Monitoring conidial density of Monilinia fructigena in the air in relation to brown rot development in integrated and organic apple orchards

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In a three-year Hungarian study, conidial density of Monilinia fructigena in the air determined from mid-May until harvest was related to brown rot disease progress in integrated and organic apple orchards. Conidia of M. fructigena were first trapped in late May in both orchards in all years. Number of conidial density greatly increased after the appearance of first infected fruit, from early July in the organic and from early August in the integrated orchard. Conidial number continuously increased until harvest in both orchards. Final brown rot incidence reached 4.3-6.6% and 19.8-24.5% in the integrated and organic orchards, respectively. Disease incidence showed a significant relationship with corresponding cumulative numbers of trapped conidia both in integrated and organic orchards, and was described by separate three-parameter Gompertz functions for the two orchards. Time series analyses, using autoregressive integrated moving average (ARIMA) models, revealed that the temporal patterns of the number of airborne conidia was similar in all years in both integrated and organic orchards. Conidia caught over a 24-h period showed distinct diurnal periodicity, with peak spore density occurring in the afternoon between 13.00 and 18.00. Percent viability of M. fructigena conidia ranged from 48.8 to 70.1% with lower viability in dry compared to wet days in both orchards and all years. Temperature and relative humidity correlated best with mean hourly conidial catches in both integrated and organic apple orchards in each year. Correlations between aerial spore density and wind speed were significant only in the organic orchard over the 3-year period. Mean hourly rainfall was negatively but poorly correlated with mean hourly conidial catches. Results were compared and discussed with previous observations.

Original languageEnglish
Pages (from-to)397-408
Number of pages12
JournalEuropean Journal of Plant Pathology
Volume120
Issue number4
DOIs
Publication statusPublished - Apr 2008

Fingerprint

Monilinia fructigena
orchards
apples
air
monitoring
conidia
spores
viability
angle of incidence
periodicity
wind speed
disease incidence
time series analysis

Keywords

  • Aerial spore density
  • Apple
  • Brown rot fungi
  • Disease incidence
  • Epidemiology
  • Integrated
  • Monilinia fructigena
  • Organic
  • Spore dispersal
  • Viability
  • Weather variables

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Horticulture
  • Plant Science

Cite this

@article{f9cc07f7edd446ab8d02ef2293943c5b,
title = "Monitoring conidial density of Monilinia fructigena in the air in relation to brown rot development in integrated and organic apple orchards",
abstract = "In a three-year Hungarian study, conidial density of Monilinia fructigena in the air determined from mid-May until harvest was related to brown rot disease progress in integrated and organic apple orchards. Conidia of M. fructigena were first trapped in late May in both orchards in all years. Number of conidial density greatly increased after the appearance of first infected fruit, from early July in the organic and from early August in the integrated orchard. Conidial number continuously increased until harvest in both orchards. Final brown rot incidence reached 4.3-6.6{\%} and 19.8-24.5{\%} in the integrated and organic orchards, respectively. Disease incidence showed a significant relationship with corresponding cumulative numbers of trapped conidia both in integrated and organic orchards, and was described by separate three-parameter Gompertz functions for the two orchards. Time series analyses, using autoregressive integrated moving average (ARIMA) models, revealed that the temporal patterns of the number of airborne conidia was similar in all years in both integrated and organic orchards. Conidia caught over a 24-h period showed distinct diurnal periodicity, with peak spore density occurring in the afternoon between 13.00 and 18.00. Percent viability of M. fructigena conidia ranged from 48.8 to 70.1{\%} with lower viability in dry compared to wet days in both orchards and all years. Temperature and relative humidity correlated best with mean hourly conidial catches in both integrated and organic apple orchards in each year. Correlations between aerial spore density and wind speed were significant only in the organic orchard over the 3-year period. Mean hourly rainfall was negatively but poorly correlated with mean hourly conidial catches. Results were compared and discussed with previous observations.",
keywords = "Aerial spore density, Apple, Brown rot fungi, Disease incidence, Epidemiology, Integrated, Monilinia fructigena, Organic, Spore dispersal, Viability, Weather variables",
author = "I. Holb",
year = "2008",
month = "4",
doi = "10.1007/s10658-007-9233-6",
language = "English",
volume = "120",
pages = "397--408",
journal = "European Journal of Plant Pathology",
issn = "0929-1873",
publisher = "Springer Netherlands",
number = "4",

}

TY - JOUR

T1 - Monitoring conidial density of Monilinia fructigena in the air in relation to brown rot development in integrated and organic apple orchards

AU - Holb, I.

