| |
| DOI: | 10.1080/07060660909507572 |
|---|
| Web URL(s): | http://www.tandfonline.com/doi/pdf/10.1080/07060660909507572
Last checked: 01/09/2012
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Ma, B.;
Uddin, W.;
Olaya, G. |
|---|
| Author Affiliation: | Ma and Uddin: Department of Plant Pathology, The Pennsylvania State University, University Park, PA; Olaya: Syngenta Crop Protection, Vero Beach Research Center, Vero Beach, FL |
|---|
| Title: | Baseline and non-baseline sensitivity of Magnaporthe oryzae isolates from perennial ryegrass to azoxystrobin in the northeastern United States |
|---|
| Section: | Epidemiology
Other records with the "Epidemiology" Section
|
|---|
| Translated Section: | Épidémiologie |
|---|
| Source: | Canadian Journal of Plant Pathology. Vol. 31, No. 1, 2009, p. 57-64. |
|---|
| Publishing Information: | Canadian Phytopathological Society |
|---|
| # of Pages: | 8 |
|---|
| Related Web URL: | http://www.tandfonline.com/doi/abs/10.1080/07060660909507572
Last checked: 01/09/2012
Notes: Abstract only |
|---|
| Keywords: | TIC Keywords: Azoxystrobin; Disease control; Fungicide application; Fungicide combinations; Fungicide resistance; Geographical distribution; Gray leaf spot; Isolation technique; Lolium perenne; Pyricularia grisea; QoI fungicides; Temperatures
|
|---|
| Abstract/Contents: | "Gray leaf spot, caused by Magnaporthe oryzae, is chiefly managed by the application of fungicides. Among several systemic fungicides, azoxystrobin has been effectively used to control the disease; however, the development of resistance in M. oryzae to azoxystrobin has been reported in some regions of the United States. The sensitivity level to azoxystrobin of pathogen isolates from perennial ryegrass turf has not been documented in a comprehensive manner in the northeastern United States. This survey was conducted to evaluate the sensitivity to azoxystrobin of 135 isolates of M. oryzae collected between 1995 and 2004 from golf courses primarily in the northeastern United States. Media components, incubation time, and temperature were optimized for a modified in vitro spore germination assay to determine the sensitivity of the isolates. The EC50 value of 111 baseline isolates ranged from 0.001 to 0.083 μg/mL (mean 0.039 μg/mL) and 21 non-baseline isolates from Pennsylvania (PA) ranged from 0.007 to 0.066 μg/mL (mean 0.029 μg/mL). No significant difference in sensitivity (P <= 0.05) was observed between baseline and PA non-baseline isolates. DNA sequence analysis of the cytochrome b gene (CYTB) showed that no mutation had occurred among PA non-baseline isolates. The study established azoxystrobin baseline sensitivity for M. oryzae in the northeastern United States and indicated that because of limited use of QoI (quinone outside inhibitor) fungicides and the practice of using fungicide rotations and mixtures for gray leaf spot control, a shift in sensitivity to azoxystrobin has not yet occurred in the PA non-baseline isolates." |
|---|
| Language: | English |
|---|
| References: | 42 |
|---|
| Note: | Abstract also appears in French
Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ma, B., W. Uddin, and G. Olaya. 2009. Baseline and non-baseline sensitivity of Magnaporthe oryzae isolates from perennial ryegrass to azoxystrobin in the northeastern United States. Can. J. Plant Pathol. 31(1):p. 57-64. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=195747 |
| If there are problems with this record, send us feedback about record 195747. |
| Choices for finding the above item: |
|---|
| DOI: 10.1080/07060660909507572 |
| Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/07060660909507572
Last checked: 01/09/2012
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: b2189612 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
