Cercospora spp. - Interesting Plant Pathogens
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Soybeans, cotton, corn featured at field day at LSU AgCenter Dean Lee ... - Alexandria Town Talk

Soybeans, cotton, corn featured at field day at LSU AgCenter Dean Lee ... - Alexandria Town Talk | Cercospora spp. - Interesting Plant Pathogens | Scoop.it
Soybeans, cotton, corn featured at field day at LSU AgCenter Dean Lee ...
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Cercospora Leaf Spot of Sugarbeet (07/24/13) — NDSU

Cercospora Leaf Spot of Sugarbeet (07/24/13) — NDSU | Cercospora spp. - Interesting Plant Pathogens | Scoop.it
Cercospora leaf spot (Figure 1) is the most damaging leaf disease of sugarbeet in North Dakota and Minnesota.
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First report of strobilurin-insensitive isolates of Cercospora sojina from Arkansas

This presentation is an except from the Arkansas Soybean Research Summit held in Forrest City, Arkansas on December 4th, 2012.

Via Melvin Bolton
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Film Clips: July 25, 2013 - Yakima Herald-Republic

Film Clips: July 25, 2013 - Yakima Herald-Republic | Cercospora spp. - Interesting Plant Pathogens | Scoop.it
Film Clips: July 25, 2013
Yakima Herald-Republic
Starring Charlie Hunnam, Idris Elba, Charlie Day, Ron Perlman and Rinko Kikuchi.
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Sugarbeet Cercospora fungicide resistance management - Michigan State University Extension

Sugarbeet Cercospora fungicide resistance management
Michigan State University Extension
A Cercospora leaf spot survey was taken in the fall of 2012 by Michigan Sugar Company.
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Identification of the G143A mutation associated with QoI resistance in Cercospora beticola field isolates from Michigan, United States - Pest Management Science

Identification of the G143A mutation associated with QoI resistance in Cercospora beticola field isolates from Michigan, United States - Pest Management Science | Cercospora spp. - Interesting Plant Pathogens | Scoop.it

BACKGROUND: Cercospora leaf spot (CLS), caused by the fungus Cercospora beticola, is the most serious foliar disease of sugar beet (Beta vulgaris L.) worldwide. Disease control is mainly achieved by timely fungicide applications. In 2011, CLS control failures were reported in spite of application of quinone outside inhibitor (QoI) fungicide in several counties in Michigan, United States. The purpose of this study was to confirm the resistant phenotype and identify the molecular basis for QoI resistance of Michigan C. beticola isolates.

RESULTS: Isolates collected in Michigan in 1998 and 1999 that had no previous exposure to the QoI fungicides trifloxystrobin or pyraclostrobin exhibited QoI EC50 values of ⩽0.006 µg mL−1. In contrast, all isolates obtained in 2011 exhibited EC50 values of > 0.92 µg mL−1 to both fungicides and harbored a mutation in cytochrome b (cytb) that led to an amino acid exchange from glycine to alanine at position 143 (G143A) compared with baseline QoI-sensitive isolates. Microsatellite analysis of the isolates suggested that QoI resistance emerged independently in multiple genotypic backgrounds at multiple locations. A real-time PCR assay utilizing dual-labeled fluorogenic probes was developed to detect and differentiate QoI-resistant isolates harboring the G143A mutation from sensitive isolates.

CONCLUSION: The G143A mutation in cytb is associated with QoI resistance in C. beticola. Accurate monitoring of this mutation will be essential for fungicide resistance management in this pathosystem.


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