Modeling Leaf Wetness in Relation to Plant Disease Epidemiology

Huber, Laurent; Gillespie, T. J.

doi:10.1146/annurev.py.30.090192.003005

Cited by 397 publications

(240 citation statements)

References 46 publications

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“…Apart from the ready availability of N as a nutrient source for microorganisms, enhanced periods with liquid water availability could lead to enhanced ion-exchange and leaching across the leaf surface (Tukey, 1970), and may also affect the deposition and reaction of ozone (Altimir et al, 2006). The more favourable conditions for micro-organism growth lead to increased risks of pathogen attack (Huber and Gillespie, 1992). Even in the absence of pathogenic activity, the proliferation of algae on a canopy that is well supplied with nitrogen and water may lead to situations where primary photosynthesis by the leaf is inhibited (Cape et al, 1989).…”

Section: Secondary Aerosol Particlesmentioning

confidence: 99%

Interactions of forests with secondary air pollutants: Some challenges for future research

Cape

2008

Environmental Pollution

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Section: Secondary Aerosol Particlesmentioning

confidence: 99%

Interactions of forests with secondary air pollutants: Some challenges for future research

Cape

2008

Environmental Pollution

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“…Moisture from dew has a role as a water source for plants and animals (Sharma, 1976), in the growth of fungal disease on crops (Huber and Gillespie, 1992), in harvesting practices (Newton and Riley, 1964), and there is potential for dew to be collected for human use, where other sources of fresh water are limited (Nikolayev et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Validation and results of a scale model of dew deposition in urban environments

Richards

Oke

2002

Intl Journal of Climatology

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There is growing interest in urban dew and its significance in questions of urban climate and air pollution deposition, but little research has been undertaken to study it. In this study, a generic, urban residential neighbourhood is modelled out-of-doors at a scale of 0.125, using three wooden houses (1.08 m tall), a concrete pavement (1.0 m in width), a grassed park (7.5 m in half-width) and several small trees (up to 1.5 m tall). The thermal inertia of each house is inflated, according to the internal thermal mass (ITM) approach, so that nocturnal surface temperatures are conserved. First-order validation was achieved through comparison with data collected at nearby full-scale sites in Vancouver, BC, Canada. Moisture accumulation (measured by blotting on grass and by lysimetry) is found to be primarily controlled by nocturnal weather conditions and the intrinsic nature of each substrate, e.g. dewfall is abundant on nights with few clouds and light winds, and on surfaces such as grass and asphalt-shingle roofs, which cool rapidly after sunset. However, these responses are modified by location effects related to the net radiation balance of the surface, which itself is strongly linked to site geometry as expressed by sky view factor and whether surfaces are isolated from heat sources. The dominant mechanism is argued to be the systematic increase in longwave radiation loss that is associated with increased sky view. Results agree with those observed at the full scale and suggest that maps of sky view factor, and knowledge of dew at an open site, can potentially be used to create maps of dew distribution in urban and other complex environments.

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“…In a study involving Gremmeniella balsamea (Laflamme, Smerlis 2012), leaf wetness was the factor best correlated with ascospore dispersal (Laflamme, Archambault 1990). Models to estimate leaf wetness have been developed, but a review on this topic reported several problems (Huber, Gillespie 1992).…”

Section: Discussionmentioning

confidence: 99%

Conditions conducive to an epidemic of Gremmeniella abietina, European race, in red pine plantations

Laflamme

Rioux

2015

J. For. Sci.

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ABSTRACT:In North America, Gremmeniella abietina, European race (GaEU), was reported in 1975. Our objective was to follow the spread of GaEU on red pines growing on flat land and on slope. Annual height infection varied significantly on flat land, ranging from 60 to 110 cm in 1991 to 0 to 50 cm in 1992. On the slope, pines in the bottom were killed by the disease, but survived on the top. Favorable conditions follow a horizontal line about 10 m over the lower elevation and are probably related to fog or mist. The horizontal disease spread over a 3-year period was only 20 m and this is mainly explained by the absence of ascospores in North America.

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Modeling Leaf Wetness in Relation to Plant Disease Epidemiology

Cited by 397 publications

References 46 publications

Interactions of forests with secondary air pollutants: Some challenges for future research

Interactions of forests with secondary air pollutants: Some challenges for future research

Validation and results of a scale model of dew deposition in urban environments

Conditions conducive to an epidemic of Gremmeniella abietina, European race, in red pine plantations

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