Bean Anthracnose 



191 



for the other three, the change to bordeaux being made because of the 

 injury resulting to the vines from the use of Pyrox; three hills, in fact, 

 were killed, and the others on July 15 looked very straggling from the loss 

 of their lower leaves, so that they presented a much less satisfactory 

 appearance than the unsprayed rows, even though they were but little 

 affected with anthracnose. The results of this experiment are given in 

 table 13: 



TABLE 13. Yield of Davis Wax Beans, Number and Percentage of Pods Affected 

 with Anthracnose, and Weight of Good and of Cull Seeds, from Sprayed and from 

 Unsprated Rows in 1915 



Seed 

 planted 



Sprayed 



Not 

 sprayed 



Spotted seed 



Number of plants 



Number of pods 



Number of pods affected with anthracnose 



Per cent of pods affected 



Weight of good seed (grams) 



Weight of cull seed (grams) 



Number of plants 



Number of pods 



Number of pods affected with anthracnose 



Per cent of pods affected 



Weight of good seed (grams) 



Weight of cull seed (grams) 



Number of plants 



Number of pods 



Number of pods affected with anthracnose 



Per cent of pods affected 



Weight of good seed (grams) 



Weight of cull seed (grams) 



26 

 122 

 43 

 35 

 79 

 17 



30 



129 



129 



100 



10 



52 



Clean seed 



66 

 240 



22 



9 



290 



49 



86 

 521 

 521 

 100 



89 

 410 



Total 



92 



362 



65 



18 



369 



66 



116 

 650 

 650 

 100 

 99 

 462 



This experiment, although not conducted on an extended scale, shows 

 conclusively the control that can be obtained by spraying the plants 

 thoroughly with bordeaux mixture a sufficient number of times during 

 the season to protect them. 



Spraying was continued in 1916 on Davis Wax and Refugee Wax beans. 

 Two rows 40 feet long of each variety were planted on June 10; spotted 

 seed was used in one-third of each row, and healthy seed in the remainder. 

 No artificial inoculations were made. One row of each variety was left 



