54 HORTICULTURIST'S RULE-BOOK. 



are dormant, if apple-scab is feared. Thereafter spray 

 with Bordeaux mixture. The first application of this 

 should be made as soon as the leaves appear and before the 

 blossoms open, and the second as soon as the blossoms fall. 

 Two or three subsequent sprayings may be necessary at 

 intervals of two or three weeks. Ammoniacal carbonate 

 of copper, applied as above, has also given good results. 



Apricot. LEAF-RUST. See under PLUM. 



Aster. LEAF-RUST (Coleosporium Sonchi-arvensis, L6v.). 

 Orange-colored spots or pimples on the leaves (chiefly 

 underneath) of China Asters, causing the foliage to shrivel 

 and die. 



Remedy. Spray with Bordeaux mixture or ammoniacal 

 carbonate of copper. 



Balm of Gilead. LEAF-RUST. See under POPLAR. 



Bean. ANTHRACNOSE, or POD-RUST (Colletotrichum Linde- 

 muthianum, Briosi and Cav.). Reddish-brown scab-like 

 spots appearing upon bean-pods, particularly upon the yel- 

 low-podded string-beans. It is said to attack the water- 

 melon, cucumber, and other cucurbits. The fungus 

 sometimes lies dormant in bean seeds and destroys the 

 plantlets. 



Preventive. Plant in dry and airy places, on light soil, 

 and avoid rotations with melons, cucumbers, etc. 



Remedies. Copper sprays, especially Bordeaux mixture. 

 Sulphur and water. 



Beui, Lima. BLIGHT (Phytophthora Phaseoli, Thaxter). 

 Attacks the pods in August and September, covering them 

 with a white, felted coating. It also attacks the young 

 shoots and leaves. 



Remedy. Bordeaux mixture. 



Beet. LEAF-SPOT (Cercospora beticola, Sacc.). The trouble 

 begins as light or ash-gray spots upon the leaves. Event- 

 ually the leaf becomes much cracked and torn. Common 

 in the eastern States. 



Remedies. Bordeaux mixture. Burn diseased leaves. 

 ROOT-ROT (Phyllosticta sp.). A coal-black dry rot of 



