Local dispersal and deposition of fungal spores from a wheat canopy
作者:
M.G. Eversmeyer,
C.L. Kramer,
期刊:
Grana
(Taylor Available online 1992)
卷期:
Volume 31,
issue 1
页码: 53-59
ISSN:0017-3134
年代: 1992
DOI:10.1080/00173139209427826
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Rotorod samplers 1,2, and 3 m above ground level and O, 10, and 30 m downwind of a wheat canopy were used to measure dispersal and deposition ofPuccinia reconditaandP. graminisurediniospores, andErysiphe graminisandCladosporiumconidia under various meteorological conditions. Spore concentrations at 1 m decreased by 1.8% m-1over a 30 m distance downwind at canopy height with wind speeds above 12 km h-1and 2.7% m-1in winds of less than 10 km/hr. Spore concentrations at 1 m were significantly higher at the edge of the canopy than at 10 m and 30 m downwind. However, this was not true at 2 and 3 m above the ground, indicating that the decrease was due to spore deposition rather than upward movement of the spores. During sampling periods with winds greater than 10 km-h-1, spore impaction was reduced near the source and increased with increasing distance. However, wind velocities < 8 km h-1resulted in increased impaction near the source and decreased deposition with distance downwind from the source.
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