An Update on UF/IFAS-Grower Citrus Nutrition Trials

Tacy Callies Nutrition

By Tripti Vashisth Mineral nutrition plays an essential role in a plant’s life cycle and is critical for its growth and development. Since the early 19th century, the importance of mineral nutrition for plants has been recognized, and fertilization has become an important aspect of crop production. At least 17 mineral nutrients are considered essential for plants. These include carbon, …

Orange Forecast Drops for Florida and California

Taylor Hillman Citrus, Crop Forecast

The citrus crop forecast, delivered by Mark Hudson of the U.S. Department of Agriculture’s (USDA) National Agricultural Statistics Service in Washington, D.C., showed a 4 percent drop in Florida oranges and a 2 percent drop in California oranges. In total, the U.S. all-orange forecast for the 2016-2017 season dropped 3 percent from last month and is down 13 percent from …

Managing the Health and Productivity of HLB-Affected Groves

Tacy Callies HLB Management

By Tripti Vashisth In 2005, huanglongbing (HLB or citrus greening disease) was first discovered in Florida. Florida orange production changed from 242 million boxes in the pre-hurricane, pre-HLB, 2003–2004 season to 81.5 million boxes in 2015–2016. This dramatic reduction in yield is attributable to multiple causes, including a reduction in citrus acreage, citrus canker and other citrus diseases. HLB is …

Control of Stem-End Rot of Fresh Citrus

Tacy Callies Diseases

By Mark A. Ritenour, Jiuxu Zhang and Megan M. Dewdney Decay of fresh citrus fruit is most often caused by fungal pathogens that grow and develop in the hot and wet conditions typical in Florida. While green and blue molds (Penicillium digitatum and Penicillium italicum) and sour rot (Galactomyces citri-aurantii) are the most common postharvest citrus diseases worldwide, the subtropical …

Pruning to Rehabilitate HLB-Affected Sweet Orange Trees

Josh McGill Citrus

By Tripti Vashisth and Troy Gainey In the last 11 years, Florida orange production has declined more than 60 percent. This dramatic reduction in yield is attributable to multiple causes, including loss of citrus acreage in the state, citrus canker and other diseases, but huanglongbing (HLB) is now recognized as the primary reason for declining citrus yields. HLB-affected trees are …

Citrus Forecast Has Valencia Oranges Up Slightly

Kelsey Fry Citrus

The final citrus crop forecast of the 2015-16 season, issued by Mark Hudson of the U.S. Department of Agriculture’s Agricultural Statistics Board, is up 100,000 boxes, now at 81.5 million boxes. The total comprises 36.1 million boxes of non-Valencia oranges (early, mid-season, Navel and Temple varieties), unchanged from last month, and 45.4 million boxes of Valencia oranges, up 100,000 boxes …