Symptoms 



PERrwiNKLB. See Vinca. 



Phaseoltjs. See Bean, Dwarf, and Runner. 



Pine. 



Foliage and Shoots. — ^White cups, torn at the 

 mouth, filled with orange spores scattered on 

 foliage, those on young shoots larger, crowded 

 and with torn, spreading mouth. BUster rust 

 due to Coleosporium Senecionis, having its 

 alternate host on groundsel and on Cineraria 

 (q.v.). 



A somewhat similar rust on Pinus Strohus 

 (Weymouth Pine) (and attacking also other 

 pines with their needles in groups of fives) has 

 as its alternate host the black currant. It has 

 proved very destructive to the Weymouth Pine, 

 and where attempts are made to grow this 

 species the black currant should be exterminated. 

 Due to Cronartium ribicolum. 

 Plum. 



Root. — Crown gaU. See Apple. 



Stem. — Shoots bear small black fruits of the 

 fungus embedded ia the bark; later they die. 

 The wood is discoloured. Cut out and bum 

 all dead and dying shoots and branches. Due 

 to Cytospora sp. Also attacks cherries and 

 other kinds of fruit trees. 



Foliage. — Leaf becomes paUid and shiny 

 as though varnished. Upper skin easily 

 separates from leaf-tissues below it. Branch 

 91 



