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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-07-16-0981-RE
|2 doi
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|a eng
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| 100 |
1 |
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|a He, Lei-Ming
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Activity, Translocation, and Persistence of Isopyrazam for Controlling Cucumber Powdery Mildew
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| 264 |
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|c 2017
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| 336 |
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|a Text
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|a ƒaComputermedien
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|a Date Revised 20.11.2019
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a A cotyledon bioassay was conducted to assess the activity of isopyrazam against Podosphaera xanthii (Castagne) U. Braun & N. Shishkoff, causal agent of cucumber powdery mildew. Results showed that isopyrazam has protective and curative activity against P. xanthii, with EC50 values of 0.04 and 0.05 mg liter-1, respectively. These activities are higher than those for hexaconazole, difenoconazole, pyraclostrobin, kresoxim-methyl, and azoxystrobin, fungicides currently used against cucumber powdery mildew. Isopyrazam at 0.5 mg liter-1 damaged conidiophores. Results of inoculation tests in greenhouse pots indicate that isopyrazam demonstrates a level of systemic movement in cucumber plants, especially regarding translaminar and transverse translocation. Efficacy following translaminar and transverse translocations on cotyledons and leaves treated with 60 mg liter-1 was 94.40% and 88.96%, and 95.26% and 82.83%, respectively. In addition, isopyrazam at 60 mg liter-1 exhibited a long duration of efficacy against cucumber powdery mildew, almost 2 to 3 weeks longer than that of triazoles and strobilurins. Similar trends in residual durations were observed during 2014 and 2015 greenhouse trials. Isopyrazam at 30 and 60 a.i. g ha-1 provided efficacy ranging from 83.27 to 90.83% 20 days following treatment. In conclusion, isopyrazam has translaminar and transverse translocation in cucumber leaves, and long duration of activity against cucumber powdery mildew
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| 650 |
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4 |
|a Journal Article
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1 |
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|a Cui, Kai-di
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ma, Di-Cheng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shen, Rui-Ping
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Huang, Xue-Ping
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jiang, Jian-Gong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mu, Wei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Feng
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Plant disease
|d 1997
|g 101(2017), 7 vom: 01. Juli, Seite 1139-1144
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|g volume:101
|g year:2017
|g number:7
|g day:01
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|g pages:1139-1144
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