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Fig. 3. Chart showing the seasonal duration of ascospore expulsion at West 
Chester, Pa. The vertical parallel lines indicate the approximate time when the 
traps were set. D following two parallel lines indicates the discontinuance of a 
trap. The figures below each month refer to the number of rain periods for the 
month, while the figures opposite each trap number represent the number of rain 
periods for the month following which there was an expulsion of ascospores. 
