Effect of production system and pruning on temporal development of Cercospora depazeoides and on berry yield in black elderberry orchards

I. Holb, J. M. Gáll, B. Fodor

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In a 2-year study, the temporal development of Cercospora leaf spot (Cercospora depazeoides) and berry yield were evaluated in two production systems (integrated and organic) and in two winter pruning treatments (trees pruned to four and eight scaffolds) in two black elderberry (Sambucus nigra) orchards in Hungary. Under organic production, leaf spot onset occurred 2 to 4 weeks earlier (mid-and late July) in both years and both orchards compared with the integrated program. Disease then continuously progressed until the final assessment date (late September) in both years, reaching a maximum final disease incidence of 15.9% in the integrated system and of 38.2% in the organic system. In general, disease progress after late August was greater on trees pruned to eight scaffolds than on trees pruned to four scaffolds in both production systems. Both final disease incidence and area under the disease progress curves (AUDPC) were significantly lower (P <0.001) in the integrated treatments compared with organic ones. Across all treatments, both disease measures were significantly (P <0.05) lower on trees pruned to four scaffolds compared with trees pruned to eight scaffolds. However, when the effect of pruning on final disease incidence and AUDPC was analyzed separately for integrated and organic systems, pruning caused uniformly significant differences in disease development only for the organic system. Berry yield was significantly higher (P <0.05) in the integrated system compared with the organic system, but pruning showed no significant effect on yield. Overall, pruning to four scaffolds resulted in consistently lower disease development in organic production compared to integrated. Thus, winter pruning may be useful as a Cercospora leaf spot management practice in organic elderberry orchards.

Original languageEnglish
Pages (from-to)625-631
Number of pages7
JournalPlant Disease
Volume93
Issue number6
DOIs
Publication statusPublished - Jun 2009

Fingerprint

elderberries
Cercospora
pruning
small fruits
production technology
orchards
leaf spot
disease incidence
organic production
Sambucus nigra
integrated agricultural systems
winter
Hungary

ASJC Scopus subject areas

  • Plant Science
  • Agronomy and Crop Science

Cite this

Effect of production system and pruning on temporal development of Cercospora depazeoides and on berry yield in black elderberry orchards. / Holb, I.; Gáll, J. M.; Fodor, B.

In: Plant Disease, Vol. 93, No. 6, 06.2009, p. 625-631.

Research output: Contribution to journalArticle

@article{1ed1565984c24345ab69c2cae283e605,
title = "Effect of production system and pruning on temporal development of Cercospora depazeoides and on berry yield in black elderberry orchards",
abstract = "In a 2-year study, the temporal development of Cercospora leaf spot (Cercospora depazeoides) and berry yield were evaluated in two production systems (integrated and organic) and in two winter pruning treatments (trees pruned to four and eight scaffolds) in two black elderberry (Sambucus nigra) orchards in Hungary. Under organic production, leaf spot onset occurred 2 to 4 weeks earlier (mid-and late July) in both years and both orchards compared with the integrated program. Disease then continuously progressed until the final assessment date (late September) in both years, reaching a maximum final disease incidence of 15.9{\%} in the integrated system and of 38.2{\%} in the organic system. In general, disease progress after late August was greater on trees pruned to eight scaffolds than on trees pruned to four scaffolds in both production systems. Both final disease incidence and area under the disease progress curves (AUDPC) were significantly lower (P <0.001) in the integrated treatments compared with organic ones. Across all treatments, both disease measures were significantly (P <0.05) lower on trees pruned to four scaffolds compared with trees pruned to eight scaffolds. However, when the effect of pruning on final disease incidence and AUDPC was analyzed separately for integrated and organic systems, pruning caused uniformly significant differences in disease development only for the organic system. Berry yield was significantly higher (P <0.05) in the integrated system compared with the organic system, but pruning showed no significant effect on yield. Overall, pruning to four scaffolds resulted in consistently lower disease development in organic production compared to integrated. Thus, winter pruning may be useful as a Cercospora leaf spot management practice in organic elderberry orchards.",
author = "I. Holb and G{\'a}ll, {J. M.} and B. Fodor",
year = "2009",
month = "6",
doi = "10.1094/PDIS-93-6-0625",
language = "English",
volume = "93",
pages = "625--631",
journal = "Plant Disease",
issn = "0191-2917",
publisher = "American Phytopathological Society",
number = "6",

}

TY - JOUR

T1 - Effect of production system and pruning on temporal development of Cercospora depazeoides and on berry yield in black elderberry orchards

AU - Holb, I.

