georgia

‘The Psyllids Will Like Georgia Just Fine’

Daniel Cooper Georgia, Psyllids

A California citrus leader believes Georgia will make an ideal home for the Asian citrus psyllid, which vectors the devastating huanglongbing (HLB) disease. “North of Florida, it is colder, and it’s certainly not as suitable a place as Florida is, but the psyllid is still going to be fine. The cold isn’t long enough here to knock the populations out,” …

mexican

Mexican Organic Orchards Offer Better Psyllid Control

Daniel Cooper HLB Management, Mexico, Organic

A wider diversity of weeds and insects in organic Mexican citrus orchards compared to conventional orchards aids in control of the HLB-spreading Asian citrus psyllid (ACP/Diaphorina citri), a Mexican scientist reported recently. HLB is also known as citrus greening disease.  “In the organic orchard, there are almost double the species of weeds compared to the conventional orchard,” Carlos Castillejos Cruz …

tool

New Tool Will Help Brazilian Growers Manage Psyllids

Daniel Cooper Brazil, HLB Management, Psyllids

Fundecitrus has launched Evaluate Psyllid, a tool that will help citrus growers choose insecticides to manage the pest that spreads citrus greening disease. Evaluate Psyllid will make available the results of insecticide efficacy experiments on field psyllid populations in different regions of Brazil’s citrus belt. The insecticide efficacy data will be constantly updated as experiments are carried out. It will …

Pheromone

Pheromone-Based Psyllid Control Not Viable

Daniel Cooper Brazil, Psyllids, Research

Studies with psyllid pheromones show that the insect’s behavior is altered when it is infected by the HLB-causing bacterium Candidatus Liberibacter (CLas). This makes it difficult to produce a commercial psyllid-control product based on the insect pheromone, Brazil’s Fundecitrus has concluded. “The sexual pheromone is an attractant produced by the female of the species, which promotes behavioral changes in male …

psyllids

New Discovery About Asian Citrus Psyllids

Daniel Cooper HLB Management, Psyllids, Research

A failed field test has led to a major discovery about Asian citrus psyllids (ACP). According to new research, the bacterium that causes HLB disease can interfere with ACP’s sense of smell, rendering some kinds of insect traps useless. The work is currently available as a preprint. HLB, also known as citrus greening, is caused by the Candidatus Liberibacter asiaticus (CLas) bacterium. …

Mulch Suppresses Psyllids in Young Trees 

Tacy Callies Psyllids, Tip of the Week

By Jawwad A. Qureshi, Lauren Diepenbrock and Davie Kadyampakeni  Protecting citrus trees from the Asian citrus psyllid (ACP) is critical to reducing the spread and severity of huanglongbing (HLB) disease. The frequent availability of viable shoots in young trees is attractive to psyllid colonization, feeding and oviposition events. UV-metalized reflective mulches reflect ultraviolet light, which is disturbing for some insects …

Bud Advisories Help Growers Time Psyllid Sprays

Tacy Callies Industry News Release

The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) is reminding citrus growers that flower bud advisories are now being issued. The UF/IFAS advisories can help growers determine when to spray for HLB-spreading Asian citrus psyllids and when to stop spraying in an effort to protect pollinating bees. Tripti Vashisth, a UF/IFAS associate professor of horticultural sciences, will …

New Research on Neonicotinoids for Psyllids

Tacy Callies Brazil, Psyllids, Research

Continuing Brazilian research into the application of neonicotinoids via drench for control of HLB-spreading psyllids shows higher efficacy than earlier results indicated. In September, Fundecitrus released preliminary results on the application of neonicotinoids via drench. At that time, tests carried out on a property in Casa Branca, São Paulo, showed that the efficiency of the molecules for this type of …

control

Combination of Essential Oils and Kaolin to Control Psyllids

Daniel Cooper HLB Management, Tip of the Week

By Xavier Martini and Romain Exilien  Despite intensive control efforts, the Asian citrus psyllid (ACP), the vector of Candidatus Liberibacter asiaticus, the bacteria causing citrus greening, remains the most devastating pest of citrus. The ACP typically relies on tactile, visual and odor cues to detect its host. By combining an irritant, a visual masking and a true repellent, University of Florida …

fruit fly

Updates on Medfly and Psyllid Quarantines in California

Josh McGill California Corner, Pests, Regulation

Agriculture officials recently established a Mediterranean fruit fly (Ceratitis capitata or Medfly) quarantine and expanded an Asian citrus psyllid (ACP) quarantine, both in California. MEDFLYFederal and state agriculture officials on Oct. 18 established the Medfly quarantine in California’s Los Angeles County. The action was taken by the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (USDA APHIS) and …

acp

Conclusions on Asian Citrus Psyllid Control

Josh McGill HLB Management, Pests

HLB, spread by the Asian citrus psyllid (ACP), has been the scariest and most destructive disease that Florida citrus growers have ever faced. So, it was fitting that entomologist Jawwad Qureshi made a virtual presentation about ACP/HLB on Halloween, often considered the scariest day of the year. Qureshi, a University of Florida Institute of Food and Agricultural Sciences associate professor, …

