Seed populations of Striga species in Nigeria
Seeds of Striga asiatica and S. hermonthica were separated from soil using a wet sieve method with a 2.5 smallcap˜M sucrose flotation solution and 250- and 150-µm mesh screens. In 34 fields, the av. and range of seeds/100 g of soil were 8.2 and 0-75, resp. Seeds were recovered from 28 of the 34 fields sampled. Eighteen, six and four fields had 1-5, 6-20, and >21 seeds/100 g of soil, resp. The max. number of seeds/100 g of soil was 202, collected from one sample site in a field. Emerged S. asiatica, S. gesnerioides, and S. hermonthica were present in 28 fields. The av. number of seeds/plant produced by S. gesnerioides was 6.4 × 104, and the av. number of seeds/capsule was 604. Seed recovery and plant emergence were correlated at one site.
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| Main Authors: | , |
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| Format: | Journal Article biblioteca |
| Language: | English |
| Published: |
1991
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| Subjects: | plants, striga gesnerioides, striga hermonthica, emergence, parasites, parasitic plants, sampling, seed banks (genetics), seeds, surveys, techniques, weeds, |
| Online Access: | https://hdl.handle.net/10568/101733 |
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| Summary: | Seeds of Striga asiatica and S. hermonthica were separated from soil using a wet sieve method with a 2.5 smallcap˜M sucrose flotation solution and 250- and 150-µm mesh screens. In 34 fields, the av. and range of seeds/100 g of soil were 8.2 and 0-75, resp. Seeds were recovered from 28 of the 34 fields sampled. Eighteen, six and four fields had 1-5, 6-20, and >21 seeds/100 g of soil, resp. The max. number of seeds/100 g of soil was 202, collected from one sample site in a field. Emerged S. asiatica, S. gesnerioides, and S. hermonthica were present in 28 fields. The av. number of seeds/plant produced by S. gesnerioides was 6.4 × 104, and the av. number of seeds/capsule was 604. Seed recovery and plant emergence were correlated at one site. |
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