— 2o6 — 



That is to say these results indicate that 75.6 per cent, of the cher- 

 ries hable to injury were saved by the treatment with London purple. 



It will at once be noticed that the percentage of injury on the un- 

 sprayed trees (6. 17) was very small, being less than one-half that of last 

 year (14.15). This was probably due in part to the fact that the cher- 

 ries ripened nearly a week earlier this year, the horticulturist having 

 been picking for market June iith, while last year it was necessary to 

 wait until June 20th. Tlie ratio between the injury on ihe sprayed and 

 unsprayed trees, however, was nearly the same, the difference in the per- 

 centage of benefit for the two seasons being but .2 per cent. 



In the second experiment this year two young trees of an unknown 

 variety were used. They were situated on the south side of the orchard 

 of Early Richmond trees; but were somewhat isolated and much ex- 

 posed to curculio attack. The variety ripens considerabl\' later than the 

 Early Richmond and consequently like most late cherries it is much 

 more liable to injury. 



The trees were sprayed on the same dates as the others — May 15th, 

 2 1st and 25th, — and the fruit was examined June 14th. Neither tree 

 bore much over a thousand cherries, so that they were practically stripped 

 by the picking. 



The cherries on the sprayed tree showed ah injury of 22.6 per cent, 

 while those on the unsprayed tree had been injured to the extent of 57.7 

 per cent., giving a percentage of benefit of 60.5. 



I believe however, that better results would have been obtained had 

 I waited some days to make my first spraying, and made each of the 

 others later. A large proportion of the injuries on the sprayed tree had 

 been made but a short time before the examination, probably after the 

 last application of London purple had been washed off by the frequent 



rains. 



Experiments with Plums. 



The plum experiment was not an exact duplicate of the one made 

 last season because the main object this year was to discover some means 

 of preventing the injuries of the Plum Fruit Rot [AJonilia fi-uctigena). 

 Consequently a combination treatment was necessary. The trees ot a 

 half acre orchard containing four varieties were sprayed with London 

 purple alone, in the proportit)n of one ounce to ten gallons of water. 

 May I5ih, soon after the petals had fallen. They were next sprayed 

 Mav 24th, with a combination of London purple and the Bordeaux 

 mixture, which treatment was repeated June isl. 



No check trees were left in the orchard on account of the fruit rot 

 experiment, but two plum trees on the grounds a short distance from 

 the orchard were left untreated. The latter set a good crop of fruit but 



