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Below you'll see everything we could locate for your search of “phytophthora”
By Chris Oswalt During this time of the year, Florida growers should be aware of the potential for the development of citrus brown rot disease. It can infect fruit at color break. If severe, the disease can cause a significant amount of infected fruit to drop. For this reason, groves with a history of brown rot in areas that recently …
Phytophthora incidences are increasing in Florida citrus groves, plant pathologist Ozgur Batuman reported during a May 21 presentation. Phytophthora diseases include foot rot of trunk and limbs, root rot and brown rot. Batuman, a University of Florida Institute of Food and Agricultural Sciences associate professor, said these diseases led to yield reductions of 3% to 6% per year even prior …
While the recent Florida Citrus Growers’ Institute presentations focused mainly on HLB, other topics were addressed, including phytophthora root rot. This disease has become more problematic in recent years. Megan Dewdney, University of Florida Institute of Food and Agricultural Sciences associate professor of plant pathology, spoke on the topic. She noted that phytophthora already is a complex problem and that …
Greg Douhan with University of California Agriculture and Natural Resources (UCANR) recently wrote about phytophthora diseases in California citrus. Edited excerpts follow: There are at least four species of Phytophthora species (P. citrophthora, P. parasitica, P. syringae and P. hibernalis) associated with citrus in California. The three diseases in citrus caused by these fungal-like pathogens are phytophthora root rot, phytophthora …
Plant pathologist Megan Dewdney put emphasis on new plantings during a mid-March discussion of phytophthora management for citrus trees infected with HLB. Dewdney is a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor at the Citrus Research and Education Center, where she spoke. Dewdney’s presentation was part of an OJ break hosted by UF/IFAS Extension multi-county …
By Megan Dewdney For foliar diseases, 2022 started off easily with limited outbreaks in Florida because the spring was dryer than average. The same La Niña weather pattern responsible for the dry conditions of the last two springs is predicted to occur again this winter into early spring. The weather pattern is then predicted to become a neutral pattern with …
By Megan Dewdney A priority for the Florida citrus industry is evaluating groves for damage and determining the best course of action going forward after the destruction of Hurricane Ian. One of the many considerations is the effect of flooding on root health, particularly if standing water has remained longer than 72 hours. The main diseases are phytophthora foot, crown …
The pathogen phytophthora has long presented problems for Florida citrus growers. But the HLB disease that has plagued Florida since 2005 reduces the efficacy of phytophthora management, citrus pathologist Ozgur Batuman reported in a recent virtual seminar. Batuman, who works for the University of Florida Institute of Food and Agricultural Sciences, said improved fungicide timing, number of applications and rates …
Phytophthora infection can lead to severe stunting in newly planted citrus trees, researcher Megan Dewdney told growers and others at a Jan. 19 presentation at the Citrus Research and Education Center in Lake Alfred, Florida. She said stunted trees never thrive or produce adequate fruit. Dewdney is a University of Florida Institute of Food and Agricultural Sciences plant pathologist. She …
A saturated summer across the Southeast means more potential for development of phytophthora root rot disease in citrus trees. The impact on Georgia’s young trees could be devastating, says Jonathan Oliver, University of Georgia assistant professor and small fruits pathologist. Oliver implores Georgia’s citrus producers to stay vigilant with their fungicide sprays, as the wet conditions have not let up. …
By Evan G. Johnson It is time to start thinking about protecting the fall root flush that will start soon and continue through November/December. This is the largest root flush of the year that stores carbohydrate reserves for next spring. Coming out of the rainy season, phytophthora has had the chance to build up plenty of inoculum, especially in groves …
By Evan Johnson The Florida citrus spring leaf flush is hardening off, which means the first root flush of the year is beginning. With the spring root flush comes thoughts of phytophthora foot rot. Spring roots are at particular risk in groves that had high phytophthora pressure last fall because many of the resting spores will start activating with the …
Citrus growers need every available tool to fight disease, reduce tree stress and keep groves healthy against Phytophthora root rot. According to the University of Florida Institute for Food and Agricultural Sciences (IFAS), Phytophthora root rot is one of the most important diseases threatening citrus yield. This disease can be caused by different species within the genus Phytophthora, a water mold in the …
By Evan G. Johnson As September winds down, the fall root flush is starting and will continue through November/December. This is the largest root flush of the year that stores carbohydrate reserves for next spring. Coming out of the rainy season, phytophthora has had the chance to build up plenty of inoculum, especially in groves with a history of root …
One of the most damaging pathogens for citrus crops continues to be Phytophthora, a soilborne pathogen that attacks the root systems and affects the entire citrus tree. As the pathogen degrades the tree’s root system, above ground symptoms such as slowed growth, chlorotic foliage and reduced fruit size intensify. Eventually, this may result in the death of the tree. Phytophthora can appear …
One of the most damaging pathogens for citrus crops continues to be Phytophthora, a soilborne pathogen that attacks the root systems and affects the entire citrus tree. As the pathogen degrades the tree’s root system, above ground symptoms such as slowed growth, chlorotic foliage and reduced fruit size intensify. Eventually, this may result in the death of the tree. Phytophthora can appear …
One of the most damaging pathogens for citrus crops continues to be Phytophthora, a soilborne pathogen that attacks the root systems and affects the entire citrus tree. As the pathogen degrades the tree’s root system, above ground symptoms such as slowed growth, chlorotic foliage and reduced fruit size intensify. Eventually, this may result in the death of the tree. Phytophthora can appear …
By Evan Johnson Diseases caused by phytophthora continually threaten Florida citrus production. Brown rot can directly reduce yields of early maturing varieties including Hamlin and grapefruit, can delay harvest of fresh market fruit until infected fruit have dropped, or risk packinghouse rejection of the load because it can spread post-harvest. Foot and crown rot can kill trees but are uncommon …
Phytophthora, citrus black spot and HLB are among diseases that could be spread in Florida groves as a direct or indirect result of Hurricane Milton, researcher Megan Dewdney cautioned. Dewdney, a University of Florida Institute of Food and Agricultural Sciences associate professor of plant pathology, offered suggestions for dealing with those diseases during a recent hurricane recovery webinar. PHYTOPHTHORA Phytophthora …
By Megan Dewdney It is late summer or early fall, and the usual time to consider brown rot treatment options has passed. However, you smell a sharp fermented fruit odor. When you look closer, fruit have the telltale soft brown lesions of brown rot. What options exist to minimize losses now? It is too late for the traditional control options …
