398 



Report op the Horticulturist of the 



It was shown in the investigations of 1895 that the first treat- 

 ment should be made before the first of June, see p. 395. 



The effort to control the disease with two treatments would 

 probably have been more successful in 1895 had the first treat- 

 ment been given before June 1 instead of waiting until June 15. 



In trying to control the disease by two treatments in 1896, 

 see Series 2 and Series 4, it appears that on the whole this plan 

 is not as effective as where three treatments were given, yet ex- 

 cellent results were secured. In seasons when the general cou- 

 'dition of the foliage is as good as it was in. 1895 and 1896 it 

 would hardly pay to make three sprayings for the leaf-spot in 

 commercial orchards, but till the plan of making but two treat- 

 ments has stood the test of a season when the leaf -spot is unusu- 

 ally abundant, it is hardly safe to recommend it as sufficient for 

 all seasons. 



In view of the results of the investigations of 1895-6, the fol- 

 lowing line of treatment is confidently recommended instead of 

 that which was suggested on page 14 of Bulletin 98. 



Course of treatment recommended for plum leaf spot. — When but 

 two treatments are to be made during the season, let the first 

 be given about May 25, or about ten days after the trees have 



