Mycocentrospora acerina in carrots; Effects of crop rotation on disease incidence |
| |
Authors: | ARNE HERMANSEN,TERJE AMUNDSEN,GUDMUND TAKSDAL,STEINAR DRAGLAND,GRY SYNNEVÅ G,MONS FLØ NES,LEIF SUNDHEIM |
| |
Affiliation: | The Norwegian Crop Research Institute (NCRI), Plant Protection Centre, Department of Plant Pathology, Fellesbygget, N-1432 As, Norway;NCRI, Saerheim Research Centre, N-4062 Klepp st, Norway;NCRI, Apelsvoll Research Centre, Division Kise, N-2350 Nes, Norway;NCRI, Apelsvoll Research Centre, Division Landvik, N-4890, Grimstad, Norway;NCRI, Kvithamar Research Centre, N-7500 Stjørdal, Norway |
| |
Abstract: | Four experimental sites located in different climatic regions in Norway were inoculated with Mycocentrospora acerina in 1985. In 1986, crop rotation experiments including carrot, barley, grass, red clover, onion and potato, were established at these sites. Incidence of M. acerina on the foliage and the roots of carrots after storage were recorded in 1989/90 and 1994/95. The 3 yr rotation only slightly reduced the inoculum of M. acerina in the soil. Red clover and grass were the most effective crops in reducing the inoculum, potato and barley were less effective, and onion had no effect on the inoculum. Differences in M. acerina infection on carrots between 3, 6 and 8 yr of rotation with barley and grass were not statistically significant. |
| |
Keywords: | Leaf infection liquorice rot root infection rotational crops soil type |
|
|