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Pathological Histology. Make a comparative study of diseased and 
healthy areas in prepared cross-sections of the leaf. DETERMINE :— 
17. What pathologic changes, if any, in number, form and size 
of cells has resulted from the presence of the pathogene. 
18. What changes have taken place in the protoplasts of affected 
cells; nucleus, cytoplasm and chloroplasts. 
Make prawincs of diseased and healthy tissues to show the pathologic: 
effects. 
REPORT 
1. Detail a plan for controlling the hollyhock rust in border- 
plantings. Give satisfactory reasons for each step in the procedure. 
