Researchers at the resurrected Millennium Block at Fort Pierce will assess the performance of new grapefruit cultivars and evaluate numerous rootstocks in the face of HLB. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researcher Rhuanito “Johnny” Ferrarezi discusses the history of the block and research planned there. The block is called Millennium because some researchers planted variety …
Rootstock Effects on Valencia and Hamlin in Large-Scale Commercial Plantings
By Ute Albrecht, Sudip Kunwar and Jude Grosser Prior to 1865, the only rootstocks used in Florida were sour orange and sweet orange. Use of grafted trees instead of seedling trees became necessary because of the devastating effects of phytophthora on sweet orange. Sour orange was widely used as a rootstock because of its resistance to phytophthora and other positive …
UCR Scientists Say New Peptide Could Control HLB
According to a news article released by the University of California Riverside (UCR), scientists there have found a substance which may be capable of controlling citrus greening disease. The disease, also known as huanglongbing (HLB), has devastated citrus in Florida and in other regions worldwide. It also threatens California crops. The article says the new treatment effectively kills the bacterium …
Protect Outdoor Workers From Heat Illness
California’s Division of Occupational Safety and Health (Cal/OSHA) reminds all employers to protect outdoor workers from heat illness and to monitor high temperature advisories and warnings in their region. California’s heat illness prevention standard applies to all outdoor workers, including those in agriculture, construction and landscaping. Other workers protected by the standard include those that spend a significant amount of …
The Ins and Outs of Tango
The relatively mild winter conditions over the last two decades have led to a resurgence of interest in cold-hardy citrus in Florida. Growers were looking for a low-seeded citrus variety that was sweet, easy to peel and had moderate cold tolerance. In 2009, the first Florida nurseries were licensed to grow Tango, a low-seeded (less than five seeds per fruit …
Psyllids May Give a Year’s Warning of HLB
Although huanglongbing (HLB) disease was detected in Florida citrus in 2005, the HLB bacterium wasn’t found in Texas until 2011, when scientists detected it in Asian citrus psyllids (ACP). The disease wasn’t found in Texas citrus trees until 2012, suggesting that the HLB-spreading psyllids may be used for early detection of the pathogen in newly invaded areas. Factors influencing the spread …
Coming Attraction: Florida Finger Limes
Sweet oranges. Ruby red grapefruit. Sugar Belle mandarins. When one thinks of Florida citrus, these fruits immediately come to mind. But finger limes? A University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researcher believes that finger limes may be the next food trend that will continue to fortify Florida’s role as a citrus producer for the world. Manjul …
Lemons Hit Hard by COVID-19 Losses
Lemon growers are seeing good production this year, but the market for choice lemons has been ruined by COVID-19 food-service industry losses. “We’ve seen 20 to 25 percent decrease in fruit movement, and that’s mainly attributable to the decline in the food-service industry,” according to Ventura County lemon grower Will Pidduck. Ironically, it is otherwise a good year for lemons …
Watch Out for Invasive Species
By Clint Thompson April is Invasive Plant Pest and Disease Awareness Month, and the United States Department of Agriculture (USDA) wants help in identifying invasive species that threaten the food supply and cause plant diseases. Samantha Simon, USDA’s executive director of emergency and domestic programs, says invasive species can threaten agriculture and many farming operations, especially in the Southeast. She …
Florida Sees Dips in Orange and Grapefruit Forecasts
The 2019–20 Florida all-orange forecast released on April 9 by the U.S. Department of Agriculture is 70 million boxes, down 1 million boxes from the March forecast. This represents a 1 percent decrease in the expected orange crop size. Non-Valencia Oranges The forecast for Florida non-Valencia orange production is unchanged at 30 million boxes. The non-Valencia harvest is about over …
CDFA’s Year in Review
The mission of the California Department of Food and Agriculture (CDFA) is to promote and protect the food supply, enhance trade and protect the environment. The agency annually provides information on the steps it takes to fulfill its mission goals. In such a diverse and highly populated state, the challenges are great. Much of the growing regions are geographic islands …
Food-Safety Marathon: Keeping Up With the Produce Safety Rule
By Travis Chapin, Matt Krug and Michelle Danyluk It’s been four years since the final Produce Safety Rule (PSR) was published in the Federal Register. The further we get into implementation of the PSR, the more it really seems like a marathon and not a sprint. By January 2020, all operations covered under the PSR should be complying with applicable …
Bayer-CRDF HLB Effort Updated
The Citrus Research and Development Foundation (CRDF) in 2017 agreed to partner with Bayer Crop Science for three years in an effort to develop new technologies to combat HLB. On Dec. 3, a Bayer representative provided a progress update to the CRDF board of directors. CRDF Chief Operating Officer Rick Dantzler discusses the history and possible future of the endeavor. …
Reintroducing White Grapefruit to the U.S. Market
(IMG) — IMG Citrus, a family-owned, vertically integrated citrus grower, packer and shipper in Vero Beach, Florida, is reintroducing white grapefruit to the U.S. market. Most white grapefruit is exported directly from the United States to its primary market in Japan, where it maintains consistently high popularity. However, IMG Citrus will be expanding its white grapefruit consumer base to the …
New Grapefruit Rootstock, Scion Experiment
The world’s peerless grapefruit grows in the Indian River Citrus District. Balanced with sugar and tart, and a thin rind for easy peeling, the fruit is sold mostly for export to European and Asian markets, where it is a high-price delicacy. But the once-thriving industry is in decline, and a plant pathogen is present in all of the state’s grapefruit …
Orange Production Up Slightly From June Forecast
ORANGESThe 2018–2019 Florida all-orange forecast released by Mark Hudson of the U.S. Department of Agriculture (USDA) is now 71.6 million boxes. The total is comprised of 30.4 million boxes of non-Valencia oranges (early, mid-season and Navel varieties), unchanged from the June forecast, and 41.2 million boxes of Valencia oranges, up 200,000 boxes from last month. California non-Valencia oranges remained at …
Value of HLB Research Conference
Rick Dantzler, chief operating officer of the Citrus Research and Development Foundation in Florida, discusses the importance of the recent International Research Conference on HLB, held in California. “I think there’s real merit in the industry, nationally and internationally, getting together occasionally to talk about what’s going on in their home states and their home countries,” Dantzler says. He notes …
ACP Found in Sacramento
The California Department of Food and Agriculture (CDFA), working in cooperation with the Sacramento County agricultural commissioner, has placed Sacramento County under a plant pest quarantine for the Asian citrus psyllid (ACP) following the detection of one ACP in Sacramento’s Lemon Hill area. The quarantine prohibits the movement of citrus and curry leaf tree nursery stock and all plant parts, …
Researching Scouting Strategies for ACP
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 …
Automated System Under Study to Deliver Bactericides
Imagine using a robotic arm to grip and puncture the trunk of a citrus tree to deliver chemicals into the vascular parts of the plant, reducing its susceptibility to the citrus greening disease. Ozgur Batuman, an assistant professor of plant pathology at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), leads a team of researchers trying to …



























