182 Mortier F. Barrus 



experiment stations include spraying with bordeaux mixture in their 

 recommendations for control of bean anthracnose. In later years, instances 

 have occurred in which bordeaux was reported as not successful in 

 controlling the disease although the vines were well sprayed. 



Fairchild (1894), White (1906:95), Corbett (1907), and Whetzel (1908: 

 433) question the practicability of spraying beans generally, although 

 granting that there may be circumstances under which it could be recom- 

 mended. Whetzel has succeeded, however, in controlling the disease 

 on a few rows by thoroughly and properly applying the mixture with a 

 hand machine. He says that the field machines are not constructed so 

 that the mixture can be applied as thoroughly and effectively as by hand. 

 He believes that until a machine is put on the market capable of delivering 

 a spray that will cover the stems and the pods at any stage in the growth of 

 the plant, little or no results can be expected from spraying, and even then 

 the practice will be very expensive because of the machinery, chemicals, 

 and labor involved. Hollman (1915) sprayed plants grown from affected 

 seed with 1-per-cent bordeaux mixture without much success, but he 

 advises its use as a protective measure. Fischer (1919:249) tells of 

 Schander and Krause's experiments at Bromberg, where a 1- or 2-per- 

 cent soda-bordeaux and a 1- or 2-per-cent lime-bordeaux were used. 

 The soda-bordeaux killed the plants and the lime-bordeaux injured them, 

 at least when the solution contained just enough lime to neutralize the 

 copper sulfate solution. Later experiments with 1-per-cent bordeaux, 

 even when seed from healthy pods sorted from diseased plants was used, 

 reduced only slightly the number of affected pods and did not prevent 

 the disease from appearing on the leaves and stems. 



The writer conducted spraying experiments during the years 1908 and 

 1909 in large fields of canning beans at Oneida, New York, in cooperation 

 with the Burt Olney Canning Company, in small experimental plots at 

 Oneida during 1908, 1909, and 1910, and at Ithaca, New York, for six 

 years after 1910. The field sprayings were conducted on 200 acres or more 

 of beans. These were sprayed five times during the growing season, 

 at intervals of about ten days, the applications beginning when the plants 

 were just out of the ground and continuing until after picking had begun. 

 Bordeaux mixture (4-4-50) was used on part of each field and lime-sulfur 

 (1-50) on another part, the two sprayed areas being separated by fifteen 

 unsprayed rows. With the varieties of beans grown, Refugee Wax and 



