142 



GARDEN FOES. 



Warty Veins.— The ])iiiic'i]);il veins of the l)ack of 

 touuiio leaves arc soinetinies eoruseatLnl, like the example 

 figured. Such intumescences are, says the late Professor 

 Marshall Ward, "due to some disturbanee of the balance 

 of growth between transpiratory and assiniilatoi-y fum - 

 tions of their leaves," rather than disease or insets. 

 There is therefore no need to trouble about th "ni. 



[Pho'.o: H. A. i-mith. 

 TOMATO LEAVES WITH WARTY VEINS 



Yellow Spot Disease (Cladosi)orium fulvum).— 

 This fungoid disease is also known as the Tomato Leaf 

 ]-{ust. It first appears in the form of fsmall brownish isi)()tis 

 on the young leaflets, the spots increasing in size until 

 the whole or a part of the upper surface is covered. Later 

 on the spots change to a blackish-brown hue, and the 

 leaves shrivel aiil rlie. On the under sides of Ihe infected 

 leaflets a thin gi'o\\th of a rusty-brox^n tint fornns. Then 

 the stems of some of the infected plants often show :stri})os 



