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Below you'll find a list of all posts that have been categorized as “Psyllids”
Citrus Research and Development Foundation (CRDF) Chief Operations Officer Harold Browning reports on the conclusion of the five-year NuPsyllid project aimed at developing a psyllid that won’t spread HLB. “The NuPsyllid project was a project funded through the USDA competitive grant program and was established in 2012 to develop a psyllid that would not be capable of transmitting the (HLB-causing) …
By Phil Stansly Impact on Asian citrus psyllid (ACP) populations: Psyllids that survived the storm will find plenty of food thanks to a huge flush that is following defoliation from the hurricane. This and almost ideal temperature conditions will spawn an explosion of ACP, starting with the first post-Irma generation less than three weeks after the storm. By five weeks and …
In a Citrus Expo talk, University of Florida Institute of Food and Agricultural Sciences entomologist Phil Stansly focused on the importance of continuing to spray psyllids in groves already infected with HLB. The main reason to do that, he says, is to keep psyllids from re-inoculating trees with HLB by “pumping more and more bacteria into that tree.” He …
By Nabil Killiny and Steve Futch Citrus growers frequently inquire if Florida temperatures in the summer or winter are sufficiently high or low enough to control or suppress the Asian citrus psyllid (ACP). This question is the subject of this short article. The reason growers pose the question about how temperature impacts psyllids is because ACP is a phloem feeder …
At a recent meeting of the Citrus Research and Development Foundation’s (CRDF) Commercial Product Delivery Committee, approximately half of the agenda was devoted to bactericides and HLB-spreading psyllids. Reflective mulch that keeps psyllids away and field trials for HLB-resistant or tolerant rootstocks and scions were also addressed. CRDF Chief Operations Officer Harold Browning summarizes some of the discussions. “The issue …
Lee Jones was in the Citrus Expo seminar audience recently when a scientist reported there have been incidences of HLB-spreading psyllids being resistant to insecticides. Jones, general manager of Gardinier Florida Citrus, has one recommendation for dealing with the issue, at least partially. “I would really suggest that October to March window as an application window for the imidacloprids (a …
Ears perked up in the Citrus Expo seminar hall last week when Lukasz Stelinski reported incidences of Asian citrus pysllid resistance to insecticides, “particularly the neonicotinoid group of insecticides in Florida.” The neonicotinoids have been a key weapon against the psyllids that have spread HLB to groves statewide. Stelinski, an entomologist with the University of Florida’s Institute of Food and …
The California Citrus Research Board (CRB) hosted live Asian citrus psyllid (ACP) fogging demonstrations in April. The purpose was to show the viability of controlling the spread of ACP by fogging shipments of citrus on the truck, as close to the harvested field as possible. Spencer Walse, CRB research scientist specializing in chemical applications in agriculture, carried out the demonstrations. He is based at …
The origin of HLB-spreading Asian citrus psyllids found in citrus groves is regarded differently in Texas and California than it is in Florida. Michael Rogers, University of Florida Institute of Food and Agricultural Sciences entomologist and director of the Citrus Research and Education Center, explains. “Areas like Texas and California, their focus has been on combating psyllids in the urban …
Kirsten Pelz-Stelinski, a University of Florida/Institute of Food and Agricultural Sciences entomologist, reports on the psyllid control methods that produce the best and worst results: “We looked at abandoned (groves); intermittently managed (groves), which we considered to be five or fewer insecticide sprays per year; we looked at organically managed groves; and we looked at what we called conventionally managed …
The value of bactericides and Asian citrus psyllid control were some of the major issues that growers discussed at a forum in Sebring on May 11. Laurie Hurner, Highlands County Extension director and citrus agent, summarizes the discussions. Hurner reports that one grower will say the bactericides seem to be working against HLB, while another says they see no tree …
Michael Rogers with the University of Florida’s Institute of Food and Agricultural Sciences (UF/IFAS) says growers frequently ask him two questions. One is whether they need to continue to control HLB-spreading Asian citrus psyllids even though HLB is widespread in Florida. The other is about the best time to spray for psyllids. Rogers, an entomologist and director of the UF/IFAS …
Growers shared their frustrations and experiences with HLB at a May 4 grower roundtable meeting in Wauchula. Event co-host Steve Smith, executive director of Peace River Valley Citrus Growers Association, summarizes the discussions. “A lot of the growers were talking about fertigation and how much, and what’s working for them on the short-term basis as far as tree health goes,” …
Populations of HLB-spreading psyllids in groves can be impacted by windbreaks, grove orientation and whether new plantings are resets or solid settings. So says Kirsten Pelz-Stelinski, an entomologist with the University of Florida’s Institute of Food and Agricultural Sciences. “Windbreaks are one of the best things that you can do in terms of protecting the grove,” Pelz-Stelinski says. She says …
Approximately 200 Florida citrus industry members attended the HLB Grower Day on April 21 at the Citrus Research and Education Center (CREC) in Lake Alfred. Speakers summarized scientific presentations made at a recent international HLB research conference. Michael Rogers, an entomologist and director of the University of Florida/Institute of Food and Agricultural Sciences CREC, discussed control of the Asian citrus …
The natural enemies Diaphorencyrtus aligarhensis and Tamarixia radiata may have a future together in California. By Ivan Milosavljević and Mark S. Hoddle Over the past 11 years, the Asian citrus psyllid (ACP)-Candidatus Liberibacter asiaticus (CLas) (manifested as citrus greening) complex has become a “duo from hell” for Florida’s citrus industry, causing a substantial negative economic effect. ACP-CLAS MANAGEMENT IN CALIFORNIA …
Huanglongbing (HLB) was confirmed in a single citrus tree in the city of La Habra in Orange County, California, on April 11, 2017. This new find will result in a new HLB quarantine area, which will link the existing quarantines into a contiguous zone spanning portions of Los Angeles and Orange counties. Additionally, two samples of Asian citrus psyllids (ACP) …
University of Florida entomologist Kirsten Pelz-Stelinski presented an abundance of facts about Asian citrus psyllids at the recent Florida Citrus Growers’ Institute in Avon Park. Her presentation included a discussion on how far the HLB-spreading psyllids can travel and where they are predominantly found in citrus trees. “They’re quite capable of long-distance movement, about four miles we determined,” Pelz-Stelinski says. …
