Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center

Bob Harveson

faculty

Courtesy Professor Panhandle Research & Extension Center University of Nebraska–Lincoln
Professor Plant Pathology University of Nebraska–Lincoln

Work

4502 Ave I Scottsbluff NE 69361-4939

Work 308-632-1239

rharveson2@unl.edu

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Faculty Bio
Harveson Receives APS Distinguished Service Award from North Central Region
UNL Plant Pathologist's Book Offers Tales of Scientific Discovery

Cercospora Leaf Spot Detected in Sugarbeets

July 29, 2022

Periods of high humidity or extended leaf wetness and warm temperatures create the optimal conditions for cercospora leaf spot to develop.

Microscopic fungal pathogens — 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.

Soil Disease Index, Tool for Managing Sugarbeet Diseases, Available for Growers

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.

Additional Gram-positive Bacterial Diseases in Nebraska Crop Production

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.

Sugar beets with root disease — These sugarbeets demonstrate symptoms of a root disease characteristic of the wet-rot disease.

Sugarbeets: Source of the First Gram-Positive Bacterial Disease in Nebraska

March 10, 2021

Nebraska Extension Plant Pathologist Bob Harveson discusses the origins and impact of Gram-positive bacterial pathogens to Nebraska agriculture.

Diseased chickpea plant — A close-up view of Ascochyta blight in chickpea, showing symptoms on pods and dead leaves.

New Chickpea Disease Study Will Begin in 2021

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.

Lesions on sugar beet leaves. — Young lesions of the pathogen forming on sugar beet leaves.

Cercospora Leaf Spot Detected in the Panhandle

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.

Young lesion of Cercospora leaf spot on sugar beet leaf

Specialty Crops Disease Update - 2019

March 19, 2020

The incidence and distribution of crop diseases in western Nebraska have long been known to be influenced based on environmental conditions experienced during that particular year.

Why Should You Prepare and Use Crop Budgets?

December 4, 2019

The 2020 Crop Production Budgets for Nebraska are now available. They include 80 budgets for 15 crops, available in both PDF and customizable Excel formats.