Bean Anthracnose 189 



The season was dry and anthracnose was not abundant, but the results 

 on plots 4, 6, and 7, the only ones having a considerable amount of anthrac- 

 nose in the checks, lead to the conclusion that the fungicides were effective 

 in the following order: bordeaux, Pyrox, lime-sulfur, with the latter falling 

 short somewhat. 



Spraying was continued during 1914 on Refugee Wax, Davis Wax, 

 Flageolet Wax, an unidentified wax, and Burpee's Stringless Green Pod. 

 Rows 50 feet long of each variety were planted on June 2, on plots situated 

 side by side on the same land that was used for this purpose in 1913 

 (table 11). The Flageolet Wax contained a large percentage of seed spotted 

 with anthracnose, but the seed of the other varieties included only a 

 small amount of spotted seed. The row of Flageolet Wax had many 

 missing hills. Applications of the fungicides were made on July 2, 15, 

 and 26, and August 9. One row of each variety was sprayed with bordeaux 

 (5-5-50), one row of each, except the unidentified wax, with Pyrox (1 pound 

 to 5 gallons of water), and one row of each except Flageolet Wax and 

 the unidentified wax with Sulfocide, a commercial sulfur solution (1 gallon 

 to 200 gallons of water). The remaining row of each variety was left 

 unsprayed as a check. 



In order to insure anthracnose infection, two inoculations with spores 

 of Colletotrichwn lindemuthianum obtained from cultures were made, 

 one on August 2 and the other on August 16. Favorable weather for 

 infection followed in each case, and the weather at Ithaca during the 

 summer continued favorable for the development of the pathogene. 

 All the varieties matured their pods before frost and a record of healthy 

 and spotted pods was made on October 8 (tables 11 and 12). 



This experiment shows that all the spray materials used had value in 

 the control of anthracnose and blight. The plants from spotted seed were 

 badly affected, and the control of the disease by spraying was not so 

 good on them as on plants from clean seed. 



In 1915 but one variety, Davis Wax, was used in the spraying experi- 

 ment. Two rows 50 feet long were planted on June 8, one to be sprayed 

 and one to be left as a check. One-third of each row was planted 

 with seed of this variety spotted with anthracnose, and the other two- 

 thirds with seed from selected clean pods. A thorough natural inoculation 

 took place, and so it was not necessary to inoculate artificially. The beans 



