Sugarbeet Disease

A Plant Disease Changes Sugarbeet Production in Nebraska

March 29, 2023

A review of the impacts cercospora leaf spot has had on sugarbeet production in Nebraska since the early 1900s.

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.

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.

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.

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.

Dry rot canker in sugarbeet — Figure 1. Surface tissues of the dry rot canker rhizoctonia disease first identified in sugarbeet in 1920 are marked by a distinctive series of concentric circles. (Photos by Bob Harveson)

Dry Rot Canker – Obscure, but Returning Rhizoctonia Disease

May 23, 2018

Dry rot canker, one of several rhizoctonia diseaes of sugarbeet, has been relatively obscure since first being identified almost a century ago. New technologies, however, have helped to differentiate it from the more common Rhizoctonia root and crown rot disease.

Fungicides are for Fungi

January 8, 2018

Symptoms of bacterial diseases can be easily confused with those of fungal diseases in field crops. This article, from the Proceedings of the 2018 Nebraska Extension Crop Production Clinics, reviews some of the common mistakes made in the major field crops and reviews research on the impact of fungicide use after hail events in corn and soybean.

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