Susceptibility of Commercial Boxwood Taxa to Cylindrocladium Buxicola©

Ganci, M.; Benson, D. M.; Ivors, Kelly

doi:10.17660/actahortic.2013.1014.83

Cited by 13 publications

(41 citation statements)

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“…sempervirens cultivars were very susceptible. These results are in agreement with the previous studies of Henricot et al, , Ehsen (), Ganci et al (), Gehesquière (), LaMondia and Shishkoff (). The inheritance of disease resistance is often complex, and probably even more complex for Buxus , as the B .…”

Section: Discussionsupporting

confidence: 94%

“…in this study are diploid, while B. microphylla and B. harlandii are tetraploid (Van Laere et al, 2011). The inheritance of traits in crosses involving polyploid species is known to be complicated due to more complex segregation, dosage effects (Guo et al, 2004) and potential non-Mendelian inheritance (Liu & Wendel, 2003;Osborn et al, 2003 (Ehsen, 2011;Ganci et al, 2013;Gehesquière, 2014;Henricot et al, 2008). The other species B. microphylla and B. harlandii demonstrate slower-growing lesions.…”

Section: Discussionmentioning

confidence: 70%

“…sempervirens (and most of its cultivars) show large, fast‐growing lesions upon infection with C . pseudonaviculata (Ehsen, ; Ganci et al, ; Gehesquière, ; Henricot et al, ). The other species B .…”

Section: Discussionmentioning

confidence: 99%

“…microphylla and B . harlandii (Ehsen, ; Ganci, Benson, & Ivors, ; Gehesquière, ; Guo, Olsen, Kramer, & Pooler, ; LaMondia & Shishkoff, ). Within B .…”

Section: Introductionunclassified

“…In vivo host susceptibility screenings demonstrate that in general, the B. sempervirens species are more susceptible to Calonectria than the Asiatic species B. microphylla and B. harlandii (Ehsen, 2011;Ganci, Benson, & Ivors, 2013;Gehesquière, 2014;Guo, Olsen, Kramer, & Pooler, 2016;LaMondia & Shishkoff, 2017). Within B. sempervirens, various degrees of susceptibility are also observed among different cultivars (Avenot, King, Edwards, Baudoin, & Hong, 2017).…”

mentioning

confidence: 99%

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Breeding and selection of Buxus for resistance to Calonectria pseudonaviculata

Laere

Heungens

Gehesquière

et al. 2019

Journal of Phytopathology

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Box blight is a widespread disease of Buxus caused by the pathogen Calonectria pseudonaviculata. It is responsible for significant losses in nurseries, gardens and wild boxwood populations. Our goal was to maximize the efficiency of a breeding programme towards increased disease resistance. The use of artificial inoculation of young F1 seedlings with C. pseudonaviculata spores under greenhouse conditions appeared to be a reliable tool for early selection of interesting prebreeding material. Overall, the four hybrid populations screened showed a segregating behaviour between their parents when determining the percentage of diseased leaves and lesion diameter. Genotypes were also found with an increased tolerance as compared to the parental species. Approximately 50% of the seedlings had the same score for both parameters after artificial inoculation in the greenhouse and in the field. Of the seedlings that showed severe symptoms in the greenhouse, <15% showed no disease symptoms in the field. Therefore, for larger breeding programmes, we propose a two‐step selection procedure: first artificial inoculation at seedling level to eliminate all genotypes with severe symptoms and then evaluation of the remaining seedlings in the field. Using this strategy, we were able to select several genotypes in our four hybrid populations with improved resistance to C. pseudonaviculata.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

“…microphylla and B . harlandii (Ehsen, ; Ganci, Benson, & Ivors, ; Gehesquière, ; Guo, Olsen, Kramer, & Pooler, ; LaMondia & Shishkoff, ). Within B .…”

Section: Introductionunclassified

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confidence: 99%

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Breeding and selection of Buxus for resistance to Calonectria pseudonaviculata

Laere

Heungens

Gehesquière

et al. 2019

Journal of Phytopathology

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Host susceptibility and microclimatic conditions influencing the development of blight diseases caused by Calonectria henricotiae

et al. 2020

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Effects of Inoculum Dose, Temperature, Cultivar, and Interrupted Leaf Wetness Period on Infection of Boxwood byCalonectria pseudonaviculata

Avenot

King²,

Edwards

et al. 2017

Plant Disease

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Boxwood blight is an emerging disease of great concern for the ornamental horticulture industry, historic garden managers, landscapers, and homeowners. Controlled-environment experiments were conducted to determine the effects of conidial concentration, temperature, interrupted leaf wetness period, cultivar, and leaf age on infection of boxwood leaves by Calonectria pseudonaviculata. Boxwood blight incidence (BBI) increased with increasing concentration up to 2.0 × 104 spores/ml. BBI also increased as temperature increased from 18 to 25°C, then declined gradually to zero at 29°C. Similar infection effects of inoculum concentration were observed in an experiment with four boxwood cultivars (‘Justin Brouwers’, ‘John Baldwin’, ‘Green Mound’, and ‘Nana’) of various degrees of susceptibility. The hypothesis that younger leaves are more susceptible than older leaves was supported for Justin Brouwers and Nana but not for Green Mound; and younger leaves of John Baldwin were less susceptible than older leaves. When inoculated plants (‘Suffruticosa’) were exposed to dry interruptions of 3 h or longer between 5 or 8 h of initial wetness and 12 h of additional wetness, these plants had significantly lower BBI compared with those exposed to continuous wetness for 20 h, and similar or at most slightly more infection than plants exposed to only the 5- or 8-h initial wetness. Continuous wetness durations beyond 20 h did not increase infection in these experiments. These results advanced our understanding of the environmental requirements of the infection process in boxwood blight development and they are essential for refining disease forecasting models.

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Susceptibility of Commercial Boxwood Taxa to Cylindrocladium Buxicola©

Cited by 13 publications

References 0 publications

Breeding and selection of Buxus for resistance to Calonectria pseudonaviculata

Breeding and selection of Buxus for resistance to Calonectria pseudonaviculata

Host susceptibility and microclimatic conditions influencing the development of blight diseases caused by Calonectria henricotiae

Effects of Inoculum Dose, Temperature, Cultivar, and Interrupted Leaf Wetness Period on Infection of Boxwood byCalonectria pseudonaviculata

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