INSECTS, DISEASES, REMEDIES 55 



through the field or by the hoe or cultivator. The 

 spores will germinate only in moisture so that in dry 

 weather infections would not be abundant even if 

 the spores were distributed. Thus, it is seen that 

 wet weather is responsible for the disease only in 

 that it affords the conditions most favorable for its 

 spread and development. 



Treatment for anthracnose must be preventive 

 rather than curative. The following are believed to 

 be the best means of controlling the trouble : Plant 



FIG. l8 WEEVIL-INFECTED SEED, SHOWING (b) AN 



EGG, GREATLY ENLARGED, AND (o) EGGS ON SEED. 



clean seed. If possible obtain seed from fields 

 known to be free from anthracnose. If seed from 

 diseased fields must be planted, it should be care- 

 fully hand sorted and all seeds not perfect and 

 bright should be rejected. While seed treatment 

 has not been generally regarded as effective, some 

 experiments at Cornell university gave profitable 

 results. The seed which was badly diseased was 

 soaked for 45 minutes in formalin of the strength of 

 I to 200. Finally spray thoroughly with Bordeaux 

 mixture. Use the normal strength which is 6 pounds 

 of vitriol, 4 pounds of lime, and 50 to 60 gallons of 



