The Relation of Bark Moisture to the Development of Canker Diseases Caused by Native, Facultative Parasites: Viii. Ascospore Infection of Hypoxylon Pruinatum (Klotzsch) Cke.

Bier, John E.; Rowat, Marian H.

doi:10.1139/b62-083

Cited by 17 publications

(3 citation statements)

References 4 publications

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“…(Bier, 1959), Fusarium on Liriodendron tulipifera (Parker, 1961; Dochinger & Seliskar, 1962), Fusarium solani on Acer saccharum (Bier, 1964; Skelly & Wood, 1966) and Nectria cinnabarina on Gleditsia triacanthos (Bedeker & Blanchette, 1983). They also particularly noted the proliferation (independently of wound inoculation) of the stem canker pathogens H. atropunctatum in mechanically girdled oak trees ( Quercus )(Bassett & Fenn, 1984) and H. mammatum in drying stem sections of aspen ( Populus tremuloides ) (Bier & Rowat, 1962; Anderson & French, 1972). Chapela & Boddy (1988) concluded that it might be possible to explain these observations in terms of latency, and urged further investigation.…”

Section: Discussionmentioning

confidence: 99%

Water stress and Sphaeropsissapinea as a latent pathogen of red pine seedlings

et al. 2001

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Summary• The role of water stress in the initiation of collar rot by Sphaeropsis sapinea in asymptomatically colonized Pinus resinosa seedlings is reported.• Mortality and frequency of identification of the pathogen was quantified for seedlings subjected to different water regimes or watering regime -fungicide (benomyl) combinations in glasshouse experiments.• In experiment 1, seedling mortality ranged from 8% of repeatedly watered seedlings to 50% of those in the driest regime; data analysis indicated a high probability that mortality was not independent of watering regime. Seedlings developed symptoms resembling those of Sphaeropsis collar rot, and S. sapinea was identified from living (42%) and dead (92%) seedlings. In experiment 2, mortality of repeatedly watered seedlings was low, irrespective of fungicide application. For nonwatered seedlings, however, mortality was greater among seedlings not treated with fungicide (61%) than among benomyl-treated seedlings (37%); data analysis indicated a high probability that mortality was not independent of fungicide treatment.• Sphaeropsis sapinea can act as a latent pathogen; physiological alteration, through water stress, can effect release from the quiescent condition to result in rapid disease development .

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Section: Discussionmentioning

confidence: 99%

Water stress and Sphaeropsissapinea as a latent pathogen of red pine seedlings

et al. 2001

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“…Wood and French (1965a) reported that cankers on the south side of trees enlarged and ascospores were ejected from perithecia during winter months in Minnesota. It was suggested that ascospore infection of aspen may occur during the dormant season when host bark turgor was low (Bier and Rowat, 1962b); however, this has not been demonstrated. Bier (1940) isolated the eight single ascospores from each of 2 asci and established 16 single ascospore cultures on nutrient agar.…”

Section: Role Of Spores In the Infection Processmentioning

confidence: 99%

“…The inhibitory effect of microorganisms from the bark and sapwood of healthy aspen on the growth of E. mammata was investigated by Bier and Rowat (1962b) who used these saprophytes to demonstrate biological control of disease development on inoculated cuttings Rowat, 1962a, 1963b). Bier (1965) concluded that susceptibility or resistance to infection is more related to microbiological factors of the living bark than to chemical inhibitors.…”

Section: Host Defensementioning

confidence: 99%