Controlling HLB-spreading Asian citrus psyllids along grove borders can be part of a cost-efficient psyllid control program, says University of Florida Institute of Food and Agricultural Sciences entomologist Lukasz Stelinski. “Psyllids are found in borders in much greater frequencies than any other place within the grove,” Stelinski says. “This is a place that they congregate … Anything that helps protect …
Using Organic Insecticides for Psyllid Control
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 Grower Sees Success with Cover Crops
By Juanita Popenoe and Lauren Diepenbrock Ed James has citrus in his veins. He has been working and thriving in the citrus business since he was a teenager — from hoeing orange trees to owning a caretaking business that serviced thousands of acres. That is, until about eight years ago. In 2010, James looked around his personal 45-acre citrus grove …
$3.5 Million Donation to Aid California Citrus Collection
The University of California, Riverside (UCR) has received a $3.5 million donation from Givaudan to support UCR’s Citrus Variety Collection. The gift will help build a screened structure to protect the collection from the impending threat of citrus greening disease, also known as huanglongbing (HLB). The 2.8-acre protective screened structure will house new trees and back-up collections of the UCR …
Study Zeroes in on Organic Ways to Beat Citrus Greening
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 …
Recent Pest Concerns in Florida Citrus
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 …
Sneak Peek: January 2019 Citrus Industry Magazine
It’s no secret that the most damaging pest in Florida citrus is the Asian citrus psyllid. But there are other bugs growers need to watch out for, too. The January issue of Citrus Industry magazine takes a look at current pests of concern and offers management methods. An article on HLB reduction strategies focuses on tools growers can use to …
California Citrus Conference Calls Attention to Key Industry Issues
By Len Wilcox The Citrus Research Board’s (CRB) annual California Citrus Conference took place in October in Visalia. This year’s event included a celebration of the organization’s 50th anniversary. The CRB is an important resource to California’s citrus industry. It awards more than $7 million each year to researchers throughout the state. Since 2008, CRB has focused much of its …
Kaolin Clay May Be Viable Option to Protect Citrus Trees from ACP
Florida citrus growers have begun taking notice of kaolin clay, a powdery white compound, because it can cause Asian citrus psyllids (ACP) to “not take notice” of their groves. Long used to protect other fruit and vegetable crops, kaolin can also conceal citrus trees from hungry psyllids by confusing their visual sensory system, said Michael Rogers, director of the Citrus …
Research Update: Citrus Under Protective Screen
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 …
New UF/IFAS Entomologist: From a Kid’s ‘Lab’ to Helping Citrus Growers
As a girl in her garage in Palm Bay, Florida, Lauren Diepenbrock, already a budding scientist, peered through the lens of her microscope and marveled at the magnification. “As a kid, I played in the woods and brought back all sorts of ‘finds,’ including a snake skeleton, none of which my mom allowed in the house,” said Diepenbrock, an assistant …
Citrus Tree Covers Keep Deadly Psyllids Away
University of Florida (UF) scientists are finding that by covering new citrus trees with mesh, they can keep disease-carrying insects from harming the plants. That could be a big step toward stemming the deadly citrus greening disease, UF Institute of Food and Agricultural Sciences (IFAS) researchers say. Asian citrus psyllids can infect the citrus trees with greening, also known as …
CUPS Protects Citrus from HLB and Storms
A system designed to protect citrus trees from the deadly greening disease withstood the ravaging winds of Hurricane Irma last year, University of Florida scientists say. With reinforcements installed after the storm, they’ll likely withstand even more dangerous storms. Using citrus under protective screening (CUPS), growers can keep the Asian citrus psyllids away from their trees, said Arnold Schumann, a …
Why Citrus Growers Should Keep Spraying for Psyllids
For several years after HLB was detected in Florida in 2005, most citrus growers and researchers agreed that it was essential to spray aggressively for the Asian citrus psyllids that spread the disease. In recent years, however, many growers have questioned whether it still makes sense to spray for psyllids when 100 percent of groves are infected, as is the …
Combating Citrus Greening with Fungus
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 …
Citrus Expo Presentations Now Available
The 27th annual Citrus Expo saw great success as growers piled into the Lee Civic Center on Aug. 15–16 in North Fort Myers, Florida. Growers experienced the biggest trade show in Citrus Expo history, as well as extended citrus seminar sessions. The educational program, titled “Planting Tomorrow’s Profits,” featured presentations on the latest research from the University of Florida Institute …
Florida Citrus Acreage Declines Again
Florida’s citrus acreage continued a long descent in 2018, decreasing 2 percent to 447,012 acres. The total number of acres is the least since the U.S. Department of Agriculture’s National Agricultural Statistics Service began keeping count in 1966. The 2018 count was released on Aug. 28. There was a gross loss of 20,114 acres in 2018, partially offset by new …
Control of Citrus Flush Timing Could Improve Psyllid Control
They say timing is everything in life, and that’s certainly true of the Asian citrus psyllid, which has devastated Florida agriculture for the past decade by transmitting citrus greening disease, also known as huanglongbing or HLB. To reproduce, this small, flying insect must lay eggs on citrus “flush” – the tender new leaves and shoots that citrus trees produce several …
UF/IFAS Researchers Search for Solutions to Citrus Diseases with Citrus Initiative Funds
From nutritional supplements to managing irrigation to grower outreach and education, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are finding additional ways to support Florida citrus growers in their fight against citrus greening disease. Twelve projects were funded by the state legislature-funded Citrus Initiative program in 2017-2018 that looked at possible short- and long-term solutions that …
System Stops Psyllid Travel
By Len Wilcox Researchers with the U.S. Department of Agriculture (USDA) believe that an effective measure has been found that will reduce the risk of spreading huanglongbing (HLB) disease between orchards. The control measure is a fogging system with a carrier and a pesticide that effectively destroys disease-bearing insects before they can leave the orchard and do further harm. NO …