243 



All the stocks were sprayed on tlie same dates; in 1891 on May 21, 

 .Tune 3 and 24, July 9 and 24, and August 8 and 28. One-half the 

 stocks were treated seven times, on the dates just indicated, and one- 

 half only three times, on the first three dates named. In 1892 the dates 

 of treatment were May 26-27, June 15-16, June 23, July 6-7 and 21, 

 and August 5. One-half were sprayed five times, on the first five dates 

 mentioned, the other half six times as just indicated. The only fungi- 

 cides used were Bordeaux mixture and ammoniacal solution. In 1891 

 both preparations were of essentially standard strength, but in 1892 

 the Bordeaux mixture was reduced to the 60-gallon formula, as ex- 

 plained on a subsequent page (p. 262). 



FRENCH PEAR STOCKS. 



1891. Four rows (1,922 stocks), of which 1,462 were treated and 460 

 left untreated. One-half the treated stocks were sprayed with ammoni- 

 acal solution, the other half with Bordeaux, at the dates above indicated. 

 Although the disease was not so abundant in 1891 as in 1892, the con- 

 trast between treated and untreated was striking. Seven treatments 

 with Bordeaux proved efficacious, while neither three treatments with 

 Bordeaux nor seven with ammoniacal solution showed as good results, 

 and three treatments with ammoniacal solution were without apparent 

 effect. On October 9 a count of those stocks forced by the premature 

 fall of the foliage to put forth new leaves gave the following figures: 



TABLE 1. Showing number of French stocks forced to put out ueiv leaves. 



1892. The same rows of stocks as were employed in 1891 were treated 

 in 1892, but one-half of them had been budded the fall previous, as sub- 

 sequently described on pp. 258, 2G1. The other half was purposely left 

 unbudded to furnish a means of testing the fungicides. The treatments 

 were made on dates given above, using the formula mentioned on p. 

 202. During the course of the season little difference between treated 

 and untreated budded stocks was noticeable, as none but the Flemish 

 Beauty were subject to the disease. At the close of the season, how- 

 ever, the foliage on treated Flemish Beauty was much superior to that 

 on untreated. Bordeaux proved superior to ammoniacal solution and 

 entirely efficacious. 



The greatest contrast in the experiment was between the treated and 

 untreated stocks which had not been budded. The susceptibility of 

 these unbudded seedlings afforded an excellent opportunity to test the 



