AMERICAN GOOSEBERRY MILDEW. 



FIGS. 1 and 2. White or summer stage on young shoot and leaves. 

 FIG. 3. Summer stage on berries, passing gradually into the brown 



stage. 



J?IG. 4. Shoot showing brown felt of mycelium or winter stage. 

 FIG. 5. Portion of the same, magnified about four times, showing 



minute spore cases embedded in the felt of mycelium. 



451 



