Paper · 1999 · Plant Disease

Reduced Sensitivity in Monilinia fructicola to Propiconazole Following Prolonged Exposure in Peach Orchards

Eldon I. Zehr; Lynn A. Luszcz; William C. Olien; et al.

5
claims
10
verbatim quotes
66
citations
2
research areas
—
Not open access

Abstract

The baseline sensitivity of Monilinia fructicola in a peach orchard not previously exposed to demethylation-inhibiting (DMI) fungicides was determined for propiconazole, using the concentration in an agar medium required to suppress radial growth of mycelium by 50% (EC 50 ) The baseline sensitivity was found to be approximately 0.03 μg/ml. Prolonged, regular exposure of the natural population of M. fructicola to propiconazole in the test orchard over a 3-year period (29 total applications) resulted in a wider range of sensitivity (EC 50 of 0.02 to 2.16μg/ml) among isolates than was observed in the initial population (EC 50 of 0.02 to 0.15 μg/ml). Comparisons with isolates from commercial orchards where DMI fungicides were used regularly showed that sensitivities were comparable to, or less than, those of isolates from the population in the test orchard that had been exposed to propiconazole for the 3-year period. M. fructicola in South Carolina peach orchards might now be less sensitive to DMI fungicides than when those fungicides were first introduced for brown rot control, although effective disease control in the field has been maintained.

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Claims 5

Observationobservedoriginal resultmeasured

Claim · model-written summary

Baseline sensitivity of Monilinia fructicola to propiconazole in a peach orchard not previously exposed to DMI fungicides was approximately 0.03 μg/ml (EC50).

Interactor
Monilinia fructicolaMonilinia fructicolae0pathogen
Compound
propiconazolee0
Outcome
baseline sensitivitye0
Value
approximately 0.03 μg/mle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗
Monilinia fructicola
Monilinia fructicola · InteractorMary Ann Hansen · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Peach Orchards”

✓ located verbatim in the source · title, characters 93–107 · show in text ↑
e0

“The baseline sensitivity of Monilinia fructicola in a peach orchard not previously exposed to demethylation-inhibiting (DMI) fungicides was determined for propiconazole, using the concentration in an agar medium required to suppress radial growth of mycelium by 50% (EC 50 ) The baseline sensitivity was found to be approximately 0.03 μg/ml”

✓ located verbatim in the source · abstract, characters 0–340 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Prolonged regular propiconazole exposure over 3 years widened the range of M. fructicola sensitivity among isolates (EC50 0.02 to 2.16 μg/ml) relative to the initial population (EC50 0.02 to 0.15 μg/ml).

Treatment
propiconazole in the test orchard over a 3-year period (29 total applications)e1
Interactor
M. fructicolaMonilinia fructicolae1pathogen
Outcome
range of sensitivitye1
Direction
widere1
Value
0.02 to 2.16μg/mle1
Comparator
initial populatione1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗
Monilinia fructicola
Monilinia fructicola · InteractorMary Ann Hansen · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Peach Orchards”

✓ located verbatim in the source · title, characters 93–107 · show in text ↑
e1

“Prolonged, regular exposure of the natural population of M. fructicola to propiconazole in the test orchard over a 3-year period (29 total applications) resulted in a wider range of sensitivity (EC 50 of 0.02 to 2.16μg/ml) among isolates than was observed in the initial population (EC 50 of 0.02 to 0.15 μg/ml)”

✓ located verbatim in the source · abstract, characters 342–653 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Isolates from commercial orchards with regular DMI use had sensitivities comparable to, or lower than, isolates from the 3-year-exposed test orchard population.

Outcome
sensitivitiese2
Comparator
isolates from the population in the test orcharde2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

t0

“Peach Orchards”

✓ located verbatim in the source · title, characters 93–107 · show in text ↑
e2

“Comparisons with isolates from commercial orchards where DMI fungicides were used regularly showed that sensitivities were comparable to, or less than, those of isolates from the population in the test orchard that had been exposed to propiconazole for the 3-year period”

✓ located verbatim in the source · abstract, characters 655–925 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Effective disease control of brown rot in the field has been maintained despite the sensitivity shifts.

Outcome
effective disease control in the fielde3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗

Verbatim

t0

“Peach Orchards”

✓ located verbatim in the source · title, characters 93–107 · show in text ↑
e3

“although effective disease control in the field has been maintained”

✓ located verbatim in the source · abstract, characters 1092–1159 · show in text ↑
Observationhypothesisoriginal resultnegativemeasured

Claim · model-written summary

M. fructicola in South Carolina peach orchards might now be less sensitive to DMI fungicides than when those fungicides were first introduced for brown rot control.

Interactor
M. fructicolaMonilinia fructicolae4pathogen
Outcome
sensitive to DMI fungicidese4
Qualifier
might nowe4
Setting
South Carolina peach orchardse4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Prunus persica
Prunus persica · TaxonAllagash Brewing · CC BY 2.0 · Wikimedia Commons ↗
Monilinia fructicola
Monilinia fructicola · InteractorMary Ann Hansen · CC BY 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Peach Orchards”

✓ located verbatim in the source · title, characters 93–107 · show in text ↑
e4

“M. fructicola in South Carolina peach orchards might now be less sensitive to DMI fungicides than when those fungicides were first introduced for brown rot control”

✓ located verbatim in the source · abstract, characters 927–1090 · show in text ↑

propiconazole · Monilinia fructicola · Prunus persica (peach)Results agree

4 papers: 0 positive, 4 negative or no effect

3 papers in the same direction as this paper

  1. negative
  2. negative
  3. negative
See all 4 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.