Infection of Austrian and Ponderosa Pines by Dothistroma pini in Eastern Nebraska

Peterson, Glenn

doi:10.1094/phyto-63-1060

Cited by 41 publications

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“…But also a small amount of rain is enough for a successful infection progress (Gadgil, 1974). However the incidence of infection is highly sensitive to the annual variation in weather (Peterson, 1973).…”

Section: Introductionmentioning

confidence: 99%

Dothistroma septosporum: spore production and weather conditions

2012

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Dothistroma septosporum, the causal agent of Dothistroma needle blight is a widespread fungus which infects more than 80 species of coniferous trees through the entire world. Spreading of the infection is strongly affected by climatic factors of each locality where it is recorded. We attempt to describe the concrete limiting climatic factors necessary for the releasing of conidia of D. septosporum and to find out the timing of its spore production within the year. For this purpose we used an automatic volumetric spore trap and an automatic meteorological station. We found that a minimum daily average temperature of 10 °C was necessary for any spore production, as well as a long period of high air humidity. The values obtained in the present study were a little bit higher than those previously published, which may arise questions about a possible changing trend of the behaviour in the development of the Dothistroma needle blight causal agent. We used autoregressive integrated moving average (ARIMA) models to predict the spore counts on the base of previous values of spore counts and dew point. For a locality from Hackerovka, the best ARIMA model was 1,0,0; and for a locality from Lanzhot, the best was 3,1,0.Key words: Red band needle blight; Dothistroma needle blight; automatic volumetric spore trap; spore production; climatic conditions. Resumen Dothistroma septosporum: producción de esporas y condiciones climáticasEl Dothistroma septosporum, el agente causal del tizón Dothistroma de las acículas, es un hongo ampliamente distribuido que infecta más de 80 especies de coníferas en el mundo. La propagación de la infección está fuertemente afectada por factores climáticos de cada localidad donde se registra. Tratamos de describir los factores limitantes necesarios para la liberación de los conidios de D. septosporum y averiguar el momento de la producción de esporas en el año. Para este fin se utilizó una trampa de esporas volumétrica y una estación meteorológica automáticas. Se ha encontrado que fue necesaria una temperatura media mínima diaria de 10 °C para cualquier producción de esporas, así como un largo período de alta humedad del aire. Los valores obtenidos en el presente estudio fueron un poco más altos que los publicados anteriormente, que pueden surgerir preguntas acerca de una posible tendencia cambiante de la conducta en el desarrollo del agente causal del tizón Dothistroma de las acículas. Se utilizaron modelos autorregresivos integrados media móvil (ARIMA) para predecir los conteos de esporas sobre la base de los valores anteriores de los recuentos de esporas y del punto de rocío. Para una localidad de Hackerovka, el mejor modelo ARIMA es 1.0.0 y para una localidad de Lanzhot, el mejor fue 3.1.0.Palabras clave: tizón rojo de acículas; tizón Dothistroma de aciculas; trampa de esporas volumétrico automático; producción de esporas; condiciones climáticas.

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Section: Introductionmentioning

confidence: 99%

Dothistroma septosporum: spore production and weather conditions

2012

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“…A period of 10 hours or more of needle wetness is usually required for successful infection, and long dry periods after infection generally lead to less severity and slow development of stromata (Bulman 1993;Bradshaw 2004). One or more germ tubes emerge from a germinating spore, though whether their direction of growth is targeted or random is conflicting in the literature (Peterson 1966, cited in Gadgil 1967Gadgil 1967;Muir and Cobb 2005). Germ tube growth may follow water gradients from spores to stomata .…”

Section: The Pathogenmentioning

confidence: 99%

The role of weather and topography in the development of Dothistroma septosporum.

Braun¹

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“…It is also speculated that ascospores are wind or mist dispersed (Gibson 1974, Bradshaw 2004. Peterson (1973) noticed in his study that more conidia were collected in the months of June, July and August than in September in 1966 and high numbers were trapped in June and July, with considerably fewer trapped in August and September in 1967. He found that though there was significant rainfall, conidia were not collected in October in either year and based on the observed dates suggested the best periods for fungicide application.…”

Section: Spore Dispersal By D Septosporummentioning

confidence: 97%

“…They are dispersed by water splash, the dispersal distance normally being quite short (< 2 m) (Bulman et al, 2004). Peterson (1973) found that the range of dispersal of conidia of Dothistroma was limited.…”

Section: Spore Dispersal By D Septosporummentioning

confidence: 99%

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Spore dispersal and infection of lodgepole pine by Dothistroma septosporum in northwest British Columbia.

Boateng¹

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Infection of Austrian and Ponderosa Pines by Dothistroma pini in Eastern Nebraska

Cited by 41 publications

References 0 publications

Dothistroma septosporum: spore production and weather conditions

Dothistroma septosporum: spore production and weather conditions

The role of weather and topography in the development of Dothistroma septosporum.

Spore dispersal and infection of lodgepole pine by Dothistroma septosporum in northwest British Columbia.

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