AU - Gáll, J. M.

AU - Fodor, B.

PY - 2009/6

Y1 - 2009/6

N2 - In a 2-year study, the temporal development of Cercospora leaf spot (Cercospora depazeoides) and berry yield were evaluated in two production systems (integrated and organic) and in two winter pruning treatments (trees pruned to four and eight scaffolds) in two black elderberry (Sambucus nigra) orchards in Hungary. Under organic production, leaf spot onset occurred 2 to 4 weeks earlier (mid-and late July) in both years and both orchards compared with the integrated program. Disease then continuously progressed until the final assessment date (late September) in both years, reaching a maximum final disease incidence of 15.9% in the integrated system and of 38.2% in the organic system. In general, disease progress after late August was greater on trees pruned to eight scaffolds than on trees pruned to four scaffolds in both production systems. Both final disease incidence and area under the disease progress curves (AUDPC) were significantly lower (P <0.001) in the integrated treatments compared with organic ones. Across all treatments, both disease measures were significantly (P <0.05) lower on trees pruned to four scaffolds compared with trees pruned to eight scaffolds. However, when the effect of pruning on final disease incidence and AUDPC was analyzed separately for integrated and organic systems, pruning caused uniformly significant differences in disease development only for the organic system. Berry yield was significantly higher (P <0.05) in the integrated system compared with the organic system, but pruning showed no significant effect on yield. Overall, pruning to four scaffolds resulted in consistently lower disease development in organic production compared to integrated. Thus, winter pruning may be useful as a Cercospora leaf spot management practice in organic elderberry orchards.

AB - In a 2-year study, the temporal development of Cercospora leaf spot (Cercospora depazeoides) and berry yield were evaluated in two production systems (integrated and organic) and in two winter pruning treatments (trees pruned to four and eight scaffolds) in two black elderberry (Sambucus nigra) orchards in Hungary. Under organic production, leaf spot onset occurred 2 to 4 weeks earlier (mid-and late July) in both years and both orchards compared with the integrated program. Disease then continuously progressed until the final assessment date (late September) in both years, reaching a maximum final disease incidence of 15.9% in the integrated system and of 38.2% in the organic system. In general, disease progress after late August was greater on trees pruned to eight scaffolds than on trees pruned to four scaffolds in both production systems. Both final disease incidence and area under the disease progress curves (AUDPC) were significantly lower (P <0.001) in the integrated treatments compared with organic ones. Across all treatments, both disease measures were significantly (P <0.05) lower on trees pruned to four scaffolds compared with trees pruned to eight scaffolds. However, when the effect of pruning on final disease incidence and AUDPC was analyzed separately for integrated and organic systems, pruning caused uniformly significant differences in disease development only for the organic system. Berry yield was significantly higher (P <0.05) in the integrated system compared with the organic system, but pruning showed no significant effect on yield. Overall, pruning to four scaffolds resulted in consistently lower disease development in organic production compared to integrated. Thus, winter pruning may be useful as a Cercospora leaf spot management practice in organic elderberry orchards.

UR - http://www.scopus.com/inward/record.url?scp=67650090621&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67650090621&partnerID=8YFLogxK

U2 - 10.1094/PDIS-93-6-0625

DO - 10.1094/PDIS-93-6-0625

M3 - Article

VL - 93

SP - 625

EP - 631

JO - Plant Disease

JF - Plant Disease

SN - 0191-2917

IS - 6

ER -