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

Bean plants

May 4, 2023

Identifying and Characterizing Bacterial Isolates from the Stratosphere

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

Cercospora leaf spot

March 29, 2023

A Plant Disease Changes Sugarbeet Production in Nebraska

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

Cercospora

July 29, 2022

Cercospora Leaf Spot Detected in Sugarbeets

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

Microscopic fungal pathogens

December 13, 2021

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

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

Ranger alfalfa plants

May 11, 2021

Additional Gram-positive Bacterial Diseases in Nebraska Crop Production

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

Sugar beets with root disease

March 10, 2021

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

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

Diseased chickpea plant

January 29, 2021

New Chickpea Disease Study Will Begin in 2021

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

Lesions on sugar beet leaves.

July 22, 2020

Cercospora Leaf Spot Detected in the Panhandle

By Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center, Xin Qiao - Irrigation and Water Management Specialist

Young lesion of Cercospora leaf spot on sugar beet leaf

March 19, 2020

Specialty Crops Disease Update - 2019

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

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

October 24, 2019

Puzzling Out Two Closely Related Corn, Dry Bean Diseases

By Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center, Tamra Jackson-Ziems - Extension Plant Pathologist

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.

July 15, 2019

Cercospora Leaf Spot Spotted in the Panhandle – Be Aware!

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

Goss's Wilt of corn

January 23, 2019

Nebraska Plant Pathology: A Culture of New Diseases

By Kyle Broderick - Extension Educator and Coordinator of the UNL Plant and Pest Diagnostic Clinic, Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center, Tamra Jackson-Ziems - Extension Plant Pathologist, Stephen Wegulo - Extension Plant Pathologist

cropwatch graphic

January 10, 2019

Specialty Crops Disease Update

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

Cowpea wilt

October 9, 2018

Cowpea Bacterial Wilt ― An Old Disease in a New Crop

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

Sunflower Rust

May 24, 2018

Sunflower Rust May be Problematic in 2018 — Be Aware!

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

Dry rot canker in sugarbeet

May 23, 2018

Dry Rot Canker – Obscure, but Returning Rhizoctonia Disease

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

A typical wheat field in Nebraska early in the growing season.

April 19, 2018

It's Time to Scout for Wheat Diseases

By Stephen Wegulo - Extension Plant Pathologist, Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center

Violet root rot, a rhizoctonia crocorum fungus, in soil

April 12, 2018

The First Identified Root Pathogen: Rhizoctonia

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

Figure 1. Complete and permanent collapse of sugarbeet petioles and leaves caused by Rhizoctonia Root and Crown Rot.

February 16, 2018

Exploring the Rhizoctonia Pathogens of Sugarbeet

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

cropwatch graphic

January 8, 2018

Fungicides are for Fungi

By Loren Giesler - Extension Plant Pathologist, Bob Harveson - Extension Plant Pathologist, Panhandle Research and Extension Center, Tamra Jackson-Ziems - Extension Plant Pathologist, Stephen Wegulo - Extension Plant Pathologist