California Growers Reminded to Stay Alert

Len WilcoxCalifornia Corner, HLB Management

Jim Gorden, chair of the Citrus Pest and Disease Prevention Committee (CPDPC), is greatly concerned about the increase in sporadic Asian citrus psyllid (ACP) detections across California. Gorden sent an open letter to all citrus growers asking them to increase their vigilance against the pest and the risk of citrus greening, known as HLB disease. He said that “While the …

pests

Traditional and Alternative Leafminer Control Methods

Tacy CalliesPests

By Lukasz Stelinski The citrus leafminer (CLM) remains a major pest of citrus throughout Florida. The adults are small, white/silver-colored moths about half the size of a typical mosquito (Figure 1). Adults are difficult to spot due to their small size and because they are active only in the evening (dusk) and early pre-dawn hours. CLM adults can be monitored …

Dormant Sprays for Asian Citrus Psyllid Management

Tacy CalliesPsyllids

By Jawwad Qureshi Several studies have documented the positive effects of controlling the Asian citrus psyllid (ACP, Figure 1) for citrus tree health and sustainability in Florida. The mature blocks established before and after the discovery of huanglongbing (HLB) in 2005 continue to benefit from psyllid control. One psyllid is enough to infect a tree with HLB for life, and …

Sneak Peek: January 2021 Citrus Industry

Tacy CalliesSneak Peek

Now is the time of year for gifting fresh citrus to family and friends to enjoy. Unfortunately, people are not the only ones who enjoy eating citrus. Numerous pests can be found feasting on various plant parts in the grove. Keeping pests under control is the theme of the January issue of Citrus Industry magazine. Of course, the most concerning …

Update on CRISPR Research for Citrus Improvement

Tacy CalliesBreeding

By Nian Wang, Fred Gmitter and Manjul Dutt Nearly all commercially important citrus types — oranges, grapefruits etc. — have originated by mutations that have accumulated over several hundreds to thousands of years, from what once was an original, individual sweet orange tree and a single grapefruit tree. The many different cultivars that we know today are descended from those …

long-horned beetle

Growers’ Input on Pests Needed

Ernie NeffPests

Entomologist Lauren Diepenbrock is seeking Florida citrus growers’ help in determining information gaps and future directions for her research on pests. To get that help, she’s asking growers to participate in a survey, which is available here. Diepenbrock, a University of Florida Institute of Food and Agricultural Sciences researcher, would like to have growers take the survey by March 31, …

citrus

All In For Citrus Podcast, November 2020

Taylor HillmanAll In For Citrus Podcast, Sponsored Content

The November episode of the All In For Citrus podcast covers a multitude of grant-funded research that the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) citrus team both leads and collaborates on. Citrus Research and Education Center Director Michael Rogers begins the podcast with a discussion on research projects UF/IFAS scientists are playing critical roles in collaborative …

citrus

Scout IPCs for Pests

Tacy CalliesPests, Tip of the Week

By Jawwad Qureshi Young citrus trees produce shoots with feather-stage leaves more frequently, making them highly attractive to the Asian citrus psyllid (ACP). This pest requires young shoots with feather-stage leaves to develop and reproduce. ACP is the pathogen’s primary vector responsible for causing huanglongbing (HLB) disease. Plant infection with HLB at an early age makes it challenging to bring …

Five Years of Fresh Fruit Production in CUPS

Tacy CalliesCUPS

By Arnold Schumann, Laura Waldo, Napoleon Mariner and Timothy Ebert According to the U.S. Department of Agriculture (USDA), Florida grapefruit production for the 2019–20 season was only 12 percent of the production recorded in 2003–04, prior to the arrival of huanglongbing (HLB) disease in the state. A major goal of the University of Florida Institute of Food and Agricultural Sciences …

Controlling Psyllids: A Threshold Approach

Ernie NeffPsyllids

Citrus growers should consider controlling HLB-spreading Asian citrus psyllids (ACP) only when a prescribed ACP population, or threshold, is reached. Entomologist Lukasz Stelinski suggested this approach in a virtual Citrus Expo presentation. Stelinski is a University of Florida Institute of Food and Agricultural Sciences researcher at the Citrus Research and Education Center in Lake Alfred. A summary slide Stelinski showed …

