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

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.

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

Panhandle Perspectives: 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. 

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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.

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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.

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Sample crop production budget for corn

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.

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A comparison of the bacteria that cause bacterial wilt of dry beans and Goss’ wilt of corn. The rods of Curtobacterium (left) in the dry bean wilt pathogen are shorter and fatter than the Goss’ wilt pathogen, Clavibacter (right).
Figure 1. A comparison of the bacteria that cause bacterial wilt of dry beans and Goss’ wilt of corn. The rods of Curtobacterium (left) in the dry bean wilt pathogen are shorter and fatter than the Goss’ wilt pathogen, Clavibacter (right).

Puzzling Out Two Closely Related Corn, Dry Bean Diseases

October 24, 2019
Two closely related plant diseases — one in corn and the other in dry bean — have followed similar, but somewhat perplexing patterns of appearing, disappearing, and then resurging as a serious threat to crop yield. A UNL researcher looks at factors affecting the cycle and whether it can be predicted.

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Bob Harveson
Bob Harveson

Harveson Receives APS Distinguished Service Award for Region

August 28, 2019
The Distinguished Service Award recognizes outstanding effort in teaching, control of a significant plant disease, or service to the science of plant pathology. In nominating Harveson, his peers touted his work across multiple areas.

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Sugar beet leaf with 3 very young, circular lesions induced by the CLS  pathogen, Cercospora betae.   If conditions are conducive, the disease can spread rapidly, even from this  small beginning.
Figure 1. Sugar beet leaf with three very young, circular lesions induced by the cercospora leaf spot pathogen, Cercospora betae. If conditions are conducive, the disease can spread rapidly, even from this small beginning.

Cercospora Leaf Spot Spotted in the Panhandle – Be Aware!

July 15, 2019
On July 15 symptoms characteristic of cercospora leaf spot were observed on the lower leaves of sugar beets at the university’s Panhandle Research and Extension Center in Scottsbluff. While it is unusually early for this disease, growers are urged to scout their fields as fungicide applications may be necessary.

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