56 BEAN CULTURE 



water. The addition of resin soap will add to the ef- 

 fectiveness of the mixture by making it spread more 

 evenly and it will be less easily washed off by rains. 

 Resin soap can be made by mixing 2 pounds of resin 

 and I pound of crystallized sal soda to 2 quarts of 

 water. These are boiled until a clear brown solu- 

 tion is obtained. This solution, added to one bar- 

 rel of Bordeaux, will be about the proper mixture. 

 In the large growing centers in New York, the 



FIG. 19 ASH-GRAY BLISTER BEETLE. 



growers are emphatic in pronouncing spraying an 

 important operation in the production of beans. 

 They also agreed that the addition of soap is impor- 

 tant. The first application should be made about the 

 time the third leaf is expanding or earlier if the dis- 

 ease appears to any considerable extent. Applica- 

 tions are repeated three or four times at intervals of 

 10 to 14 days or whenever the rains wash off the 

 Bordeaux. Commercial bean growers seldom have 



