13 



RESULTS OF SPRAYING IN 1893. 



The fiiiit trees on the college grounds were sprayed at the regular 

 intervals during the season, using the copper sulphate solution before 

 the leaves unfolded, leaving some trees unspraytd for the sake of 

 comparison. The results of this work we give in as brief form as 

 possible. 



After the first spraying, as stated above, with the copper sulphate 

 solution, the dates of application were as follows : June 1st and 16th, 

 with Bordeaux mixture and Paris green; July 12th and Aug. 10th, 

 with the Bordeaux mixture alone. 



Results. 



As the season was unfavorable for its growth, little of the apple 

 scab appeared, but on a few R. I. Greenings it was foimd late in the 

 season. On the unsprayed trees about 50% of the fruit showed 

 some scabs, while that from the sprayed trees was not disfigured at 

 all. On the unsprayed trees, takiug an average of seven varieties, 

 nearly 50% of the fruit contained the larvae of the codling moth, 

 while on the sprayed trees only 10% wns affected. The yield of the 

 unsprayed trees averaged three bushels to the tree, while the s[)rayed 

 trees averaged from ten to twelve bushels. 



Owing to the extreme dryness of the month of June, no leaf blight 

 appeared on the leaves and no application of fungicides or insecti- 

 cides was made until it was discovered that the pear tree Psylla had 

 gained a foot-hold. The kerosene emulsion was applied July 4th 

 and llth, but it being too late in the season it had but little effect. At 

 least three applications of the kerosene emulsion should be made 

 from May 1st to June 1st, to be effectual. 



All the peach trees on the college grounds blossomed and set a 

 crop of fruit, and to protect it from the plum curculio the trees were 

 sprayed with the Bordeaux mixture and Paris green very soon after 



