Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center
Bean plants in the bacterial isolate research study.
May 4, 2023
Panhandle researchers were recently awarded USDA specialty crop block grants to study new copper alternative chemical products on fungal and bacterial diseases of dry beans, cowpeas, chickpeas and dry peas.
March 29, 2023
A review of the impacts cercospora leaf spot has had on sugarbeet production in Nebraska since the early 1900s.
Cercospora on a sugarbeet plant.
July 29, 2022
Periods of high humidity or extended leaf wetness and warm temperatures create the optimal conditions for cercospora leaf spot to develop.
This photo illustrates growth differences of two fungal pathogens and how they are identified from the Disease Index. Characteristic hyphal growth in culture of Aphanymyces cochliodes (right) and Rhizoctonia solani (left) emerging from infected seedlings plated at the same time in the plant pathology lab.
December 13, 2021
Since 2003, the UNL Panhandle Research and Extension Center has offered a pre-plant soil test to producers who need to identify soilborne sugarbeet pathogens in fields that will be planted to sugarbeets.
May 11, 2021
A review of two lesser-known diseases caused by Gram-positive bacterial pathogens that have been observed in Nebraska — bacterial wilt of alfalfa and bacterial mosaic of wheat.
These sugarbeets demonstrate symptoms of a root disease characteristic of the wet-rot disease.
March 10, 2021
Nebraska Extension Plant Pathologist Bob Harveson discusses the origins and impact of Gram-positive bacterial pathogens to Nebraska agriculture.
A close-up view of Ascochyta blight in chickpea, showing symptoms on pods and dead leaves.
January 29, 2021
With chickpea demand on the rise, UNL researchers are digging into a fungal disease issue that has long-prevented the crop's commercial growth in Nebraska.
Young lesions of the pathogen forming on sugar beet leaves.
July 22, 2020
On July 13, symptoms characteristic of Cercospora leaf spot (CLS) were found on lower leaves of sugarbeets from research plots at the Panhandle Research and Extension Center at Scottsbluff.