246 



aud 6 treatments were more effective than 5. But one noteworthy ex- 

 ception existed in the first section treated 5 times with ammoniacal solu- 

 tion, which is possibly explainable by superiority of soil. 



Below are given in Table 4 the notes on foliage and caliper made Octo- 

 ber 19, 1892: 



TABLE 4. Showing condition of Japan stocks as regards foliage and caliper. 



* Designations in this column refer to the varieties of "buds," for details of which, see p. 261. 



It is noticeable from the above table that Bordeaux mixture afforded 

 the greatest immunity 5 also that the untreated unbudded stocks made 

 much less growth than those treated with Bordeaux. A reference to 

 the plan (p. 257) will show the situation of the row (No. IX). When it 

 is remembered that of all of the French stocks, those standing in row 

 VIII only 3J feet distant, made the best growth, the element of soil 

 difference is hardly to be considered as a disturbing factor. 



AMERICAN PEAR STOCKS. 



1891. Four rows containing 1,673 stocks were subjected to a course of 

 treatment similar in every respect to that given the French and Japan 

 stocks. Owing to the lateness of the season when application was made 

 to the growers of American seedlings only second-grade stocks were to 

 be obtained. Because of this unfortunate but unavoidable circum- 

 stance no comparison could be drawn as to the comparative value of 

 American, Japan, and imported French stocks. The results of the treat- 

 ments with fungicides while not as striking as with the French stocks,* 

 are valuable as adding testimony to the efficacy of the Bordeaux.* 

 Seven treatments with this mixture proved entirely efficacious, raising 

 the percentage of stocks wholly free from the disease from two tenths 

 of 1 per cent to 39 per cent. On October 9 a count was made of the 



*See Bull. No. 3 Div. Vcg. Path., p. 59. 



