florida

HLB Voluntary Controls for California Growers

Len WilcoxCalifornia Corner, HLB Management

The Citrus Pest & Disease Prevention Committee of the Citrus Research Board (CRB) has endorsed a list of voluntary actions growers can undertake if HLB-infected trees are found in their vicinity. The voluntary actions go beyond the required regulatory response. Beth Grafton-Cardwell, entomologist with University of California Riverside, explained the recommendations during a recent interview with AgNet West multimedia journalist …

Putting IPM Back in Citrus

Tacy CalliesIPM

By Lukasz L. Stelinski, Jawwad A. Qureshi and L. Gene Albrigo Florida citrus production has a long and trailblazing history of implementing integrated pest management (IPM). In 1950, the director of the Florida Citrus Experiment Station, A.F. Camp, proposed an “Ecological Survey of Citrus Pests and Disorders” to provide a comprehensive survey of the ecology of citrus groves throughout Florida …

Precision Agriculture Technologies in Citrus

Tacy CalliesPests, Psyllids, Research, Technology

By Yiannis Ampatzidis Citrus growers face issues from an increasing number of pests and diseases. Rapid and accurate tools for early pest and disease detection are needed to improve precision and timely management. Almost all agrochemicals (e.g., pesticides) applied in specialty crop production are made uniformly with conventional spraying equipment, despite the fact that pathogen distribution is typically patchy. Uniform …

acp

Psyllid Control and Endemic HLB

Ernie NeffHLB Management, Pests, Psyllids

In the early days of HLB in Florida, virtually all researchers and growers agreed that nothing was more important than controlling HLB-spreading Asian citrus psyllids. But once HLB had spread to every grove (become endemic), many growers began questioning whether continued psyllid control was necessary. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomologist Lukasz Stelinski tackled that …

long-horned beetle

Psyllid Management for HLB

Ernie NeffHLB Management

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomologist Lauren Diepenbrock reports on Asian citrus psyllid (ACP) management studies being conducted around the world. Her report covers presentations made at the International Citrus Research Conference on HLB in March. She summarized the international scientists’ observations at the Florida Citrus Growers’ Institute in Avon Park last month. She shares …

psyllids

Using Organic Insecticides for Psyllid Control

Ernie NeffOrganic, Pests

Organic insecticides rotated with either spray oil or insecticidal soap provided good Asian citrus psyllid (ACP) suppression in long-term studies in Florida, entomologist Jawwad Qureshi reported recently. Qureshi is a University of Florida Institute of Food and Agricultural Sciences researcher at the Southwest Florida Research and Education Center in Immokalee. Suppression of ACP is important because the pest spreads citrus …

citrus greening

Study Zeroes in on Organic Ways to Beat Citrus Greening

Daniel CooperCitrus Greening, HLB Management, Industry News Release, Research

Results show promise for organic groves, but more research is needed. Since it was first discovered in the United States in 2005, the bacterial disease known as citrus greening, or Huanglongbing, has devastated millions of acres of citrus crops throughout this country and abroad, ravaging citrus groves in Asia, Africa and South America. Citrus greening has impacted conventional and organic …

psyllids

California HLB Detections Increased in 2018 as Monitoring Efforts Intensified

Tacy CalliesHLB Management

Huanglongbing (HLB) may have been found in significantly more citrus trees in 2018, but improved sampling and monitoring offer a reason as to why HLB detections increased so dramatically. In 2018, the California Department of Food and Agriculture’s Citrus Pest and Disease Prevention Program (CPDPP) redoubled efforts to limit the spread of HLB and its vector, the Asian citrus psyllid …

Government Shutdown Not Affecting California Citrus — Yet

Len WilcoxCalifornia Corner, Citrus

An analysis by California Citrus Mutual (CCM) indicates there is no major impact at the present time on government programs that affect California’s citrus industry. This could change if the shutdown drags on, however. According to the report, “Our major priority would be the ACP/HLB program sometimes known as CHRP (Citrus Health Response Program). We are not suffering any major …

Recent Pest Concerns in Florida Citrus

Tacy CalliesPests

By Lauren Diepenbrock While Asian citrus psyllids (ACP) are an ongoing concern in Florida citrus due to their role in spreading the bacterium associated with citrus greening, they are not the only pest of concern to growers. Citrus leafminer (CLM) and root weevils are two pests that have been raising concerns and adding to the challenge of managing productive citrus …

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 …

Researchers to Study New HLB Treatment Method

Len WilcoxCalifornia Corner

University of California (UC) Davis research scientist Louise Ferguson is taking part in a $3.4 million project titled “Development of an automated delivery system for therapeutic materials to treat HLB-infected citrus.” The study is funded by the U.S. Department of Agriculture’s National Institute of Food and Agriculture. The four-year project includes work by researchers at the University of Florida, UC …

grapefruit

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 …

Evergreen Pro Emergency Use Approved in California

Len WilcoxCalifornia Corner

The U.S. Environmental Protection Agency (EPA) has approved an emergency authorization requested by California Citrus Mutual (CCM) to use Evergreen Pro 60-6 (EPA Reg. No. 1021-1770). It was temporarily approved as a post-harvest treatment option for all citrus in California to prevent the spread of Asian citrus psyllids, the vector for huanglongbing. CCM had requested that citrus growers be allowed to use …

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 …

Research Update: Citrus Under Protective Screen

Tacy CalliesCUPS

By Arnold Schumann, Timothy Ebert, Laura Waldo, Danny Holmes, Napoleon Mariner, Gary Test, Chris Oswalt, Rhuanito Ferrarezi and Ricardo Lesmes Two studies with citrus under protective screen (CUPS) were established at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center (CREC) and Indian River Research and Education Center (IRREC) in 2013–14. The goal …

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 …

hlb

As California HLB Detections Rise, Priorities Refocus

Daniel CooperCalifornia Corner, Citrus, Citrus Greening, HLB Management

By Brian German A series of strategic planning sessions have helped to craft a more detail-oriented approach to address the spread of Asian citrus psyllid (ACP) and management of huanglongbing (HLB) detections. As of Oct. 9, there have been 906 positive HLB detections in California. “The real hot spot for us right now is Orange County. We’re finding a lot of HLB-positive …

psyllids

Combating Citrus Greening with Fungus

Tacy CalliesCitrus Greening

By Breanna Kendrick The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) is testing an insect-killing fungus to combat the Asian citrus psyllid (ACP). Pasco Avery, biological scientist at the UF/IFAS Indian River Research and Education Center in Fort Pierce, is researching the use of fungus-oil sprays and assessing the effects on ACP, the insect that transmits the …

New Regulations Costly to California Growers

Len WilcoxCalifornia Corner, Economics

New regulations will cost California citrus growers an average of $701 per acre per year, or $203 million annually statewide, according to a new study commissioned by the Citrus Research Board (CRB). “Compliance with environmental regulations not associated with groundwater sustainability is estimated to increase costs by $17.7 million, or $67 per acre of citrus,” predicts Bruce A. Babcock, a …