70 horticulturist's rule-book. 



supposed to attack beets. Lime or ashes added to soil in 

 which scabby potatoes have been grown, increases the dis- 

 ease, probably by modifying the acidity of the soil. 



Preventives. — Do not plant upon land which has grown 

 scabby potatoes. Plant clean seed. Cook scabby potatoes 

 or beets before feeding them to stock to prevent dissemina- 

 tion of the fungus in the manure. Dig suspected tubers as 

 soon as the^y are ripe, to check the deepening of the scabs. 

 If scabby seed is planted, soak it in corrosive sublimate 

 (11 hours in 2 ounces sublimate to 16 gallons water), or 

 Bordeaux mixture. Corrosive sublimate is probably the 

 better remedy. Spraying the open furrows, before covering 

 the tubers, is also useful. 



Pumpkin. Powdery Mildew. — See under Muskmelon. 



Quince. Black-Rot (Sphceropsis 3Ialorinn, Peck). — A 

 trouble which usually appears at the blossom end of young 

 quinces, causing the fruit to perish with a black, dry rot. 

 Also attacks the apple and pear. 



Memedy. — Spray with Bordeaux mixture. 

 Blight. — See under Pear. 



Leaf-Blight and Fruit-Spot (Entomosporium maculatum, 

 Lev,). — Leaves become spotted and then turn yellow and 

 fall. The fruits also become spotted with sunken brownish 

 or black scab-like patches. This disease often causes con- 

 siderable damage. It is the same as the leaf-blight of the 

 pear, which see. 

 Rust. — See under Apple. 



Raspberry. Cane-Rust or Anthracnose (Glceosporium neca- 

 tor, E. & E.). — The spots or patches of fungus appear 

 on both the canes and leaves. The disease attacks the 

 base of the canes first and spreads upwards. It makes 

 sunken patches on the canes and causes the fruit to 

 dry up. 



Preventives. — Give plants an abundance of light and 

 air by broad planting and high training. In pruning out 

 the young shoots, select those which are the most diseased 

 and burn them. Frequent rotation — not fruiting the plan- 