Fundecitrus Addresses Issues With Psyllid Insecticides

Josh McGill Brazil, HLB Management, Pesticides

The resistance of HLB-spreading psyllids to some insecticides and the low effectiveness of insecticides applied via drench to control psyllids were recently addressed by Fundecitrus researchers. RESISTANCE OF PSYLLIDS Fundecitrus professionals participated in a meeting of the Brazilian Insecticide Resistance Action Committee. They were researcher Marcelo Miranda and agricultural engineer and postdoctoral fellow at Luiz de Queiroz College of Agriculture/University of …

First CLas-Positive Psyllids Found in Ventura County

Josh McGill California Corner, HLB Management, Psyllids

A Candidatus Liberibacter asiaticus (CLas)-positive Asian citrus psyllid (ACP) sample has been collected from a residential property in California’s Ventura County. CLas is the bacterium that causes HLB. The Citrus Research Board’s Jerry Dimitman Laboratory confirmed the positive sample. This is the first confirmed CLas-positive ACP sample found in Ventura County. The positive sample, comprised of 12 adult psyllids from …

Psyllid Resistance to Organophosphates Begins in Brazil

Josh McGill HLB Management, Pesticides, Psyllids

Research has confirmed the initial phase of resistance of the HLB-spreading psyllid to the active ingredient malathion in some microregions of the citrus belt of São Paulo and Triângulo/Southwest Mineiro. Malathion is from the organophosphate chemical group. The research was conducted by Fundecitrus in partnership with Luiz de Queiroz College of Agriculture/University of São Paulo (Esalq/USP). This is the third …

Brazil Breaks Psyllid Record Again

Josh McGill Brazil, HLB Management, Psyllids

The Brazilian citrus belt of São Paulo and Triângulo/Sudoeste Mineiro has recorded yet another record high in the average number of greening-spreading Asian citrus psyllids captured by traps. In the second half of August, there was an average growth of 147% in the average catch compared to the previous two-week period. The average jumped from 3.4 to 8.4 insects per …

hlb

Replacing Psyllid Host Plants

Josh McGill Brazil, HLB Management, Psyllids

The secretary of agriculture and supply of the state of São Paulo, Brazil, in partnership with Fundecitrus, has launched a campaign to replace plants that are hosts for the HLB-spreading psyllid. HLB disease is also known as citrus greening. The campaign, called Plant This Idea, aims to replace citrus and myrtle plants with fruitful and ornamental plants in rural backyards …

Brazilian Psyllid Increase Poses Extreme Risk

Josh McGill Brazil, HLB Management, Psyllids

Brazil’s primary citrus region recorded a significant increase in the average number of HLB-spreading psyllids captured in the first half of August compared to the previous fortnight and the same period of 2022. In the citrus belt of São Paulo and Triângulo/Sudoeste Mineiro, there was an average growth of 80.4% in the capture of psyllids in the last fortnight compared …

tool

Psyllids Reach Historically High Levels in Brazil

Josh McGill Brazil, HLB Management, Psyllids

Populations of Asian citrus psyllids in the Brazilian states of São Paulo and Minas Gerais have hit historically high levels, Fundecitrus recently reported. Fundecitrus described the development as “alarming” because the psyllids spread citrus greening disease.  Reversing the situation requires immediate and joint action among citrus growers in the same micro-region, Fundecitrus stated. It reported that in the first half …

Fundecitrus App Aids Psyllid Insecticide Rotation

Josh McGill Brazil, HLB Management, Technology

The Fundecitrus app, launched in February, has a new feature to help citrus growers properly rotate insecticides to manage the psyllid that spreads citrus greening disease. The new feature helps growers choose insecticides with different modes of action. The use of insecticides with the same mode of action in sequential applications can result in an increase in the frequency of …

Drone Sprays for Psyllids Effective in Brazil

Josh McGill HLB Management, Psyllids, Technology

Using drones to apply chemical control for HLB-spreading psyllids in Brazil proved effective against adult insects, a Fundecitrus researcher reported. The researcher, Marcelo Miranda, said psyllid mortality was above 80% as a result of drone applications. Miranda’s work was pioneering in 2021. There was no record of the use of drones for the chemical control of the psyllid in western …