Nelson Wulff of Fundecitrus recently signed a technical cooperation agreement between Fundecitrus and the National Center of Genetic Resources (Cenargen/Embrapa) for a project to develop biotechnological solutions for HLB. Wulff, coordinator of the Fundecitrus Biotechnology and Diagnostics Laboratory, signed the agreement at the 50th anniversary ceremony of Embrapa Genetic Resources and Biotechnology in Brazil. Embrapa Genetic Resources and Biotechnology has …
Costa Rican Orange Production
The U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) expects Costa Rican orange production to increase approximately 11% in 2024–25, to 250,000 metric tons. Production in 2023–24 was lower than expected at 225,000 metric tons as a result of erratic rainfall patterns associated with the El Niño weather phenomenon. The area planted in oranges is expected to remain unchanged …
Citrus-Derived Endophytes Have HLB Management Potential
Florida-based scientists published an article in Microorganisms indicating citrus-derived endophytes have potential for managing HLB. Endophytes are endosymbionts, often bacteria or fungi, which live within a plant for at least part of its life cycle without causing apparent disease. The authors of the article are Jessica Dominguez, Krishnaswamy Jayachandran and Kateel G. Shetty of Florida International University, and U.S. Department …
Transforming Organic Citrus Production
Organic citrus growing presents unique hurdles in Florida, Texas and other southern states. Poor soil quality, nutrient deficiencies and a limited range of pest control options plague organic production. But the University of Florida Institute of Food and Agricultural Sciences’ (UF/IFAS) Davie Kadyampakeni is poised to transform the future of organic citrus growing. He aims to do that with a …
Management of the Invasive Peanut Snail in Citrus
Two University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers and an Extension agent authored an article in the Cold Hardy Citrus Connection about the invasive peanut snail in citrus. The authors are Xavier Martini, associate professor of entomology; Issac Esquivel, assistant professor of entomology; and Extension agent Danielle Williams. Excerpts follow. Bulimulus bonariensis (also known as Bulimulus …
Parasites Fight Citrus Gall Wasps
Jianhua Mo, a research entomologist with Australia’s New South Wales Department of Primary Industries (NSW DPI) authored an article about the release of parasitic wasps for the control of citrus gall wasps (CGW). Edited excerpts follow: CGW is a pest of major concern in the southern citrus-growing regions of the Riverina, Sunraysia and Riverland. With the exception of the adult …
Pest Management in CUPS
By Jawwad Qureshi The Asian citrus psyllid (ACP, Figure 1) continues to feed on citrus trees infected with citrus greening and spread the disease to newly planted young trees. Therefore, it is not possible to produce a healthy citrus tree in an environment where citrus greening is endemic. Only the citrus under protective screen (CUPS, Figure 2) system allows the …
CITRUS NURSERY SOURCE: Georgia Citrus Association Annual Meeting Focused on HLB and More
By Peter Chaires The Georgia Citrus Association held its seventh annual meeting on Feb. 27 at the University of Georgia (UGA) campus in Tifton. As usual, the event was well organized and well attended. The agenda included topics such as: It was a value-packed day. HLB RECOMMENDATIONS Roger Smith of TreeSource Citrus Nursery in Woodlake, California, traveled quite a distance …
Florida Citrus Part of USDA Plant Protection Funding
The U.S. Department of Agriculture (USDA) is allocating more than $5 million to Florida for plant-health protection. The funding is part of a nationwide effort to strengthen the country’s infrastructure for pest detection, surveillance and mitigation, as well as protect the U.S. nursery system. Through the authority of the Plant Protection Act (PPA) Section 7721, USDA is providing more than …
California’s CRaFT Accepting Cycle 2 Applications
California’s Citrus Research and Field Trials (CA-CRaFT) program is now accepting Cycle 2 applications from commercial growers. This initiative aims to showcase the efficacy of additional control measures against the Asian citrus psyllid (ACP). ACP is the carrier of the Candidatus Liberibacter asiaticus bacterium causing huanglongbing (HLB) disease in citrus. For Cycle 2, applications will be accepted until program capacity …
