PLANT-DISEASES. 55 



beets in storage. The fungus probably also lives upon the 

 leaves, making large circular spots. 



Preventives. notation of crops. Be careful to remove 

 all spotted leaves when storing the roots. 



Eemedy. For the fungus on the leaves spray with 

 Bordeaux mixture. 



RUST (Uromyces Betce, Pers.). Powdery reddish-brown 

 spots on the leaves of beets in California, often doing 

 much injury. 



Remedies. 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. CANE-RUST or ANTHRACNOSE. See under 



RASPBERRY. 



RED or ORANGE-RUST. See under RASPBERRY. 

 Buttonwood. LEAF-SCORCHING. See under PLANE-TREE. 

 Cabbage. CLUB-ROOT or CLUB-FOOT (Plasmidiophora 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. 



Eemedies. 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. 



