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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/2005jou163.pdf
Last checked: 09/29/2008
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| Publication Type:
| Refereed |
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| Author(s): | Burpee, L. L. |
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| Author Affiliation: | Department of Plant Pathology, University of Georgia, Griffin, Georgia |
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| Title: | Sensitivity of Colletotrichum Graminicola to phosphonate fungicides |
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| Section: | Diseases (plant pathology)
Other records with the "Diseases (plant pathology)" Section
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| Meeting Info.: | Llandudno, Wales, UK: July 10-15 2005 |
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| Source: | International Turfgrass Society Research Journal. Vol. 10, No. Part 1, 2005, p. 163-169. |
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| Publishing Information: | Aberystywth, Ceredigion, UK: International Turfgrass Society |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Colletotrichum graminicola; Anthracnose; Fungicides; Phosphonates; Diseases; Disease control; Chemical sensitivity
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| Abstract/Contents: | "Anthracnose, caused by Colletotrichum graminicola (Ces.) Wils., is a serious disease of creeping bentgrass (Agrostis stolonifera L.) and annual bluegrass (Poa annua L.) in the United States and Europe. Applications of phosphonate fungicides have provided variable control of anthracnose in field trials. The objective of this study was to relate this variability to possible differences in sensitivity of C. graminicola isolates to potassium phosphonate (PP) and fosetyl aluminium (FA). Sensitivity of isolate CG00-06 was assessed by measuring colony diameter on potato-dextrose agar (PDA) amended with PP (Alude 5.7L, Cleary Chemical Corp., Dayton, NJ) or FA (Aliette 80 WP or Chipco Signature 80WP, Bayer Crop Science, Kansas City, MO). Six concentrations of PP ranging from 30 to 170 mg a.i. ml-1 and six concentrations of each formulation of FA ranging from 160 to 178 mg a.i. ml-1 wer prepared. Significant linear relations were detected between percent growth inhibition of CG00-06 and concentration of each fungicide ested. Concentrations providing 50% inhibition (EC50) for PP and FA (Aliette 80WP) were 121.9 and 364.6 mg ml-1, respectively. A higher EC50 (401.7 mg ml-1) was detected for the Chipco Signature formulation of FA. Phosphonate sensitivities of eleven additional isolates of C. graminicola were compared on PDA amended with PP and FA (Aliette 80WP) at 125 and 400 mg ml-1. Significant differences in relative growth occurred among isolates exposed at each fungicide. Relative growth of isolate CG00-06 was less than that of other C. graminicola isolates on media amended with PP and FA. When compared to single isolates of Rhizoctonia solani Kuhn, Sclerotinia homoeocarpa F.T. Bennett, Gaeumannnomyces graminis (Sacc.) Arx & D. Olivier var. graminis, and Pyricularia grisea (Cooke) Sacc., isolates of Pythium aphanidermatum (Eds.) Fitzp. and C. graminicola were the only fungi tested that exhibited significant reductions in relative growth when exposed to PP and FA at 0.64, 1.45, and 3.14 PO3 meq L-1." |
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| Language: | English |
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| References: | 28 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Burpee, L. L. 2005. Sensitivity of Colletotrichum Graminicola to phosphonate fungicides. Int. Turfgrass Soc. Res. J. 10(Part 1):p. 163-169. |
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https://archive.lib.msu.edu/tic/its/articles/2005jou163.pdf
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MSU catalog number: SB 433 .I52 v. 10 |
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