Costa Rica Orange Production to Decline
Production of oranges in Costa Rica in 2023–24 is expected to decline 15% from the prior year to 250,000 metric tons (MT), the U.S. Department of Agriculture’s Foreign Agricultural Service (USDA FAS) reported. The decline is a result of unfavorable weather conditions in Northern Costa Rica associated with an El Niño weather system. Two companies, TicoFrut and Del Oro, control …
Biopesticide Products Patented
Research by Rhodes University PhD graduates Tamryn Marsberg and Michael Jukes has led to the patent of two viral-based products. MultiMax and CodlMax are alternatives to chemical pesticides on citrus, apples and litchi. The advantage of these products includes their lack of non-target effects; the pest is controlled without harming the environment. The products could assist with control of the …
Diaprepes Root Weevil Update for Florida
Florida’s populations of Diaprepes abbreviatus root weevil have been uncharacteristically low so far in 2023, entomologist Lauren Diepenbrock reported recently. The adult pests are normally active in April–May and in the fall, the University of Florida Institute of Food and Agricultural Sciences assistant professor noted. Prior to the discovery of HLB disease in Florida in 2005, growers who had extensive …
Update on Snail Management in Citrus
By Lauren Diepenbrock Snail management is becoming a more common discussion in Florida citrus with the arrival of a newer species (Bulimulus bonariensis, previously referred to as Bulimulus sporadicus, Figure 1) in the Southeast. This snail is a new challenge for citrus growers. With funding from the Citrus Research and Development Foundation, the University of Florida Institute of Food and …
Reduce Pests With Natural Enemies
By Jawwad Qureshi A wide range of pests colonize citrus crops. Most of these species target tree canopies, and a few feed on the roots. Damage is either direct through feeding on the plant tissues or it can be twofold if the pest is also responsible for transmitting the pathogens of a disease or making conditions favorable for the disease …
Pair of Problems for Louisiana Satsumas
Plant Diagnostic Center Director Raj Singh at the Louisiana State University Agricultural Center (LSA AgCenter) recently addressed two stresses that impact yields in Louisiana citrus — internal dry rot and puffy fruit. INTERNAL DRY ROTMature fruit affected by internal dry rot may look healthy on the outside, but peeling the fruit reveals dry, discolored flesh. This internal dry rot is …
Silicon Being Evaluated for North Florida Citrus
The element silicon, known to be beneficial to many plants, is being evaluated for advantageous effects on North Florida citrus and blackberries. Horticulturist Muhammad Shahid discussed the benefits of Earth’s second-most-abundant element (after oxygen) during a recent Cold-Tolerant Citrus Production Workshop in Perry, Florida. Shahid is a University of Florida Institute of Food and Agricultural Sciences assistant professor at the …
Changing Psyllids to Make Them Incapable of Spreading HLB
By Kirsten S. Pelz-Stelinski and Lukasz L. Stelinski Managing Asian citrus psyllids (ACP) remains a consideration for growers because psyllids transmit the citrus greening disease pathogen, Candidatus Liberibacter asiaticus (CLas), to newly planted trees. There are several tools that can reduce psyllid populations or mitigate the symptoms of HLB and improve the health of infected trees. However, additional methods that …
California CRaFT Project Targets Psyllids
All commercial citrus producers in California are invited to apply for participation in the Citrus Research Board’s (CRB) California-focused Citrus Research and Field Trials (CA-CRaFT) project. The overarching goal of CA-CRaFT is to demonstrate the effects of additional mitigations on Asian citrus psyllid control within commercial citrus groves across the various citrus-growing regions in California. The project is supported by …
A Two-Pronged Approach to Suppress Psyllids
By Bryony C. Bonning and Lukasz L. Stelinski Asian citrus psyllids (ACP) transfer the pathogen that causes citrus greening from plant to plant as they feed. After confirmation of citrus greening in Florida in 2005, growers intensified their use of insecticides against ACP to try to stop disease spread. However, this method alone has yielded variable success and increased costs. …