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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/75/1/AJ0750010035
Last checked: 12/08/2016
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| Publication Type:
| Refereed |
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| Author(s): | Danneberger, T. K.;
Vargas, J. M. Jr.;
Rieke, P. E.;
Street, J. R. |
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| Author Affiliation: | Danneberger: Graduate Research Assistant; Vargas: Professor, Department of Botany and Plant Pathology and the Pesticide Reseach Center; Rieke: Professor, Department of Crop and Soil Sciences, Michigan State University, East Lansing, Michigan; Street: Assistant Professor, Department of Agronomy, Ohio State University, Columbus, Ohio |
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| Title: | Anthracnose development on annual bluegrass in response to nitrogen carriers and fungicide application |
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| Source: | Agronomy Journal. Vol. 75, No. 1, January/February 1983, p. 35-38. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Anthracnose; Poa annua; Nitrogen fertilizers; Fungicide application; Colletotrichum graminicola; Disease control; Cultural methods; Application rates; Application timing; Disease development
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| Abstract/Contents: | "Anthracnose caused by Colletotrichum graminicola (Ces.) Wils., is a serious disease of annual bluegrass (Poa annua L.) turf. In the northern and pacific-northwestern United States, annual bluegrass is the predominant golf course turfgrass and in some instances the main turfgrass species of home lawns. In turf, cultural practices are effective ways of controlling many turfgrass diseases. However, no reports are available on cultural practices that may reduce or control anthracnose development on annual bluegrass. The purpose of this study was to look at one cultural practice, N fertilization, along with fungicide treatments for controlling anthracnose. A field study was initiated in November of 1979. Three N carriers (isobutylidene diurea, sulfur-coated urea, and urea), applied at two rates (1.46 kg N/are/year and 2.92 kg N/are/year) and two timings spring (April initiation) and summer (June initiation), with or without fungicide treatments were evaluated for anthracnose control. Triademefon [1-(4-Chlorophenoxy)-3,3-dimethyl-l-(1-1,2,4-triazol-1-y1)- 2-butane] fungicide treatments provided the most effective management of anthracnose. Fungicide treated plots averaged 1.9 and 1.7% infected area for 1980 and 1981 whereas non-fungicide treated plots were 29.6 and 30.6% infected, respectively. Type of N carrier, whether isobutylidene diurea (IBDU), sulfur-coated urea (SCU) or urea, had no effect on anthracnose development. Moderate N levels (1.46 kg/are/year) were associated with less disease incidence than the higher level of N (2.92 kg/are/year). Nitrogen applications during the months of June, July, August, September, and November resulted in less disease than N applied in April, May, June, August, and September. Growth chamber inoculation studies showed the number of acervuli formed decreased with increasing N at 22 C. At 32 C, the number of acervuli decreased with increasing N to 0.90 kg/ ure but increased at the 1.80 kg/are N rate. In conclusion, N fertilization program of applying moderate levels of N (1.46 kg/are/year) with applications beginning in June followed with applications in July, August, September, and November at 0.24, 0.24, 0.24, 0.24, and 0.48 kg N/are, respectively, resulted in less anthracnose damage than the higher level of N (2.92 kg/are/year) or the alternate application schedule (April, May, June, August, September). If the N program was combined with fungicide applications, anthracnose was effectively controlled." |
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| Language: | English |
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| References: | 14 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Danneberger, T. K., J. M. Jr. Vargas, P. E. Rieke, and J. R. Street. 1983. Anthracnose development on annual bluegrass in response to nitrogen carriers and fungicide application. Agron. J. 75(1):p. 35-38. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/75/1/AJ0750010035
Last checked: 12/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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