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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1094/PDIS-04-17-0544-RE
|2 doi
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|a eng
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| 100 |
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|a Moral, J
|e verfasserin
|4 aut
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| 245 |
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|a Effects of Wound Size, Amount of Sap, and Number of Blighted Nuts on Infection of Pistachio Organs by Neofusicoccum mediterraneum
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|c 2017
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|a Text
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|a ƒaComputermedien
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|a Date Completed 05.06.2019
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|a Date Revised 05.06.2019
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Laboratory and field studies were conducted to determine the effects of wounding of nut exocarp, susceptibility period after wounding, and sap nut on infection of pistachio nut by Neofusicoccum mediterraneum, the main causal agent of panicle and shoot blight of pistachio. Under controlled conditions and in the field, detached nuts were inoculated with a conidial suspension 30 min before or after wounding. In addition, a 30-µl drop of pistachio sap was placed on the surface of noninjured nuts 30 min before or after they were wounded and then inoculated. Wounding increased the disease severity under both controlled and field conditions. The addition of sap increased the susceptibility of nuts under controlled conditions but not in the field, possibly due to dried sap blocking the pathogen infection. When nuts of Kerman, Kalehghouchi, and Golden Hills pistachio were wounded and inoculated at different time periods after wounding; the nuts of the three cultivars were highly susceptible to pathogen infection during at least the first 24 h after wounding. Under field conditions, there was not a clear effect of increasing the number of inoculated nuts per panicle or the inoculation position (basal or apical) in killing (blight) of the panicle. Conversely, inoculations conducted with mycelial plugs resulted in higher disease, increased the proportion of dead panicles, and resulted in faster symptom expression than inoculations conducted with a conidial suspension. To determine the temporal infection pattern, leaves and panicles were regularly collected from different orchards from 2004 to 2007 and the pathogen was isolated on medium. Important differences in latent infection were detected between years and orchards, with nut and rachis being, in general, the tissues most susceptible to infection. Results of this study help in better understanding the dynamic of infection and colonization of pistachio by N. mediterraneum
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|a Journal Article
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|a Ahimera, N
|e verfasserin
|4 aut
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1 |
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|a Felts, D G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Morgan, D P
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Michailides, T J
|e verfasserin
|4 aut
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| 773 |
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|t Plant disease
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|g 101(2017), 12 vom: 24. Dez., Seite 2027-2033
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|g volume:101
|g year:2017
|g number:12
|g day:24
|g month:12
|g pages:2027-2033
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|u http://dx.doi.org/10.1094/PDIS-04-17-0544-RE
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