UF/IFAS Gets $4.5M to Continue HLB Fight

Ernie NeffHLB Management

Three teams of scientists from the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) recently received nearly $4.5 million in U.S. Department of Agriculture (USDA) funds to study new ways to manage HLB. The funding is part of the $45 million in grants the USDA National Institute of Food and Agriculture’s Emergency Citrus Disease Research and Extension Program …

Potential Trap Crop for Asian Citrus Psyllid

Ernie NeffHLB Management

Pakistan entomologist Muhammad Arshad reported on work that opens the possibility of further studies to determine the potential of Cordia myxa as a trap crop to manage Asian citrus psyllid (ACP) and, ultimately, to reduce HLB disease. C. myxa, also known as Assyrian plum or lasura, is a broad-leaved deciduous fruit tree. In trap cropping, plants are used to attract …

Protecting Trees: Beyond CUPS and IPCs

Ernie NeffHLB Management

Many Florida citrus growers have been using individual protective covers (IPCs) for several years primarily to protect trees from HLB-spreading Asian citrus psyllids (ACP). Smaller but increasing numbers of growers are utilizing the more expensive citrus under protective screen (CUPS) system to protect trees from ACP and HLB. Recently, Fernando Alferez informed growers in a virtual presentation about some other …

Diversifying Citrus Pest Management

Ernie NeffPests

The use of chemicals for HLB-spreading Asian citrus psyllids (ACP) and other pests has raised several concerns, Jawwad Qureshi reported in a virtual Florida Citrus Growers Institute presentation. Those concerns include pest resistance, costs and diminishing biological control of pests, as well as concerns about health and the environment. Qureshi, a University of Florida Institute of Food and Agricultural Sciences …

psyllids

Psyllid Study to Determine Degree of HLB Risk

Len WilcoxCalifornia Corner, Psyllids

University of California Riverside Extension Specialist Monique Rivera said that funding for a new research project to study the Asian citrus psyllid (ACP) has been approved. The project will take a closer look at the phenology of huanglongbing (the citrus disease ACP spreads) and its prevalence in psyllid populations. The scientists will be looking for patterns that will help them …

florida

Area-Wide Pest Management of Florida Citrus

Tacy CalliesHLB Management

Ariel Singerman, University of Florida assistant professor, made an online presentation during the recent Agricultural and Applied Economics Association annual meeting. He shared his research on the implementation of area-wide pest management throughout the state of Florida. “Diminishment of pest populations by farmers on their own farm is the most widely used strategy for pest control. However, this is compromised …

California Citrus Movement Rules Amended

Len WilcoxCalifornia Corner, Regulation

The Citrus Pest & Disease Prevention Program, an agency of the California Department of Food and Agriculture (CDFA), has revised the rules governing shipment of citrus within the state. The rules are in place to protect commercial citrus groves from the threat of huanglongbing (HLB) disease. Effective July 31, 2020, bulk citrus fruit may be shipped directly to a packinghouse …

psyllids

IPM Approaches to Reduce Psyllid Populations

Tacy CalliesCitrus, Psyllids

Lukasz Stelinski recently shared integrated pest management strategies for reducing Asian citrus psyllid (ACP) populations to optimize tree health and yield. The University of Florida Institute of Food and Agricultural Sciences professor of entomology and nematology presented the information during the 2020 virtual Florida Citrus Industry Annual Conference. Even with approximately 100 percent of Florida citrus trees infected with huanglongbing …

climate

Kaolin Particle Films for Citrus Under HLB Pressure

Tacy CalliesHLB Management

Managing the Asian citrus psyllid (ACP) that spreads citrus greening disease (HLB) has become a crucial task at the forefront of much research. One management option that has proven to reduce ACP populations while increasing tree growth and yield is particle film. During the 2020 virtual Florida Citrus Industry Annual Conference, University of Florida Institute of Food and Agricultural Sciences …

acp

California Budget Includes HLB Funding

Len WilcoxCalifornia Corner

Funding for Asian citrus psyllid (ACP)/huanglongbing (HLB) programs and the Citrus Pest & Disease Prevention Division (CPDPD), an agency of the California Department of Food and Agriculture (CDFA), were included in the 2020-2021 California budget. Gov. Gavin Newsom signed the budget on June 29. The CPDPD, known also as the Citrus Division, utilizes state, federal and grower-generated funds to prevent …