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- Title
Seed production and seed dormancy in wild radish (Raphanus raphanistrum L.) and some possibilities for improving control.
- Authors
Cheam, A. H.
- Abstract
Seed production and the dormancy status of wild radish (<em>Raphanus raphanistrum</em> L.) seeds from plants which emerged at different times of the growing season were investigated at South Perth, Western Australia. The relationship between seed dormancy breakdown and seedling emergence was also assessed at three locations. Seed production was highest from plants which emerged early. and there was a progressive reduction with later emergence. Plants from the earlier emergence also produced a higher proportion of dormant seeds. Dormancy was genetically controlled, with seeds from the southern location being more dormant than seeds from the north, and this relative order of dormancy was maintained over the summer and autumn months irrespective of soil surface cover. At the beginning of the growing season, the field-stored seeds developed induced dormancy. Subsequent burial of the seeds did not significantly increase the germinable seed pool. The total annual emergence from the optimum 1 cm depth in the first year amounted to only between 13·1 and 29·2% of the new season's seeds, depending on locality. However, shallow burial of the fresh seeds in early summer enhanced dormancy breakdown, The implications of the results for improving control programmes are discussed.
- Subjects
SEEDS; DORMANCY in plants; RADISHES; SEEDLINGS; CROPS
- Publication
Weed Research, 1986, Vol 26, Issue 6, p405
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1986.tb00724.x