| Autor: |
R. L. Hill, W. G. Lee, A. H. Gourlay, J. B. Wilson |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
Proceedings of the New Zealand Plant Protection Conference. 49:114-118 |
| ISSN: |
1172-0719 |
| DOI: |
10.30843/nzpp.1996.49.11440 |
| Popis: |
The rate and pattern of seed dispersal of Ulex europaeus were studied under 10 isolated 6-year-old plants in Canterbury over two years. To determine the impact of the introduced seed-feeding weevil Apion ulicis, half of the gorse plants were treated with insecticide in the second year. Seedfall and seed density were greatest at the canopy edge (39.4% of the seed recorded fell within the canopy at a density of up to 2120 seeds/ m 2 in the first year). Very few seeds were collected at 2.4 - 2.5 m from the centre of the bush. The seed-feeding weevil significantly reduced the number of seeds shed per bush to 45% of that shed by uninfected bushes, but this had no consistent effect on the spatial pattern of seed dispersal at the site. Results suggest that clearing 1.5 m tall gorse to within approximately 5 m of boundaries should effectively prevent explosive spread of gorse seed to adjoining areas. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
