Fungicidal Control of Shoot Blight Caused by<i>Sphaeropsis sapinea</i>on Red Pine Nursery Seedlings

Palmer, Marguerita A.; Nicholls, Thomas H.; Croghan, Catherine F.

doi:10.1094/pd-70-194

Cited by 10 publications

(11 citation statements)

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“…For example, Palmer and Nicholls (1985) reported losses of approximately 16% of 2‐ and 3‐year‐old seedlings at the Wilson Nursery in 1982. In non‐treated control plots of fungicide trials at the same nursery ( Palmer et al. 1986), approximately 42% of seedlings were diseased in 1982 and 1983, and approximately 74% in 1981.…”

Section: Discussionmentioning

confidence: 99%

“…But in the current surveys, frequencies of symptomatic seedlings in beds that had been treated with benomyl near windbreaks in Griffith, Hayward, and Wilson nurseries (21, 26 and 43%, respectively) far exceed those reported for benomyl‐treated seedlings in past fungicide trials. Palmer et al. (1986) reported incidence of only 2.7% when seedlings were treated with benomyl each of 2 years of growth at the Wilson Nursery.…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Application of fungicides in spring and early summer when expanding shoots are susceptible can reduce incidence of Sphaeropsis shoot blight on red pine seedlings (Palmer et al 1986;Stanosz and Smith 1996). Fungicide use in spring and early summer during the production of the seedlings sampled for these surveys differed among nurseries.…”

Section: Introductionmentioning

confidence: 99%

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Surveys for asymptomatic persistence of Sphaeropsis sapinea on or in stems of red pine seedlings from seven Great Lakes region nurseries

Stanosz¹,

Smith²,

Albers

2005

Forest Pathology

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The fungus Sphaeropsis sapinea persists on or in stems of asymptomatic red pine (Pinus resinosa) nursery seedlings, and proliferates to cause collar rot and mortality after planting. In the spring of 2002, seven nurseries were surveyed to determine the potential range in frequency of asymptomatic persistence: three operated by Wisconsin Department of Natural Resources (DNR), two by Minnesota DNR, one by Michigan DNR, and one by USDA Forest Service (in Michigan). At each nursery five groups of 20 asymptomatic red pine seedlings were collected near an inoculum source (red pine windbreak), if present, and five groups of 20 asymptomatic seedlings were collected away from such a source (1400 seedlings total). A segment of the lower stem/root collar from each seedling was surface disinfested and incubated on tannic acid agar. Transfers were made from resulting colonies and the pathogen identified from pycnidia and conidia produced in culture. The pathogen was identified from asymptomatic seedlings collected in all Wisconsin and Minnesota nurseries, but was never detected from seedlings from the Michigan DNR or USDA Forest Service nurseries. Frequencies of detection were greater (as high as 88%) from asymptomatic seedlings near red pine windbreaks including diseased trees than from seedlings distant from such windbreaks. A subset of isolates from asymptomatic seedlings was characterized using inter-simple sequence repeat-polymerase chain reaction analysis. Most isolates were the A group of S. sapinea, but B group isolates (recently named Diplodia scrobiculata) were also obtained from one nursery. One Minnesota nursery was more extensively sampled in 2003, with 17-44 groups of five asymptomatic red pine seedlings collected in four separate fields (525 seedlings total). The mean frequency of detection of the pathogen in these four fields ranged from 40 to 71%. Persistence of S. sapinea on or in asymptomatic seedlings continues to be problematic, not only because of the potential for subsequent seedling mortality, but also as a means by which a pathogen may be widely distributed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surveys for asymptomatic persistence of Sphaeropsis sapinea on or in stems of red pine seedlings from seven Great Lakes region nurseries

Stanosz¹,

Smith²,

Albers

2005

Forest Pathology

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“…The pathogen previously has also been reported from Africa, North America, Europe, Australia and New Zealand, in central North Island of New Zealand on young radiata pine (Minko and Mark, 1973;Chou, 1974), from south Africa on P. elliottii and P. taeda trees (Wingfield and Knox-Davies, 1980,) from Netherlands in 1982 (Dam et al, 1984) and again in 1985 (Kam and Van Dam, 1987) on Pinus nigra and P. sylvestris, from Black Hills of South Dakota on ponderosa pine (Johnson et al,1985), from north-central United States on P. resinosa seedlings (Palmer et al, 1986), from USA Peterson (1977), on both pine plantation and nurseries, from South Africa on pine plantation (Zwolinski et al, 1990), from United States in 1976 on Pinus resinosa (Nicholls and Ostry, 1990), from England on nursery seedlings and South Africa on pine trees (Swart and Wingfield, 1991), from Israel on Aleppo pine (Madar et al, 1996), from NW Tunisia in the region of Djebel Khroufa near Tabarka, and in the reserve of Aïn Zena near Aïn Draham, respectively on P. pinaster and P. radiata (Linaldeddu et al,2008), from Alabama, Louisiana, and Mississippi on Loblolly pine (Pinus taeda) (Stanosz et al, 2009). Perusal of literature reveals that there is no report of D. pinea from Pinus wallichiana though the fungus has been reported on other Pine species.…”

Section: Resultsmentioning

confidence: 99%

First Report of Diplodia pinea [(Desmaz.) J. Kick x fil] on Blue pine (Pinus wallichiana Jackson) from Asia

Bhat¹,

Beig²,

Dar³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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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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Fungicidal Control of Shoot Blight Caused bySphaeropsis sapineaon Red Pine Nursery Seedlings

Cited by 10 publications

References 0 publications

Surveys for asymptomatic persistence of Sphaeropsis sapinea on or in stems of red pine seedlings from seven Great Lakes region nurseries

Surveys for asymptomatic persistence of Sphaeropsis sapinea on or in stems of red pine seedlings from seven Great Lakes region nurseries

First Report of Diplodia pinea [(Desmaz.) J. Kick x fil] on Blue pine (Pinus wallichiana Jackson) from Asia

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

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