University of Hertfordshire

By the same authors

Maturation of ascospores of A-group and B-group Leptosphaeria maculans (stem canker) on winter oilseed rape debris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

View graph of relations
Original languageEnglish
Title of host publicationProceedings Brighton Crop Protection Conference - Pests and Diseases
Place of PublicationFarnham
PublisherBritish Crop Protection Council
Number of pages4
ISBN (Print)1-901396-62-2
Publication statusPublished - 2002
EventBCPC International Conference on Pests and Diseases - Brighton
Duration: 18 Nov 200221 Nov 2002


ConferenceBCPC International Conference on Pests and Diseases


Ascospores of both A-group and B-group L. maculans matured faster at 15-20degreesC than at 5-10degreesC. At 5-10degreesC, maturation of B-group ascospores was slower than that of A-group ascospores but there was no difference at 15-20degreesC. A-group pseudothecia were mainly produced on the surface of stem bases and B-group pseudothecia were mainly produced under the epidermis of upper stems. At Rothamsted in 2000/2001 and 2001/2002, ascospores matured earlier on stem bases than on upper stems. Ascospores matured and were released earlier in 2001 than 2000 and were then released from autumn to spring. Seasonal differences in first maturation of ascospores were related to differences in summer rainfall. The first phoma leaf spotting appeared in untreated plots of winter oilseed rape 8-15 days after the first release of ascospores.

ID: 817067