Single and Combined Effects of the Lesion Nematode andColletotrichum graminicolaon Growth and Anthracnose Leaf Blight of Corn

1985 ◽  
Vol 75 (6) ◽  
pp. 654 ◽  
Author(s):  
R. L. Nicholson
Keyword(s):  
Leaf Blight ◽  
Combined Effects ◽  
Lesion Nematode ◽  
Anthracnose Leaf Blight

STUDIES ON THE ETIOLOGY OF A ROOT ROT OF WINTER WHEAT IN SOUTHWESTERN ONTARIO

1956 ◽  
Vol 34 (1) ◽  
pp. 159-174 ◽  
Author(s):  
W. G. Benedict ◽  
W. B. Mountain
Keyword(s):  
Winter Wheat ◽  
Root Rot ◽  
Pure Culture ◽  
Field Experiments ◽  
Combined Effects ◽  
Root Lesion Nematode ◽  
Wheat Roots ◽  
Culture Techniques ◽  
Naturally Occurring ◽  
Lesion Nematode

The fungus Rhizoctonia solani Kühn and the root-lesion nematode Pratylenchus minyus Sher & Allen were closely and consistently associated in naturally occurring infections of winter wheat. The resultant root rot was characterized by markedly yellowed and stunted patches of plants in the wheat fields during spring growth. In greenhouse and field experiments the combined effects of the fungus and the nematode upon growth of the wheat was almost twice as great as the effect produced when either pathogen was controlled by a selective soil treatment. By pure culture techniques it was not possible to show that in the penetration of wheat roots the fungus was dependent upon the nematode or that the converse was true.

scholarly journals Mixed inheritance model for resistance to anthracnose leaf blight in maize

2004 ◽  
Vol 4 (1) ◽  
pp. 115-122 ◽  
Author(s):  
V.F. Rezende ◽  
R. Vencovsky ◽  
F.E.N. Cárdenas ◽  
H.P. Silva ◽  
E. Bearzoti ◽  
...  
Keyword(s):  
Leaf Blight ◽  
Mixed Inheritance Model ◽  
Inheritance Model ◽  
Anthracnose Leaf Blight

First Report of Anthracnose Leaf Blight of Maize Caused by Colletotrichum graminicola in China

Plant Disease ◽  
2019 ◽  
Vol 103 (7) ◽  
pp. 1770-1770
Author(s):  
C. X. Duan ◽  
C. Guo ◽  
Z. H. Yang ◽  
S. L. Sun ◽  
Z. D. Zhu ◽  
...  
Keyword(s):  
Leaf Blight ◽  
Colletotrichum Graminicola ◽  
First Report ◽  
Anthracnose Leaf Blight

scholarly journals Tillage, Crop Rotation, and Hybrid Effects on Residue and Corn Anthracnose Occurrence in Wisconsin

Plant Disease ◽  
2011 ◽  
Vol 95 (5) ◽  
pp. 601-610 ◽  
Author(s):  
Jennifer C. Jirak-Peterson ◽  
Paul D. Esker
Keyword(s):  
Crop Rotation ◽  
Agricultural Research ◽  
Positive Association ◽  
Leaf Blight ◽  
Research Station ◽  
Colletotrichum Graminicola ◽  
Stalk Rot ◽  
Continuous Corn ◽  
Anthracnose Leaf Blight ◽  
Stalk Lodging

Corn anthracnose (Colletotrichum graminicola) is an important disease of field corn (Zea mays). Two phases, leaf blight and stalk rot, can reduce yield through either premature leaf senescence or reduced grain harvest due to stalk lodging. Corn residue is an important source of primary inoculum and is increased through cultural practices such as no-tillage and continuous corn cropping, which are common practices in Wisconsin. Field studies conducted at the Arlington Agricultural Research Station (ARS) and the West Madison ARS showed that the incidence and severity of anthracnose leaf blight were higher in continuous-corn crop rotations than in soybean–corn rotations (91% higher incidence, 24 to 78% higher severity). Anthracnose stalk rot was marginally affected by tillage in 2008 (P = 0.09), with higher incidence in chisel-plowed treatments. There was a positive association between spring residue cover and anthracnose leaf blight but no association was found between residue and stalk rot. No association was found between anthracnose leaf blight and stalk rot. There was a negative association between anthracnose leaf blight and yield but not between anthracnose stalk rot and yield. Managing residue levels through crop rotation would help to reduce anthracnose leaf blight but further work is needed to elucidate factors that lead to stalk lodging prior to harvest.

scholarly journals Disruption of a Maize 9-Lipoxygenase Results in Increased Resistance to Fungal Pathogens and Reduced Levels of Contamination with Mycotoxin Fumonisin

2007 ◽  
Vol 20 (8) ◽  
pp. 922-933 ◽  
Author(s):  
Xiquan Gao ◽  
Won-Bo Shim ◽  
Cornelia Göbel ◽  
Susan Kunze ◽  
Ivo Feussner ◽  
...  
Keyword(s):  
Fungal Pathogens ◽  
Fusarium Verticillioides ◽  
Fumonisin B1 ◽  
Leaf Blight ◽  
Colletotrichum Graminicola ◽  
Pathway Function ◽  
Mycotoxin Biosynthesis ◽  
Anthracnose Leaf Blight ◽  
Mutator Transposon ◽  
Fatty Acid Hydroperoxides

Plant oxylipins, produced via the lipoxygenase (LOX) pathway, function as signals in defense and development. In fungi, oxylipins are potent regulators of mycotoxin biosynthesis and sporogenesis. Previous studies showed that plant 9-LOX-derived fatty acid hydroperoxides induce conidiation and mycotoxin production. Here, we tested the hypothesis that oxylipins produced by the maize 9-LOX pathway are required by pathogens to produce spores and mycotoxins and to successfully colonize the host. Maize mutants were generated in which the function of a 9-LOX gene, ZmLOX3, was abolished by an insertion of a Mutator transposon in its coding sequence, which resulted in reduced levels of several 9-LOX-derived hydroperoxides. Supporting our hypothesis, conidiation and production of the mycotoxin fumonisin B1 by Fusarium verticillioides were drastically reduced in kernels of the lox3 mutants compared with near-isogenic wild types. Similarly, conidia production and disease severity of anthracnose leaf blight caused by Colletotrichum graminicola were significantly reduced in the lox3 mutants. Moreover, lox3 mutants displayed increased resistance to southern leaf blight caused by Cochliobolus heterostrophus and stalk rots caused by both F. verticillioides and C. graminicola. These data strongly suggest that oxylipin metabolism mediated by a specific plant 9-LOX isoform is required for fungal pathogenesis, including disease development and production of spores and mycotoxins.

A Major Gene for Resistance to Anthracnose Leaf Blight in Maize

1987 ◽  
Vol 98 (3) ◽  
pp. 194-199 ◽  
Author(s):  
B. Badu-Apraku ◽  
V. E. Gracen ◽  
G. C. Bergstrom
Keyword(s):  
Major Gene ◽  
Leaf Blight ◽  
Anthracnose Leaf Blight
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