Susceptibility of Eucalyptus grandis and Acacia mearnsii seedlings to five Phytophthora species common in South African plantations

Bose, T. K.; Roux, Jolanda; Burgess, Treena I.; Shaw, Christopher; Wingfield, Michael J.

doi:10.1111/efp.12560

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…These results agree with those found by Bose et al (2019) who concluded that P. alticola was few aggressive when was inoculated in E. grandis . Regarding the low recoveries of these species in our pathogenicity trials (33%–66%), these results are consistent with those of Bose et al (2019) where P. alticola recovery rate was 30%.…”

Section: Discussionsupporting

confidence: 93%

“…Despite of this, no one of the inoculated seedlings died nor wilted, probably because they were frequently watered and did not suffer drought stress at any time. These results agree with those found by Bose et al (2019) who concluded that P. alticola was few aggressive when was inoculated in E. grandis . Regarding the low recoveries of these species in our pathogenicity trials (33%–66%), these results are consistent with those of Bose et al (2019) where P. alticola recovery rate was 30%.…”

Section: Discussionsupporting

confidence: 93%

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Phytophthora alticola and P. boodjera associated with decline of young Eucalyptus smithii trees in Uruguay

et al. 2023

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Since the approval of the last forestry law in 1987, commercial forestry activities in Uruguay had a great expansion. Planted surface currently reaches 1.053.693 hectares and covers 6.10% of the productive land area (MGAP-DIEA, 2021). Commercial forestry relies mostly on monocultural exotic tree plantations with Eucalyptus as the most widely planted genera (81%). Eucalyptus wood is mainly destined to cellulose pulp production, as round-wood and chips.Other destinations are solid wood for saw timber, panels and veneers production and wood for fuel (Boscana & Boragno, 2022).Until 2007, E. globulus was the most widely planted Eucalyptus species in Uruguay for pulp production, due to its several advantages in Kraft pulp manufacturing, including high pulp yields, high wood density, excellent fibre quality and desirable hand-sheet properties

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Phytophthora alticola and P. boodjera associated with decline of young Eucalyptus smithii trees in Uruguay

et al. 2023

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Phytophthora alticola and Phytophthora cinnamomi on Eucalyptus globulus in Portugal

et al. 2022

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Hybrid vigor in Eucalyptus increases resistance against Phytophthora root rot

et al. 2023

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Eucalyptus nitens is a cold-tolerant eucalypt that is native to Eastern Australia. Pure E. nitens as well as its hybrids, such as Eucalyptus grandis × Eucalyptus nitens, is propagated commercially in various regions of the southern hemisphere, including South Africa. In a plantation environment, E. nitens is susceptible to a variety of native and invasive pathogens, including Phytophthora alticola and P. cinnamomi. Recently, there have been increasing reports of root and collar rot in E. nitens in South Africa. The severity of this disease was substantially lower among interspecific hybrids of E. grandis × E. nitens compared to purebred E. nitens. In South Africa, the susceptibility of commercially propagated provenances of pure E. nitens and varieties of hybrid E. grandis × E. nitens to Phytophthora species is unknown. Therefore, we conducted greenhouse trials to evaluate the pathogenicity of P. alticola and P. cinnamomi to two families of pure E. nitens, one self-fertilized and the other outcrossed, as well as a single clonal variety of the most widely planted interspecific hybrid, E. grandis × E. nitens. The outcomes from these trials revealed that both self-fertilized and outcrossed families of E. nitens were highly susceptible to the tested Phytophthora species. The severity of root rot was greatest among plants inoculated with P. cinnamomi. The tested interspecific hybrid was tolerant to both Phytophthora species and developed new lateral and fine roots to offset the effects of root rot.

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Susceptibility of Eucalyptus grandis and Acacia mearnsii seedlings to five Phytophthora species common in South African plantations

Cited by 5 publications

References 21 publications

Phytophthora alticola and P. boodjera associated with decline of young Eucalyptus smithii trees in Uruguay

Phytophthora alticola and P. boodjera associated with decline of young Eucalyptus smithii trees in Uruguay

Phytophthora alticola and Phytophthora cinnamomi on Eucalyptus globulus in Portugal

Hybrid vigor in Eucalyptus increases resistance against Phytophthora root rot

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