of California citrus growers. Working closely with industry leaders and grower groups, federal, state …

Increasing Yield Through High-Density Plantings

Tacy Calliesplanting

By Rhuanito Ferrarezi, Alan Wright and Arnold Schumann High-density plantings have been tested worldwide in advanced citrus production systems (ACPS) to increase efficiency of water, fertilizer and light, and to maximize yield per area. After the onset of huanglongbing (HLB) in Florida, canopy growth reduced drastically due to negative impacts on plant health, creating the need for new plant spacing …

Orange Imports Increase as Domestic Juice Supply Remains Squeezed

Tacy CalliesIndustry News Release

Until a solution for citrus greening is found, imports will be key to keeping Florida’s citrus industry afloat. Domestic orange production has been declining steadily over the last two decades, with citrus greening disease being the leading cause of decreased acres and productivity. As the gap between domestic production and consumption has widened, imports have increased to boost dwindling domestic …

A Day in the Life of a UF/IFAS Extension Agent: Juanita Popenoe

Daniel CooperCitrus, Industry News Release, Research

When growers in Central Florida need help with an alternative crop to citrus, they turn to Juanita Popenoe. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Extension agent spends her days helping farmers who are looking for options to diversify their groves impacted by citrus greening disease. “Since citrus greening has hit the industry so hard, citrus …

crop forecast

Mutual President on Crop Forecast and Tree Health

Ernie NeffCrop Forecast

Tom Mitchell of Riverfront Packing Company in Vero Beach, who serves as Florida Citrus Mutual president, discusses the crop forecast for Florida citrus. The Florida forecast for 79 million boxes of oranges and 6.7 million boxes of grapefruit was issued Oct. 11 by the U.S. Department of Agriculture’s National Agricultural Statistics Service. “I’m primarily a fresh grapefruit grower,” Mitchell says, …

Effects of Homobrassinolides on HLB-Affected Trees in Florida

Tacy CalliesHLB Management, Research

By Fernando Alferez, Christopher Vincent and Tripti Vashisth In the current scenario of widespread infection and severe symptoms of HLB in Florida, horticultural practices that improve plant health in the presence of the disease are needed. For this reason, we sought to follow up on reports of positive effects of a brassinosteroid on infected plants. Brassinosteroids are a relatively newly …

PFD

Lake Wales Grower Discusses Foot Rot and PFD

Ernie NeffDiseases, PFD

Lake Wales citrus grower Frank Thullbery, 88, says groves in his area have suffered badly from foot rot, or phytophthora, in recent years. He has also struggled with postbloom fruit drop (PFD). “I’ve seen half of the groves gone bad from foot rot, and a lot of people are not replacing their trees when they pull them out,” Thullbery says. …

HLB Early Detection Methods Available Now; More Coming Soon

Tacy CalliesCalifornia Corner, HLB Management

By Len Wilcox Early detection has become a vital line of defense in the California citrus grower’s war with huanglongbing (HLB) disease. Without careful monitoring, any tree in the grove can become a ticking time bomb that could lead to destruction of the entire orchard. The disease starts unnoticed. Many months can pass before a tree displays any visible evidence …