Distribution and Community Associations of Cape Ivy (Delairea odorata) in California

Robison, Ramona; DiTomaso, Joseph M.

doi:10.3120/0024-9637-57.2.85

Cited by 9 publications

(8 citation statements)

References 8 publications

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“…The stipulate variety is the most common variety reported in all collections of Cape-ivy in South Africa (Robison and DiTomaso, 2010). In contrast, the exstipulate variety is the most common variety in California (Robison and DiTomaso, 2010). Surveys showed that although the exstipulate variety was found throughout coastal California, it occurred more frequently at the northern and southern end of Cape-ivy's distribution range, while the stipulate variety was more common throughout the center of the distribution range of the species.…”

Section: Introductionmentioning

confidence: 83%

“…The stipulate variety has ear-like, flattened auricles at the base of the leaf petioles, whereas the exstipulate variety lacks auricles. The stipulate variety is the most common variety reported in all collections of Cape-ivy in South Africa (Robison and DiTomaso, 2010). In contrast, the exstipulate variety is the most common variety in California (Robison and DiTomaso, 2010).…”

Section: Introductionmentioning

confidence: 91%

“…It was introduced to the eastern United States (U.S.) in the 1850s and to California in the 1950s as an ornamental house plant (Bossard, 2000). The plant is now a serious pest throughout coastal California and southern Oregon (Robison and DiTomaso, 2010). Alvarez and Cushman (2002) showed that Cape-ivy reduced species diversity by 31%, abundance of native seedlings by 88%, and abundance of non native seedlings by 92% in riparian communities.…”

Section: Introductionmentioning

confidence: 99%

“…Surveys showed that although the exstipulate variety was found throughout coastal California, it occurred more frequently at the northern and southern end of Cape-ivy's distribution range, while the stipulate variety was more common throughout the center of the distribution range of the species. Relatively few populations were found where both varieties occurred together, and these were located in urbanized coastal areas (Robison and DiTomaso, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Alvarez and Cushman (2002) showed that Cape-ivy reduced species diversity by 31%, abundance of native seedlings by 88%, and abundance of non native seedlings by 92% in riparian communities. Cape-ivy is also invasive in parts of Europe, Australia, New Zealand, Hawaii, and South America (Robison and DiTomaso, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Pre-release efficacy assessment of the leaf-mining moth Digitivalva delaireae (Lepidoptera: Glyphipterigidae), a potential biological control agent for Cape-ivy, Delairea odorata (Asteraceae), in western North America

Reddy

Mehelis

2015

Biological Control

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pre-release efficacy assessment of the leaf-mining moth Digitivalva delaireae (Lepidoptera: Glyphipterigidae), a potential biological control agent for Cape-ivy, Delairea odorata (Asteraceae), in western North America

Reddy

Mehelis

2015

Biological Control

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Light intensity is a limiting factor to the inland expansion of Cape ivy (Delairea odorata)

et al. 2010

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Cape ivy (Delairea odorata) is a highly invasive climbing perennial vine that is primarily distributed in coastal communities of California and Oregon, with patchy infestations in some inland riparian areas. In this study, we evaluated light as a potential environmental limitation to the spread of Cape ivy into inland regions of the western United States. Cape ivy was collected from four locations representing the north to south range. Plants were grown for 9 to 11 weeks in full sunlight and under two shade regimes (20 and 6% of full sunlight). The experiment was conducted twice at two temperature regimes. Results show some within-and among-population variability, with the southernmost San Diego County population having the highest biomass under the warmer growing conditions and the three northern populations responding most favorably in the cooler growing conditions. Despite the minor differences within and between populations, Cape ivy grew very poorly in full sunlight in both experiments. Although plants growing under 6% light grew better than those in full sunlight, they were far less robust compared to plants growing at 20% light. Our results indicate that while Cape ivy will not persist in areas with prolonged high intensity sunlight, characterized by much of the interior regions of California and Oregon, it is expected to invade and spread in areas with reduced light, including coastal regions frequently exposed to fog or cloudy conditions, or sub-canopy layers of riparian forests or woodlands. These communities should be the target areas for early detection and rapid response programs to prevent further Cape ivy invasion.

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Host plant water deficit stress impairs reproduction and development of the galling fly (Parafreutreta regalis), a biological control agent of Cape-ivy (Delairea odorata)

2021

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Distribution and Community Associations of Cape Ivy (Delairea odorata) in California

Cited by 9 publications

References 8 publications

Pre-release efficacy assessment of the leaf-mining moth Digitivalva delaireae (Lepidoptera: Glyphipterigidae), a potential biological control agent for Cape-ivy, Delairea odorata (Asteraceae), in western North America

Pre-release efficacy assessment of the leaf-mining moth Digitivalva delaireae (Lepidoptera: Glyphipterigidae), a potential biological control agent for Cape-ivy, Delairea odorata (Asteraceae), in western North America

Light intensity is a limiting factor to the inland expansion of Cape ivy (Delairea odorata)

Host plant water deficit stress impairs reproduction and development of the galling fly (Parafreutreta regalis), a biological control agent of Cape-ivy (Delairea odorata)

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