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Micro‐meteorological studies of coffee berry disease A field investigation into the incidence of the physical conditions favourable for spore germination
Author(s) -
WOODHEAD T.
Publication year - 1968
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1968.tb05456.x
Subject(s) - berry , germination , twig , biology , microclimate , horticulture , insolation , conidium , spore , morning , incidence (geometry) , spore germination , agronomy , botany , ecology , climatology , mathematics , geometry , geology
SUMMARY In an investigation in a coffee plantation, the frequency and duration of the micro‐meteorological conditions necessary for the germination of conidia of Colletotrichum coffeanum were evaluated on coffee twigs of different ages, aspects and exposures. No consistent relationships between aspect and disease incidence were established, but there were indications that east‐facing branches might be slightly more disease‐prone than west‐facing ones because of more rapid warming of the surface water films by morning insolation. The macro‐climate of the plantation was measured by conventional meteorological instruments. Daytime air temperatures, measured inside a Stevenson screen between the rows of trees, were, on average, about 1 C° and 2·5 C° lower than those recorded on twig surfaces under wet and dry conditions, respectively.