SK.VrAl.lTV AND A I.TKH \ ATH).\ OF (iKX K» ATIDN S 



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7EXT-FIG4 LFECyCLEOFPBRASSICAE. accohdihg to COOK AND 



sormPTZ. 1930 



TEXT-FIG 5 LIFE CYCLE OF P BRASSICAE. SUGGESTED BY- 

 COOK AND SCHWARTZ S STUDIES. 1930. 



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TEXT-FIG 6 LFE CrCLE OF TETRAMYXA. xcononc to 

 COOK. 1933 



TEXT-FIG 7 LIFE CYCLE OF SOROSPHAERA. /cccwing to 

 COOK. 1933. 



