46 



The Horticulturist's Rule- Book. 



Apple, continued. 



Scab (Fusicladium dentriticum, Fckl.). — Brown or blackish 

 scab-like spots on the leaves and fruit, arresting growth and 

 causing the parts to become distorted. Very common. 



Preventive or Remedy. — Spray with sulphate of copper while 

 the trees are dormant, if apple-scab is feared. Thereafter 

 spray with ammoniacal carbonate of copper. 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. Am- 

 moniated copper sulphate, applied as above, has also given 

 good results. 



Apricot. Leaf-Rust. — See under Plum. 



Balm of Gilead. Leaf-Rust. — See under Poplar. 



Bean. Axthracxose, or Pod-Rust (Glceosporium Lindemuthi- 

 anum. Sacc. and Magn.). — Reddish brown scab-like spots 

 appearing upon bean-pods, particularly upon the yellow- 

 podded string-beans. It also attacks watermelons. 

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

 Remedies. — Copper sprays. Sulphur and water. 



Bean, Lima. Blight (Phytophtlwra 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. Rust (Uromyces heta\ Pers.). — Powdery reddish brown 

 spots on the leaves of beets in California, often doing much 

 injury. 



Remedies. — Copper sprays. Burn the infested leaves. 

 Blackberry. Caxe-Rust or Axthracxose. — See under Rasp- 

 berry. 



Red or Orange-Rust. — See under Raspberry. 

 Buttonwood. Leaf-Scorchixg. See under Plane-tree. 

 Cabbage. Club-Root or Club-Foot (Plasmidiophora brassiere, 

 Woronin). — A contorted swelling of the root of the cabbage 

 in the field, preventing the plant from heading and causing 

 it to assume a sickly appearance. 



Remedies. — Burn the roots as soon as the disease appears. 

 Alternate crops. It is thought that stable-manures aggra- 

 vate the disease. 



