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 …

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 …

Biological Controls for Lebbeck Mealybug

Tacy CalliesBiologicals

Lebbeck mealybug (Nipaecoccus viridis) was first identified in Florida citrus in 2019 in Highlands County. It has now been documented in commercial citrus groves in 11 counties and in dooryard citrus plantings in two counties. While lebbeck mealybug can feed on most of the above-ground parts of a citrus tree, it is most damaging in the canopy, where it feeds …

Lemon Price Crisis in Spain

Tacy CalliesInternational, lemons

By Francisco Seva Rivadulla The Spanish lemon sector is going through one of the worst price crises in recent years. Currently, prices at origin for Fino lemons are 0.15 to 0.18 euro cents per kilo, while the production cost is 0.20 per kilo. Therefore, Spanish producers are losing money this harvest season, according to sources from the Agricultural Association of …

psyllids

Citrus Phenology-Based Spraying for Psyllids

Ashley RobinsonPsyllids

By targeting Asian citrus psyllids on an area-wide scale and focusing on several individual properties simultaneously, growers can minimize psyllid movement between groves, reduce HLB transmission and maintain citrus production at a profitable level. Generally, most psyllid sprays are applied on a calendar or threshold basis, resulting in high-spray frequencies and associated costs. Because of the Asian citrus psyllid’s high …

Irrigation and Nutrition Management in the Era of HLB

Ashley RobinsonIrrigation, Nutrition

A solid nutrition and irrigation program can enhance the productivity of HLB-affected trees and improve citrus tree health, potentially making production profitable even under HLB conditions. This was the subject of Davie Kadyampakeni’s talk during a March 9 OJ Break virtual meeting held for citrus growers. Kadyampakeni is a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant …

Conservation Program Improvements

Ernie NeffEnvironment

The application deadline for the U.S. Department of Agriculture’s (USDA) Conservation Stewardship Program (CSP) is March 26 for fiscal year 2021.   Through CSP, USDA’s Natural Resources Conservation Service (NRCS) helps agricultural producers and forest landowners earn payments for expanding conservation activities while maintaining agricultural production on their land. CSP also encourages adoption of new technologies and management techniques. Changes …

Canopy Management to Improve Fresh Fruit

Ernie NeffPruning

A new University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) document, Management of Citrus Tree Canopies for Fresh-Fruit Production, addresses the principles of citrus pruning and canopy management. It tells how applying those principles can improve the quality and quantity of fresh fruit production in Florida. Here is an excerpt from the document: “Canopy management has three goals …

Changes to U.S. Orange Crop Forecast

Ernie NeffCrop Forecast

Florida’s orange crop forecast was reduced by 500,000 boxes to 55.5 million boxes in the U.S. Department of Agriculture’s (USDA) March 9 citrus crop forecast. This represents a 1% reduction from the February forecast. If the March projection is realized, it will be 18% lower than last season’s final production. Florida’s Valencia orange crop forecast was reduced by 1 million …

citrus

Disaster Assistance Programs for Citrus

Ernie Neffcrop insurance

Two disaster assistance programs available to citrus growers were discussed during the virtual 2021 Louisiana State University AgCenter Citrus Symposium. The Noninsured Crop Disaster Assistance Program (NAP) and the Tree Assistance Program (TAP) are both offered by the U.S. Department of Agriculture’s Farm Services Agency (USDA-FSA). Jamie Rodreguez, a USDA-FSA county executive director in Louisiana, made the presentation. Rodreguez said …

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 …

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 …

Could Finger Limes Be Florida’s Hero?

Ashley RobinsonAll In For Citrus Podcast, Limes, Research

The Australian finger lime, a citrus relative, could be a new specialty crop for Florida citrus growers. Traditionally, finger limes have remained rare in the United States, grown few and far between. However, the fruit’s unique tolerance to HLB is becoming increasingly attractive to Florida growers. Manjul Dutt, research assistant scientist at the  University of Florida Institute of Food and …

Florida Growers Wanted for Rootstock Trials

Ernie NeffResearch, Rootstocks

The Citrus Research and Development Foundation (CRDF) is establishing a new project to evaluate the most promising citrus rootstocks in grower field trials. The rootstock trials are projected to be planted in the spring or summer of 2022. The goal will be to identify plant material with the traits needed for growers to realize the highest possible pound solids per …

Imports Threaten EU Citrus Industry

Tacy CalliesInternational

By Francisco Seva Rivadulla Citrus imports in the European Union (EU) are causing a large oversupply in the market. According to the Valencian Association of Farmers, the largest organization of agricultural producers in Spain, a new record of 2,198,146 tons of citrus were exported to the EU from January to October 2020. This represents an increase of 15.4% over the …

New Research on HLB-Associated Fruit Drop

Ashley RobinsonFruit Drop

Tripti Vashisth revealed new research information on what causes preharvest fruit drop and possible strategies to mitigate the problem. The Florida citrus industry, stricken by HLB, has suffered a sharp increase in preharvest fruit drop, leading to a substantial reduction in citrus production. According to Vashisth, assistant professor of horticulture at the University of Florida Institute of Food and Agricultural …

project

Florida Citrus Industry Continues Decline

Tacy CalliesCitrus Greening

Florida citrus production has decreased for almost two decades. According to Marisa Zansler, director of economic and market research at the Florida Department of Citrus, the two main factors for the state’s steady decline are citrus greening (huanglongbing, known as HLB) and Hurricane Irma. Zansler presented staggering statistics during the Florida Agricultural Policy Outlook Conference on Feb. 26 that showed …

Prepare for Citrus Canker Season

Tacy CalliesDiseases, Tip of the Week

By Evan Johnson Now that bloom has arrived, it is time to start thinking about canker management. As the fruitlets develop, they will become susceptible around the end of March to the beginning of April. The spring fruit lesions are particularly concerning because they cause fruit drop. Without proper management, early season canker can cause 90 to 100% crop loss …

Making Sense of Biologicals: Benefits of Biostimulants

Tacy CalliesBiostimulants, MSOB

Fertilizers help crops reach maximum yields while fungicides prevent diseases. But what if there were products available that could further enhance the fruiting qualities all growers hope to achieve every season? IMPROVED FRUIT PRODUCTIONIf growers can increase the level of flowering hormones in their crops, this will allow for a better fertilization process that will generate improved fruit set and …

Biological Control of the Asian Citrus Psyllid

Tacy CalliesBiologicals

By Jawwad Qureshi Managing the Asian citrus psyllid (ACP) is critical because of its role in spreading huanglongbing (HLB). Biological control is one method for ACP control. It is essential for developing integrated and sustainable pest management strategies. Biological control has always been a vital component of citrus pest management in Florida; understanding its contribution to the mortality of ACP …