PLANT-DISEASES. 55 



beets in storage. The fungus probably also lives upon the 

 leaves, making large circular spots. 



Preventives. — Kotation of crops. Be careful to remove 

 all spotted leaves when storing the roots. 



Bemedy. — For the fungus on the leaves spray with 

 Bordeaux mixture. 

 Rust (Uromijces Betce, Pers.). — Powdery reddish-brown 

 spots on the leaves of beets in California, often doing 

 much injury. 



Bemedies. — Bordeaux mixture. Burn the infested 

 leaves. 

 Scab {Oospora scabies, Thax.). — The fungus which causes 

 scabby patches ; also attacks potatoes. 



Preventive. — Do not grow beets where potatoes have 

 grown the preceding year or two. 

 Blackberry. Caxe-Rust or Anthracnose. — See under 

 Raspberry. 

 Red or Orange-Rust. — See under Raspberry. 

 Button-wood. Leaf-Scorching. — See under Plane-Tree. 

 Cabbage. Club-Root or Club-Foot {Plasmidiopliora Bras- 

 sicce, 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. It also attacks 

 the cauliflower, turnip, and allied plants, and radish, 

 shepherd' s-purse, and the common hedge mustard. 



Bemedies. — Burn the roots as soon as the disease 

 appears. Alternate crops. Keep down the weeds upon 

 which the disease breeds. It is thought that stable- 

 manures aggravate the disease. Lime put upon the land, 

 75 bushels to the acre, is thought to be a partial remedy. 

 Carnation. Anthracnose (Volutella sp.). — Attacks cut- 

 tings, and also stems near the joints, making dirty brown 

 depressed areas, marked with minute black pimples. 

 . Preventives. — Be careful to select only perfectly healthy 

 stock in propagation, — advice which also applies to other 

 carnation diseases. Keep the fungus off healthy stock by 

 spraying with Bordeaux mixture. 



