PLATE VIII. 
“ Witiiek-tip ” of Citron ( Phoma omnivora). 
Fig. 
1. Branches, leaves and fruit of Knight’s Citron, showing how the fungus 
destroys the bark, raptures the leaf, and gives rise to a brownish- 
black scab on the fruit (nat. size). 
2. Leaf from same tree, showing how the fungus disorganizes and destroys 
the tissues (nat. size). 
The effects of this fungus were very pronounced, since the vitality of the 
tree had been weakened by an attack of “ Collar rot,” while a hailstorm also 
caused some damage. 
