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Light Measurements for Studying Sooty Mold Growth on Simulated Pecan Foliage

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Transactions of the ASAE. 23 (2): 0481-0484. (doi: 10.13031/2013.34607) @1980
Authors:   J. S. Smith, Jr., W. L. Tedders

ABSTRACT A system was designed and constructed for studying sooty mold growth on simulated pecan foliage. Monochromatic light intensity levels were measured through glass microscope slides with and without sooty mold accumulations on them. Measurements were made within the 400 to 700 nm waveband to cover the spectrum of primary photosynthesis. Weekly and seasonal ac-cumulations of sooty mold growth were determined. The cleansing effects of rainfall in removing sooty mold ac-cumulations were measured. At times foliage shading by sooty mold growth exceeded 50 percent. All wavelengths within a 15 nm wide waveband at the measured intervals were equally absorbed by sooty mold.

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