236 Peas and Beans 



Bush string (snap) beans are sown in drills, the rows 

 being 18 to 30 in. apart to allow of easy tillage. The plants 

 should stand 4-8 In. in the row. Plant 1 or 2 in. deep. One 

 pint will sow from 75 to 125 ft. of drill, depending on the 

 variety. In drills, 1 bushel to 5 pecks are' sown to the acre. 

 One hundred bushels, more or less; Is a fair acre-yield of 

 string beans, and 200 bushels are frequently reported. The tall 

 or pole beans are usually grown in hills 3 or 4 ft. apart. 



Anthracnose (Colletotrichitm lindemnthianum) . — This dis- 

 ease may be recognized by the presence of black spots on the 

 stem, leaf-stalk and leaf-veins, and black sunken cankers on 

 the pods. Affected seeds show discolored areas on their sur- 

 face. Control: Clean seed obtained from disease-free plants 

 or pods should be used for planting. The Wells Red Kidney 

 and the White Imperial are resistant, and breeding work now 

 being conducted promises to yield other resistant types. Spray- 

 ing at intervals with 4-4-50 bordeaux mixture is sometimes 

 recommended, but it is of doubtful practicability except in 

 small garden planting. 



Bacteejal blight {Bacterium phaseoli). — Water-soaked to 

 brownish splotches on leaves and pods are characteristic. Af- 

 fected seeds may show yellowish discolored areas. Field and 

 garden varieties and lima beans are affected. Control: Seed 

 from disease-free plants should be chosen. The kidney type 

 among the field beans has proved to be very susceptible. 



Mosaic. — Alternate light and dark green areas and cupped 

 swellings on the young leaves especially are indicative of this 

 disease. No causal organism has been discovered. The disease 

 is carried over in the seed. Control: Seed from disease-free 

 fields should be planted. Marrow and Yellow-Bye beans are 

 nearly free from the disease. The Red Kidney is somewhat 

 resistant. The Michigan Robust pea-bean is a high-yielding 

 strain apparently unaffected by mosaic. Other pea-beans and 

 medium-beans become severely diseased. 



Dry Root-Rot (Fmarium sp.). — The fungus affects the stem 

 beneath the surface of the ground, causing a dry rot. Control: 

 Plant on land free from the organism and avoid the use of 



