Survival and sporulation of Colletotrichum acutatum on symptomless strawberry leaves

L. F.S. Leandro, M. L. Gleason, S. N. Wegulo, F. W. Nutter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Anthracnose caused by Colletotrichum acutatum is an important disease of strawberry worldwide. The ecology of the pathogen on symptomless plants is not well understood and may be important in disease epidemics. The aim of this study was to characterize and quantify the development of C. acutatum on strawberry foliage. Detached strawberry leaves were spray-inoculated with a conidial suspension and incubated at 26°C and 100% relative humidity. Leaf disks were sampled at 3, 6, 9, 12, 15, 18, 21, 24, 36, 48, 72, 96, 144 and 168 h after inoculation, fixed in glutaraldehyde, cleared in chloral hydrate and observed microscopically. Conidial germination, development of appressoria and the production of secondary conidia were observed and quantified over time on a unit area basis. C. acutatum germinated, formed melanized structures and produced secondary conidia on symptomless strawberry leaves. Secondary conidia were produced by microcyclic conidiation on conidial phialides and on short hyphal phialides. These conidia were produced on leaves in the absence of acervular development, suggesting that secondary sporulation on symptomless plants can be a significant source of inoculum for flower and fruit infections.

Original languageEnglish (US)
Title of host publicationIV International Strawberry Symposium
PublisherInternational Society for Horticultural Science
Pages627-629
Number of pages3
ISBN (Print)9789066057753
DOIs
StatePublished - Jan 1 2002

Publication series

NameActa Horticulturae
Volume567
ISSN (Print)0567-7572

Fingerprint

Colletotrichum acutatum
sporulation
strawberries
conidia
leaves
chloral hydrate
appressoria
secondary productivity
glutaraldehyde
anthracnose
relative humidity
inoculum
germination
flowers
ecology
fruits
pathogens
infection

Keywords

  • Anthracnose
  • Ecology
  • Epidemiology
  • Germination
  • Microcyclic conidiation

ASJC Scopus subject areas

  • Horticulture

Cite this

Leandro, L. F. S., Gleason, M. L., Wegulo, S. N., & Nutter, F. W. (2002). Survival and sporulation of Colletotrichum acutatum on symptomless strawberry leaves. In IV International Strawberry Symposium (pp. 627-629). (Acta Horticulturae; Vol. 567). International Society for Horticultural Science. https://doi.org/10.17660/ActaHortic.2002.567.135

Survival and sporulation of Colletotrichum acutatum on symptomless strawberry leaves. / Leandro, L. F.S.; Gleason, M. L.; Wegulo, S. N.; Nutter, F. W.

IV International Strawberry Symposium. International Society for Horticultural Science, 2002. p. 627-629 (Acta Horticulturae; Vol. 567).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Leandro, LFS, Gleason, ML, Wegulo, SN & Nutter, FW 2002, Survival and sporulation of Colletotrichum acutatum on symptomless strawberry leaves. in IV International Strawberry Symposium. Acta Horticulturae, vol. 567, International Society for Horticultural Science, pp. 627-629. https://doi.org/10.17660/ActaHortic.2002.567.135
Leandro LFS, Gleason ML, Wegulo SN, Nutter FW. Survival and sporulation of Colletotrichum acutatum on symptomless strawberry leaves. In IV International Strawberry Symposium. International Society for Horticultural Science. 2002. p. 627-629. (Acta Horticulturae). https://doi.org/10.17660/ActaHortic.2002.567.135
Leandro, L. F.S. ; Gleason, M. L. ; Wegulo, S. N. ; Nutter, F. W. / Survival and sporulation of Colletotrichum acutatum on symptomless strawberry leaves. IV International Strawberry Symposium. International Society for Horticultural Science, 2002. pp. 627-629 (Acta Horticulturae).
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