Disease Management Products
During the past year several new products have become available for disease management. The new products are summarized in Tables 1 and 2, as well as included in the 2014 Guide for Weed Management in Nebraska with Insecticide and Fungicide Information. In addition, fungicides labeled for use on sorghum and sunflower have also been added to the publication.
Table 1. New Foliar Fungicides
Table 2. New Seed Nematicide
Disease Identification and Management Resource

Giesler, Loren

Harveson, Robert M.

Jackson-Ziems, Tamra A.

Korus, Kevin

Wegulo, Stephen N.

English

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University of Nebraska - Lincoln
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Papers in Plant Pathology Plant Pathology Department
2014
What’s New in Plant Pathology
Tamra A. Jackson-Ziems
University of Nebraska-Lincoln, tjackson3@unl.edu
Loren Giesler
University of Nebraska-Lincoln, lgiesler1@unl.edu
Robert M. Harveson
University of Nebraska-Lincoln, rharveson2@unl.edu
Stephen N. Wegulo
University of Nebraska-Lincoln, swegulo2@unl.edu
Kevin Korus
University of Nebraska-Lincoln, kkorus@ufl.edu
Follow this and additional works at: http://digitalcommons.unl.edu/plantpathpapers
Part of the Other Plant Sciences Commons, Plant Biology Commons, and the Plant Pathology
Commons
This Article is brought to you for free and open access by the Plant Pathology Department at DigitalCommons@University of Nebraska - Lincoln. It
has been accepted for inclusion in Papers in Plant Pathology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln.
Jackson-Ziems, Tamra A.; Giesler, Loren; Harveson, Robert M.; Wegulo, Stephen N.; and Korus, Kevin, "What’s New in Plant
Pathology" (2014). Papers in Plant Pathology. 530.
http://digitalcommons.unl.edu/plantpathpapers/530
What’s New in Plant Pathology 
 
Tamra A. Jackson-Ziems, Extension Plant Pathologist 
Loren Giesler, Extension Plant Pathologist 
Robert M. Harveson, Extension Plant Pathologist 
Stephen N. Wegulo, Extension Plant Pathologist 
Kevin Korus, Extension Educator 
 
 
 
Disease Management Products 
 
During the past year several new products have 
become available for disease management.  The new 
products are summarized in Tables 1 and 2, as well as 
included in the 2014 Guide for Weed Management in 
Nebraska with Insecticide and Fungicide Information.  In 
addition, fungicides labeled for use on sorghum and 
sunflower have also been added to the publication. 
Among the products is a new seed treatment 
nematicide with a new biological mode of action.  The 
organism in the new nematicide, Clariva pn is Pasteuria 
nishizawae Pn1.  This organism is one of several Pasteuria 
species of bacteria.  These bacteria are unique among 
bacteria in that they are gram positive and can form both 
fungal-like mycelia and endospores.  All of the species are 
obligate parasites requiring living hosts for survival. Much 
of the past research on this species has proven parasitism 
on cyst nematodes in the genera Globodera and especially 
Heterodera, such as soybean cyst nematode (Atibalentja et 
al., 2004).  Endospores produced by the bacteria attach to 
the outer cuticle of nematodes when they are in the 
infective second juvenile stage (J2’s).  Bacterial 
endospores will be produced once again later in adult 
females and cysts.  Endospores on J2 cuticles do not 
germinate to produce a germ tube until the nematode 
infects the soybean root.  Then, the bacteria begin dividing 
and growing forming structures that look like cauliflower 
in the J2/J3 nematodes and leads to a sporulation cluster in 
the J4 and females.  The structures continue to grow into 
endospores that fill the cavity of the infected nematode and 
are eventually released into the soil when the nematode 
body disintegrates (Noel, et al., 2005).   
  
 
Disease Identification and Management Resources 
 
The electronic resources formerly housed at the Plant 
Disease Central website have been consolidated to the 
comprehensive Crop Watch website.  Disease 
identification and management resources can be found 
sorted under each crop heading labeled, “Disease 
Management” and includes a list of relevant Crop Watch 
newsletter articles, UNL Extension Publications and other 
resources.   
 
 
 
  
2014 Proceedings :  Crop Production Clinics 
144
Table 1.  New Foliar Fungicides   
Foliar Fungicides Active Ingredient Fungicide Class Labeled Crops 
Aproach picoxystrobin strobilurin barley, chickpea, dry bean, corn, 
oats, rye, sorghum, soybean, 
triticale, wheat and others 
Eminent 125SL tetraconazole triazole sugar beet,  
Endura boscalid carboxamide dry bean, potato, soybean, and 
others 
Fortix fluoxastrobin + flutriafol strobilurin + triazole corn, soybean, sugar beet and 
others 
Quadris Top azoxystrobin + difenoconazole strobilurin + triazole chickpea, millet, oats, potato, rye, 
soybean, sugar beet, and others 
Satori azoxystrobin strobilurin barley, dry bean, chickpea, corn, 
potato, sorghum, soybean, 
sunflower (for oil), triticale, wheat 
and others. 
    
Table 2.  New Seed Treatment Nematicide    
Seed Treatment 
Nematicide 
Active Ingredient Labeled Crops 
Clariva pn Pasteuria nishizawae – Pn1 soybean 
 
 
Literature Cited 
 
Atibalentja, N., Jakstys, B. P., and Noel, G. R.  2004.  Life 
cycle, ultrastructure, and host specificity of the North 
American isolate of Pasteuria that parasitizes the soybean 
cyst nematode, Heterodera glycines.   
 
