Citrus Leafminer Sampling Techniques

Tacy CalliesPests, Tip of the Week

By Xavier Martini Citrus leafminer (CLM) is a recurring pest in citrus groves that lays eggs on new growth shoots (flush). After hatching, larvae penetrate directly into the leaf and begin feeding on sap and leaving a serpentine mine in the leaf. CLM population dynamics are mostly driven by flushing pattern, with two flight peaks in early spring and late … Read More

Nematode Identification With AI

Ernie NeffPests

Parasitic nematode damage in agriculture totals $125 billion around the world each year. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers hope to alleviate some of that destruction. The UF/IFAS scientists will use artificial intelligence (AI) to try to more rapidly identify nematodes. Some nematodes live in the ground and harm plants, while others are beneficial, so … Read More

Managing Lebbeck Mealybug

Ashley RobinsonPests

University of Florida Institute of Food and Agricultural Sciences entomologist Lauren Diepenbrock provided an update on lebbeck mealybug during the 2021 Florida Citrus Growers’ Institute. The pest, first found in Florida commercial citrus in 2019, feeds on and damages citrus, causing up to 70% fruit drop in heavily infested groves. According to Diepenbrock, damaged fruit will not be marketable for … Read More

Managing Citrus Root Pests

Ernie NeffPests

Diaprepes root wevil

Nematologist Larry Duncan discussed efforts to control the root pests sting nematode and Diaprepes root weevil in his presentation during the virtual April 6 Florida Citrus Growers’ Institute. Duncan works at the University of Florida Institute of Food and Agricultural Sciences’ (UF/IFAS) Citrus Research and Education Center. The sting nematode and Diaprepes are especially concerning in the age of HLB, … Read More

Panhandle Growers Experience Scales

Ernie NeffPests

Many citrus growers in Florida’s panhandle were experiencing high populations of scales early this year, particularly Florida red scale and false Florida red scale, Jefferson County Extension agent Danielle Sprague announced in a recent issue of the Cold Hardy Citrus Connection newsletter. The newsletter is a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Extension publication. Sprague pointed … Read More

New Pest Product Introduced

Ernie NeffIndustry News Release, Pests

Bayer has introduced Vynyty Citrus®, its latest biological and pheromone-based crop protection product to control pests on citrus farms. Vynyty Citrus®, a container with an active liquid inside, does not generate resistance or residues in harvests or in the environment, according to Bayer. It is the first such product on the market that is formulated with pheromones and natural pyrethrum … Read More

Time to Check Under the Hood for Nematodes

Tacy CalliesPests, Tip of the Week

By Larry Duncan Monitoring population levels of plant parasitic nematodes and phytophthora is best done in springtime prior to the rainy season. Peak population density of the citrus nematode (Tylenchulus semipentrans) occurs at that time, and the accuracy of sample results increases with population density. The sampled population levels of this nematode and those of Phytophthora spp. can be compared … Read More

Scout for Scale and Mealybug Crawlers

Tacy CalliesPests, Tip of the Week

By Lauren Diepenbrock While scale and mealybug pests commonly found in citrus have historically been controlled by predators and parasites, management advice for this group of insects is often requested. There are likely several underlying factors to these insects becoming more frequently encountered. This includes changes in insecticide management practices, changes in nutritional management, and increased scouting due to the … Read More

Predatory Mites in Citrus Under Protective Screen

Tacy CalliesPests

By Emilie Demard and Jawwad Qureshi Managing the Asian citrus psyllid (ACP), a vector of huanglongbing (HLB), is critical for reducing disease incidence and improving tree health. Growing citrus under screened structures, referred to as citrus under protective screen (CUPS), protects trees from ACP and HLB. CUPS provides an opportunity to produce premium-quality fresh fruit by preventing psyllids and HLB … Read More

California Growers Needed for Thrips Study

Len WilcoxCalifornia Corner, Pests

Researchers from the University of California’s Kearney Agricultural Research and Extension Center are asking for help from industry members as they investigate citrus thrips. Thrips are a serious headache for citrus growers. They cause issues in all varieties of citrus, particularly in the San Joaquin Valley. Additionally, the pest has been known to rapidly develop resistance to management materials. Growers … Read More

Thrips Management Tips

Tacy CalliesPests, Tip of the Week

As Florida growers prepare for the spring bloom, it is time to think about a pest that thrives on citrus flowers: thrips. Most notably, flower thrips are known to cause damage to developing flowers in sweet orange. Feeding damage can range from negligible to causing abortion of the flower or developing fruitlet. This pest is particularly challenging because it migrates … Read More

Fire Ant Management in Citrus

Tacy CalliesPests

By Lauren M. Diepenbrock While there are many species of ants in Florida, the invasive fire ant (Solenopsis invicta) is the one most people are familiar with. These ants can be pests in agriculture, landscapes and structures. The pest’s ability to use a variety of habitats and resources makes it challenging to manage. In citrus groves, fire ants can be … Read More

Plan Your Insect Management for 2021

Tacy CalliesPests, Tip of the Week

By L.M. Diepenbrock Insect and mite management is a year-round challenge in Florida citrus. With the warm climate, pests are at the ready as soon as plant resources are available to them. With knowledge of insect and mite biology in relation to tree phenology, plans can be developed to protect fruit and maintain productive citrus trees. Populations of many of … Read More

Control Methods for Major Pests of Cold-Hardy Citrus

Tacy CalliesPests

By Xavier Martini and Danielle Sprague Cold-hardy citrus, that is, citrus grown above the 30th parallel north, is a blooming industry. In less than 10 years, the acreage in North Florida has gone from almost nonexistent to approximately 1,000 acres. Growers in the region plan to plant more in the coming years. In Georgia, there are approximately 2,000 acres across … Read More

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 … Read More

Georgia Citrus Pest and Disease Update

Tacy CalliesDiseases, Georgia, Pests

As the Georgia citrus industry continues to grow and prosper, growers should be aware of the potential signs of citrus pests and diseases that could be looming in their groves. Bill Barber, Certified Crop Advisor and owner of Barber Ag Services, delivered a presentation during the 2021 virtual Southeast Regional Fruit and Vegetable Conference. He addressed pests and diseases presently … Read More

Growers’ Input on Pests Needed

Ernie NeffPests

long-horned beetle

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, … Read More

Texas Mexfly Quarantine Established

Ernie NeffPests

Effective Nov. 5, 2020, the Animal and Plant Health Inspection Service (APHIS) and the Texas Department of Agriculture (TDA) established a Mexican fruit fly quarantine in Lasara, Willacy County, Texas. The pest is commonly referred to as Mexfly. APHIS, part of the U.S. Department of Agriculture, is applying safeguarding measures and restrictions on the interstate movement or entry into foreign … Read More

Research Update on Individual Protective Covers

Tacy CalliesPests

By Fernando Alferez, Susmita Gaire, Ute Albrecht, Ozgur Batuman, Jawwad Qureshi and Mongi Zekri It has been nearly three years since the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) started its studies on individual protective covers (IPCs). The objective of this study is to evaluate the feasibility of IPCs as a strategy to prevent HLB infection of … Read More

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 … Read More