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|a 10.1094/PDIS-08-18-1350-RE
|2 doi
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|a pubmed24n0989.xml
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Zhu, Yi
|e verfasserin
|4 aut
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| 245 |
1 |
0 |
|a Etiology of Alternaria Leaf Spot of Cotton in Southern New Mexico
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| 264 |
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1 |
|c 2019
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| 336 |
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|a Text
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|a ƒaComputermedien
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|a Date Completed 05.08.2019
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|a Date Revised 05.08.2019
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Alternaria leaf spot (caused by Alternaria spp.) is one of the most common foliar diseases of cotton (Gossypium spp.) and occurs in most cotton-growing regions of the world. In surveys of commercial cotton fields, Alternaria leaf spot has increased in prevalence and incidence in southern New Mexico due to favorable environmental conditions in recent years. Incidence, severity, and etiology of leaf spot of cotton in southern New Mexico were determined. Fourteen cotton fields with plants exhibiting leaf spot symptoms were evaluated in October and November 2016, when plants were at late growth stage. Disease incidence was 100% in 13 of the fields, and averaged 70% in the 14th field. Average disease severity index for all fields ranged from 21.5 to 87.0. For identification of the causal agent, 14 isolates (one from each field) were characterized based on morphological features and PCR using universal primers ITS4/ITS5 and primers targeting the plasma membrane ATPase gene. Colonies of all 14 isolates were olive green with distinct white margins and relatively small spores when compared with reference isolates of large-spored species. All 14 isolates were identified as A. alternata. The fungus grew on potato dextrose agar from 5 to 35°C, and optimum growth occurred at temperatures between 20 and 30°C. Cotton plants inoculated with selected isolates of A. alternata displayed symptoms similar to those observed under field conditions. This is the first report of A. alternata as a causal agent of Alternaria leaf spot on cotton in southern New Mexico
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|a Journal Article
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|a spp.
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|a identification
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|a leaf spot
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| 650 |
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| 650 |
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7 |
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|2 NLM
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| 700 |
1 |
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|a Lujan, Phillip
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|4 aut
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| 700 |
1 |
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|a Dura, Srijana
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Steiner, Robert
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Jinfa
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sanogo, Soum
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Plant disease
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