PY - 2008/4

Y1 - 2008/4

N2 - In a three-year Hungarian study, conidial density of Monilinia fructigena in the air determined from mid-May until harvest was related to brown rot disease progress in integrated and organic apple orchards. Conidia of M. fructigena were first trapped in late May in both orchards in all years. Number of conidial density greatly increased after the appearance of first infected fruit, from early July in the organic and from early August in the integrated orchard. Conidial number continuously increased until harvest in both orchards. Final brown rot incidence reached 4.3-6.6% and 19.8-24.5% in the integrated and organic orchards, respectively. Disease incidence showed a significant relationship with corresponding cumulative numbers of trapped conidia both in integrated and organic orchards, and was described by separate three-parameter Gompertz functions for the two orchards. Time series analyses, using autoregressive integrated moving average (ARIMA) models, revealed that the temporal patterns of the number of airborne conidia was similar in all years in both integrated and organic orchards. Conidia caught over a 24-h period showed distinct diurnal periodicity, with peak spore density occurring in the afternoon between 13.00 and 18.00. Percent viability of M. fructigena conidia ranged from 48.8 to 70.1% with lower viability in dry compared to wet days in both orchards and all years. Temperature and relative humidity correlated best with mean hourly conidial catches in both integrated and organic apple orchards in each year. Correlations between aerial spore density and wind speed were significant only in the organic orchard over the 3-year period. Mean hourly rainfall was negatively but poorly correlated with mean hourly conidial catches. Results were compared and discussed with previous observations.

AB - In a three-year Hungarian study, conidial density of Monilinia fructigena in the air determined from mid-May until harvest was related to brown rot disease progress in integrated and organic apple orchards. Conidia of M. fructigena were first trapped in late May in both orchards in all years. Number of conidial density greatly increased after the appearance of first infected fruit, from early July in the organic and from early August in the integrated orchard. Conidial number continuously increased until harvest in both orchards. Final brown rot incidence reached 4.3-6.6% and 19.8-24.5% in the integrated and organic orchards, respectively. Disease incidence showed a significant relationship with corresponding cumulative numbers of trapped conidia both in integrated and organic orchards, and was described by separate three-parameter Gompertz functions for the two orchards. Time series analyses, using autoregressive integrated moving average (ARIMA) models, revealed that the temporal patterns of the number of airborne conidia was similar in all years in both integrated and organic orchards. Conidia caught over a 24-h period showed distinct diurnal periodicity, with peak spore density occurring in the afternoon between 13.00 and 18.00. Percent viability of M. fructigena conidia ranged from 48.8 to 70.1% with lower viability in dry compared to wet days in both orchards and all years. Temperature and relative humidity correlated best with mean hourly conidial catches in both integrated and organic apple orchards in each year. Correlations between aerial spore density and wind speed were significant only in the organic orchard over the 3-year period. Mean hourly rainfall was negatively but poorly correlated with mean hourly conidial catches. Results were compared and discussed with previous observations.

KW - Aerial spore density

KW - Apple

KW - Brown rot fungi

KW - Disease incidence

KW - Epidemiology

KW - Integrated

KW - Monilinia fructigena

KW - Organic

KW - Spore dispersal

KW - Viability

KW - Weather variables

UR - http://www.scopus.com/inward/record.url?scp=40049110625&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=40049110625&partnerID=8YFLogxK

U2 - 10.1007/s10658-007-9233-6

DO - 10.1007/s10658-007-9233-6

M3 - Article

VL - 120

SP - 397

EP - 408

JO - European Journal of Plant Pathology

JF - European Journal of Plant Pathology

SN - 0929-1873

IS - 4

ER -