Abstract
The sensitivity of L maculans and L. biglobosa to fungicides commonly used on UK winter
oilseed rape was investigated in vitro. On medium containing flusilazole or tebuconazole, the radius of
mycelial growth of isolates was recorded, and the effective dose at which 50% of growth was inhibited
(ED50) determined. Isolates of L. maculans had lower ED50 values, and the range of L. maculans ED50
values was narrower for both flusilazole (ED50 0.27µg/ml, range 0.06-0.7µg/ml) and tebuconazole
(ED50 0.67µg/ml, range 0.4-0.94µg/ml) than for isolates of L. biglobosa (flusilazole ED50 0.34µg/ml, range 0.16-0.9µg/ml; tebuconazole ED50 1.45µg/ml, range 0.75-2.63µg/ml). The effects of fungicide
on pathogen populations were investigated in a winter oilseed rape experiment in 2002/2003. The early fungicide treatment apparently affected pathogen populations, since fewer L. biglobosa isolates were detected on basal and upper stems from early treated plots than on stems from untreated and late
treated plots.
oilseed rape was investigated in vitro. On medium containing flusilazole or tebuconazole, the radius of
mycelial growth of isolates was recorded, and the effective dose at which 50% of growth was inhibited
(ED50) determined. Isolates of L. maculans had lower ED50 values, and the range of L. maculans ED50
values was narrower for both flusilazole (ED50 0.27µg/ml, range 0.06-0.7µg/ml) and tebuconazole
(ED50 0.67µg/ml, range 0.4-0.94µg/ml) than for isolates of L. biglobosa (flusilazole ED50 0.34µg/ml, range 0.16-0.9µg/ml; tebuconazole ED50 1.45µg/ml, range 0.75-2.63µg/ml). The effects of fungicide
on pathogen populations were investigated in a winter oilseed rape experiment in 2002/2003. The early fungicide treatment apparently affected pathogen populations, since fewer L. biglobosa isolates were detected on basal and upper stems from early treated plots than on stems from untreated and late
treated plots.
| Original language | English |
|---|---|
| Title of host publication | International Organisation for Biological Control Bulletin |
| Editors | Birger Koopermanns, Neal Evans, Samantha Cook, Ingrid H. Williams |
| Place of Publication | UK |
| Publisher | International Organisation of Biological Control |
| Pages | 157-164 |
| Volume | 27 |
| Edition | 10 |
| ISBN (Print) | 92-9067-172-4 |
| Publication status | Published - 30 Mar 2004 |
| Event | IOBC-WPRS Working Group: Integrated Control in Oilseed Crops - Rothamsted, United Kingdom Duration: 30 Mar 2004 → 31 Mar 2004 |
Workshop
| Workshop | IOBC-WPRS Working Group: Integrated Control in Oilseed Crops |
|---|---|
| Country/Territory | United Kingdom |
| City | Rothamsted |
| Period | 30/03/04 → 31/03/04 |