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Comparison of rain effects on splash dispersal of three colletotrichum species infecting strawberry.
Phytopathology 1999; 89(7):555-63P

Abstract

ABSTRACT

Rain simulation studies were performed to compare splash dispersal of three Colletotrichum species: C. acutatum (C. acutatum-O isolate from Ohio and C. acutatum-M isolate from Mississippi), C. fragariae (isolate from Mississippi), and C. gloeosporioides (isolate from Florida). Conidial dispersal was assessed by counting colonies formed from spore-bearing splash droplets deposited in sheltered petri plates containing a selective medium. Colonies were converted to number of conidia based on germination rates of spores on the media. The interpolated total number of dispersed conidia over a 61 min rain and 72 cm from the point source (Sigma) was calculated. For all species, a rain intensity of 30-mm/h resulted in significantly greater dispersal than an intensity of 11-mm/h. C. fragariae had the lowest amount of spore dispersal, and C. acutatum-O had the highest dispersal. C. acutatum-M and C. gloeosporioides were intermediate in magnitude of conidial splash dispersal. However, differences were directly attributed to differences in spore density per fruit at the source. When Sigma was corrected for source strength (Sigma(r)), the species were very similar, with only C. acutatum-M having a mean Sigma(r) significantly less than the others. Proportions and rates of spore removal (per minute) from source fruits were higher for C. acutatum-O and C. gloeosporioides than for other isolates. Wash-off rates of conidia deposited on healthy fruits were the same for all species. Deposition flux density of spores that had been uniformly sprayed over the entire soil surface of the experimental area was affected by species. A significant difference in means was observed between C. acutatum and C. fragariae-the latter had a somewhat lower flux density. This is the first demonstration that closely related species infecting the same plant species are similar in terms of splash dispersal.

Authors

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Pub Type(s)

Journal Article

Language

eng

PubMed ID

18944690

Citation

Ntahimpera, N, et al. "Comparison of Rain Effects On Splash Dispersal of Three Colletotrichum Species Infecting Strawberry." Phytopathology, vol. 89, no. 7, 1999, pp. 555-63.
Ntahimpera N, Wilson LL, Ellis MA, et al. Comparison of rain effects on splash dispersal of three colletotrichum species infecting strawberry. Phytopathology. 1999;89(7):555-63.
Ntahimpera, N., Wilson, L. L., Ellis, M. A., & Madden, L. V. (1999). Comparison of rain effects on splash dispersal of three colletotrichum species infecting strawberry. Phytopathology, 89(7), pp. 555-63. doi:10.1094/PHYTO.1999.89.7.555.
Ntahimpera N, et al. Comparison of Rain Effects On Splash Dispersal of Three Colletotrichum Species Infecting Strawberry. Phytopathology. 1999;89(7):555-63. PubMed PMID: 18944690.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of rain effects on splash dispersal of three colletotrichum species infecting strawberry. AU - Ntahimpera,N, AU - Wilson,L L, AU - Ellis,M A, AU - Madden,L V, PY - 2008/10/24/pubmed PY - 2008/10/24/medline PY - 2008/10/24/entrez SP - 555 EP - 63 JF - Phytopathology JO - Phytopathology VL - 89 IS - 7 N2 - ABSTRACT Rain simulation studies were performed to compare splash dispersal of three Colletotrichum species: C. acutatum (C. acutatum-O isolate from Ohio and C. acutatum-M isolate from Mississippi), C. fragariae (isolate from Mississippi), and C. gloeosporioides (isolate from Florida). Conidial dispersal was assessed by counting colonies formed from spore-bearing splash droplets deposited in sheltered petri plates containing a selective medium. Colonies were converted to number of conidia based on germination rates of spores on the media. The interpolated total number of dispersed conidia over a 61 min rain and 72 cm from the point source (Sigma) was calculated. For all species, a rain intensity of 30-mm/h resulted in significantly greater dispersal than an intensity of 11-mm/h. C. fragariae had the lowest amount of spore dispersal, and C. acutatum-O had the highest dispersal. C. acutatum-M and C. gloeosporioides were intermediate in magnitude of conidial splash dispersal. However, differences were directly attributed to differences in spore density per fruit at the source. When Sigma was corrected for source strength (Sigma(r)), the species were very similar, with only C. acutatum-M having a mean Sigma(r) significantly less than the others. Proportions and rates of spore removal (per minute) from source fruits were higher for C. acutatum-O and C. gloeosporioides than for other isolates. Wash-off rates of conidia deposited on healthy fruits were the same for all species. Deposition flux density of spores that had been uniformly sprayed over the entire soil surface of the experimental area was affected by species. A significant difference in means was observed between C. acutatum and C. fragariae-the latter had a somewhat lower flux density. This is the first demonstration that closely related species infecting the same plant species are similar in terms of splash dispersal. SN - 0031-949X UR - https://www.unboundmedicine.com/medline/citation/18944690/Comparison_of_rain_effects_on_splash_dispersal_of_three_colletotrichum_species_infecting_strawberry_ L2 - http://apsjournals.apsnet.org/doi/full/10.1094/PHYTO.1999.89.7.555?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -