Mustafa O. Jibrin, PhD
Stillwater, OK
Joined September 2014
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The weather was just too favorable for Pecan scab this year. Powdery mildew may also be seen on scab lesions as secondary disease. Typically resistant varieties like Kanza were not left out. Trees with more fungicide sprays have less disease pressure but they were not spared too. – at Oklahoma, USA
Dr. Mustafa O. Jibrin retweeted
Editor’s Pick! Allison Coomber, @davorasmussen, and Jean Beagle Ristaino uncovered significant variation within the RXLR genome of isolates of the US-23 lineage of Phytophthora infestans collected from various tomato cultivars. Learn more: doi.org/10.1094/PHYTO-12-24-…
ALT Fig. 2. Comparison of the targeted genes, RXLR effectors, for the four Phytophthora infestans isolates used at the start of the experiment.
The pecan scab pathogen, Venturia effusa, is a very slow growing fungus and difficult to isolate. One of our major progress this year was establishing the right protocol for pathogen isolation, thanks to efforts by PhD student Usman Rabiu Bello. Part of #PlantHealth2025 poster.
ALT Venturia effusa on PDA after more than 1 month
Dr. Mustafa O. Jibrin retweeted
PSI upcoming Test dates available for Lawton. test-takers.psiexams.com/okp… #okstate #extension #pested
New publication on bacterial spot of tomato from the Lab highlights:
1. Rapid population changes in successive seasons
2. A new bacterial species which we have named Xanthomonas oklahomensis
3. Variable sensitivities to copper bactericide
apsjournals.apsnet.org/doi/1…
Dr. Mustafa O. Jibrin retweeted
TOMATO TUESDAY: Bacterial wilt of tomato caused by Ralstonia solanacearum. The disease is favored by hot temperatures & wet soils. The Bacterium clogs the vascular tissue causing wilt & death of plants. A cut stem shows a brown discoloration of the pith #Bacteria #Disease #APS
Many cucurbit (watermelon, pumpkin, summer squash, winter squash, cantaloupe, and most other melon) growers are reporting squash bugs at economical injury levels on their farms.
For more information on this problem and how to manage it, please see extension.okstate.edu/e-pest… – at Oklahoma, USA
ALT Adult squash bug on squash (Photo: M.O. Jibrin, OSU, 2025).
Memorable meeting in Hawaii. Great talks and connections for potential collaborations. #PlantHealth2025 – at Honolulu, HI
If you are in Hawaii, join us at our presentations. Many thanks to the all those who contributed to the presentations from our Lab. #PlantHealth2025 – at Oklahoma, USA
For the second year running, our Lab participated in the annual 4H Round Up. Our workshop focused on "Becoming a Plant Detective "...great presentations from all Lab members. – at Oklahoma, USA
PlantHealth2025#. Congratulations to PhD Student in the Lab, Usman Rabiu who got the E.S. Saari Student Travel Fund. He will be giving an oral presentation on his effector-informed drug discovery work and a poster presentation on pecan disease characterization.
First look: Thanks to Dr. Chen Jianchi (USDA, California) for the collaboration.
First report of Xylella fastidiosa subsp. multiplex associated with bacterial leaf scorch on American elderberry (Sambucus canadensis L.) in Oklahoma | Plant Disease apsjournals.apsnet.org/doi/1… – at Oklahoma, USA
Grateful to APS @PlantDiseaseJ for awarding me the 2025 Dr.
Lafayette Frederick Diversity in Mentoring Award. Last week, with support from the fund that comes with the award, we welcomed Daviona Jackson, recent Langston University graduate, as an intern in the Lab. – at Oklahoma, USA
An update on berry splitting in grape clusters observed in some vineyards recently.
extension.okstate.edu/e-pest…
Getting ready for the OPGA Annual Convention in Glenpool. "Three days of learning, networking and fun". Our Lab involvement: Introducing a "new" pecan problem, Progress on the Southern IPM Pecan PIPE website and statewide disease survey
Registration: okpecangrowers.com/annual-co… – at Oklahoma, USA
Next week on Advances in Phytobacteriology, @NWangUF will talk on "Citrus Huanglongbing is a Pathogen-Triggered Immune Disease and CRISPR Genome Editing in Improving Disease Resistance"
Register here: bit.ly/4jhM3cV – at Oklahoma, USA
Dr. Mustafa O. Jibrin retweeted
Editor’s Pick! Copper failing against bacterial spot in Florida tomatoes? Ketsira Pierre et al. show that two small molecules—piperidine and pyrrolidine—outperform or enhance standard treatments in lab, greenhouse, and field. 🍅 @JibrinLab Learn more: doi.org/10.1094/PDIS-04-24-0…
Plants take "drips" too: setting our fungicide tree injection trials for disease control. – at Oklahoma, USA
Last year, we began a statewide program to survey and characterize pecan diseases in Oklahoma. As part of his studies, Usman Rabiu Bello, led a Pecan South article to detail progress and expectations. To read more : pecansouthmagazine.com/magaz… (subscription required).
