Citrus greening. Canker. Black Spot. Nutrition challenges. Finding HLB tolerant varieties. This website provides ideas and practices that growers can implement today to increase their fruit yield, protect their groves and improve fruit quality.

  • Ongoing Research

    Learn about some of the ongoing HLB-related research projects being conducted by the faculty of UF/IFAS.

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UF Glow variety of citrus. Photo taken 11-17-17

Establishing New Plantings

UF/IFAS breeders have identified HLB tolerant varieties that growers should consider when replanting. Key research on the best rootstock and scion selection for grove soil and location, managing tree health through fertilization, irrigation, and attention to root health, and pest management is available.

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Mechanical orange harvester in a private grove near Immokalee.

Maintaining Yields in Existing Groves

Implementing best management practices supported by recent research is the best defense against citrus diseases. Integrated horticultural practices of irrigation, fertilization, root health and canopy management combined with pest management techniques and weed management is critical in the fight against citrus diseases.

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Citrus groves. UF/IFAS Photo: Thomas Wright.

Implementing the Cover Under Protective Screen (CUPS) System

The Citrus Under Protective Screen (CUPS) growing strategy for fresh fruit has produced results that confirm strong fruit production with high quality in systems of screen house-grown citrus. Recent research projects found that the screen house-grown citrus (in houses of approximately 20 acres) remained free of Asian citrus psyllid (ACP) for every weekly inspection in 2017-2018. There were no detectable cases of HLB disease in the screen house both by visual or PCR testing after nearly four years. This is a viable alternative for fresh fruit growers.

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Read the recent UF/IFAS 2019 Citrus Production Guide

Beginning this week, Florida citrus growers will have an updated resource to help them keep groves productive despite the ever-present threat of Huanglongbing, the bacterial malady also known as HLB or citrus greening disease.

Experts with the University of Florida Institute of Food and Agricultural Sciences have just completed a 180-page technical handbook, “Florida Citrus Production Guide 2019-2020.”



The UF/IFAS statewide citrus monthly newsletter is designed to provide growers and industry stakeholders the most current information related to UF/IFAS citrus research and Extension activities.  Our goal is to provide you with up-to-the-minute research results, new ideas, and current recommendations you can use to help keep your groves in production despite the challenges posed by HLB.