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- W2313996743 abstract "SUMMARY In 1998, procumbent pearlwort Sagina procumbens a non-native and invasive plant was discovered on Gough Island (Tristan da Cunha). Efforts to eradica te this species have been underway since 2000. To date it has been restricted to a small (400 m lengt h; approximately 1.2-1.6 ha area) but complex stret ch of coastal cliffs. Measures of seed density, based on germination trials of soil samples collected fro m Sagina infested areas, indicate that “standard eradicatio n” methods (digging up individual plants, heattreating soil and spot-treatment with herbicides) i n place over the last 10 years have resulted in a t hree orders of magnitude reduction in the seed load. How ever, around 200 seedlings per m 2 continue to be recorded due to germination from seeds within the s oil. In 2008-09 we investigated the effectiveness o f three methods designed to eradicate Sagina on Gough: “standard eradication” based on methods used in previous years ( n = 5 plots); monthly “herbicide treatment” across t he whole plot ( n = 4 plots); and “soil stripping” where all plants and soil was remo ved down to bedrock ( n = 2 plots). Sagina plants remained present within the standard eradication pl ots, with an average of 64 ± 79 (range 6 - 200) plants recorded per plot cleared in 8-months of mon itoring. No Sagina plants were found in herbicide treated plots, although this method is unlikely to tackle the problem of dormant seeds remaining withi n the soil. Soil stripping was effective at removing the seed bank and only five and 33 plants were foun d over the 8-months monitoring period. We recommend that a combination of monthly herbicide spraying across the whole infested area (to prevent plants maturing and setting seed) and a programme of soil stripping (working from the outer edge of t he plants range) to remove the seed bank, be utilis ed in order to provide a potential method to eradicate Sagina from Gough." @default.
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- W2313996743 date "2010-01-01" @default.
- W2313996743 modified "2023-09-27" @default.
- W2313996743 title "Strategies to eradicate the invasive plant procumbent pearlwort Sagina procumbens on Gough Island, Tristan da Cunha" @default.
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