Noel, G. R., Atibalentja, N., and Domier, L. L.  2005.  
Emended description of Pasteuria nishizawae.  
International Journal of Systemic Evolutionary 
Microbiology  55:1681-1685.    
 
2014 Proceedings: Crop Production Clinics 145


What’s New in Plant Pathology

DigitalCommons@University of Nebraska

University of Nebraska - LincolnDigitalCommons@University of Nebraska - LincolnPapers in Plant Pathology Plant Pathology Department2014What’s New in Plant PathologyTamra A. Jackson-ZiemsUniversity of Nebraska-Lincoln, tjackson3@unl.eduLoren GieslerUniversity of Nebraska-Lincoln, lgiesler1@unl.eduRobert M. HarvesonUniversity of Nebraska-Lincoln, rharveson2@unl.eduStephen N. WeguloUniversity of Nebraska-Lincoln, swegulo2@unl.eduKevin KorusUniversity of Nebraska-Lincoln, kkorus@ufl.eduFollow this and additional works at: http://digitalcommons.unl.edu/plantpathpapersPart of the Other Plant Sciences Commons, Plant Biology Commons, and the Plant PathologyCommonsThis Article is brought to you for free and open access by the Plant Pathology Department at DigitalCommons@University of Nebraska - Lincoln. Ithas been accepted for inclusion in Papers in Plant Pathology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln.Jackson-Ziems, Tamra A.; Giesler, Loren; Harveson, Robert M.; Wegulo, Stephen N.; and Korus, Kevin, "What’s New in PlantPathology" (2014). Papers in Plant Pathology. 530.http://digitalcommons.unl.edu/plantpathpapers/530What’s New in Plant Pathology  Tamra A. Jackson-Ziems, Extension Plant Pathologist Loren Giesler, Extension Plant Pathologist Robert M. Harveson, Extension Plant Pathologist Stephen N. Wegulo, Extension Plant Pathologist Kevin Korus, Extension Educator    Disease Management Products  During the past year several new products have become available for disease management.  The new products are summarized in Tables 1 and 2, as well as included in the 2014 Guide for Weed Management in Nebraska with Insecticide and Fungicide Information.  In addition, fungicides labeled for use on sorghum and sunflower have also been added to the publication. Among the products is a new seed treatment nematicide with a new biological mode of action.  The organism in the new nematicide, Clariva pn is Pasteuria nishizawae Pn1.  This organism is one of several Pasteuria species of bacteria.  These bacteria are unique among bacteria in that they are gram positive and can form both fungal-like mycelia and endospores.  All of the species are obligate parasites requiring living hosts for survival. Much of the past research on this species has proven parasitism on cyst nematodes in the genera Globodera and especially Heterodera, such as soybean cyst nematode (Atibalentja et al., 2004).  Endospores produced by the bacteria attach to the outer cuticle of nematodes when they are in the infective second juvenile stage (J2’s).  Bacterial endospores will be produced once again later in adult females and cysts.  Endospores on J2 cuticles do not germinate to produce a germ tube until the nematode infects the soybean root.  Then, the bacteria begin dividing and growing forming structures that look like cauliflower in the J2/J3 nematodes and leads to a sporulation cluster in the J4 and females.  The structures continue to grow into endospores that fill the cavity of the infected nematode and are eventually released into the soil when the nematode body disintegrates (Noel, et al., 2005).      Disease Identification and Management Resources  The electronic resources formerly housed at the Plant Disease Central website have been consolidated to the comprehensive Crop Watch website.  Disease identification and management resources can be found sorted under each crop heading labeled, “Disease Management” and includes a list of relevant Crop Watch newsletter articles, UNL Extension Publications and other resources.        2014 Proceedings :  Crop Production Clinics 144Table 1.  New Foliar Fungicides   Foliar Fungicides Active Ingredient Fungicide Class Labeled Crops Aproach picoxystrobin strobilurin barley, chickpea, dry bean, corn, oats, rye, sorghum, soybean, triticale, wheat and others Eminent 125SL tetraconazole triazole sugar beet,  Endura boscalid carboxamide dry bean, potato, soybean, and others Fortix fluoxastrobin + flutriafol strobilurin + triazole corn, soybean, sugar beet and others Quadris Top azoxystrobin + difenoconazole strobilurin + triazole chickpea, millet, oats, potato, rye, soybean, sugar beet, and others Satori azoxystrobin strobilurin barley, dry bean, chickpea, corn, potato, sorghum, soybean, sunflower (for oil), triticale, wheat and others.     Table 2.  New Seed Treatment Nematicide    Seed Treatment Nematicide Active Ingredient Labeled Crops Clariva pn Pasteuria nishizawae – Pn1 soybean   Literature Cited  Atibalentja, N., Jakstys, B. P., and Noel, G. R.  2004.  Life cycle, ultrastructure, and host specificity of the North American isolate of Pasteuria that parasitizes the soybean cyst nematode, Heterodera glycines.    Noel, G. R., Atibalentja, N., and Domier, L. L.  2005.  Emended description of Pasteuria nishizawae.  International Journal of Systemic Evolutionary Microbiology  55:1681-1685.     2014 Proceedings: Crop Production Clinics 145

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What’s New in Plant Pathology

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