Splash dispersal inColletotrichum graminicola (Ces.) Wilson, the causal organism of anthracnose of sorghum
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The conidia ofColletotrichum graminicola (Ces.) Wilson were dispersed only by rain drops. The dispersal was related to the frequency of rainfall. Under field conditions, conidia were dispersed vertically up to a height of 0·75 m and laterally up to a distance of 1 m from the source. Both incident water drops and flowing water liberated conidia from the sporulating lesions. Peak liberation of conidia occurred with the water drops 3–11, and most conidia were removed from the sporulating lesions within 60 s, suggesting dispersal of the pathogen even during small showers of rain.
KeywordsColletotrichum graminicola sorghum anthracnose epidemiology splash dispersal aerobiology
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