49 



in the orchard were obscurely infested Mr. Green proceeded to 

 spray all the trees, *)*)7 in number, near enoug-h those infested to 

 endang-er them in the least. After pruning them carefully as a 

 means of securing a thorough distribution of the spray, he began 

 the treatment November 14 with an emulsion containing 2v^ per 

 cent, of kerosene. 



The weather was unusually variable, but not cold at any time. 

 The first day of the operation was cloudy and dull, and the second, 

 November 15, was sunny and bright. Nothing was done on the 

 16th, 17th, ISth, or 20th because of rains, and only a little on the 

 19th, which was a damp and misty day. Spraying was resumed 

 on the 2 1st and continued until the 2.^d, the first two of these 

 days being bright and the last one dull. 



There was nothing uncommon in this operation except that 

 the brand of oil, purchased in the local market, was different from 

 that ordinarily used by us elsewhere, and the emulsion was also a 

 little stronger than the usual 20 per cent. 



This orchard was inspected by Mr. Braucher between January 

 20 and February 17, l'M^2, that is fifteen months after treatment, 

 but by this time extensive changes had been made in it by the 

 owner, who had replaced many trees said to have been injured or 

 killed, and had dug out a part of a large block, planting the ground 

 to raspberries. In the part still standing 324 trees were either 

 wanting or had been replaced by others the preceding spring. Mr. 

 Klarner himself estimated his loss at 700 peach-trees. 



No. 2. On the premises of Wm. C. Burgdorf, near Ouincy, 

 were scattered plots of mixed fruit-trees, — pear, peach, cherry, and 

 apple, — among which Mr. Green found November 10, 190Q, trees 

 infested with the San Jose scale. Two small blocks of eighteen- 

 year old peach-trees, 196 in all, were grubbed out by the owner of 

 his own accord between November 12 and 21, and 248 fruit trees re- 

 maining were sprayed by Mr. Green with twenty-five per cent, kero- 

 sene emulsion November 30 and December 3. The weather was 

 bright, with little or no wind. February 18 and 1"), 1*)02, Mr. 

 Braucher found that the trees treated in this orchard were either 

 killed or injured, the peach having suffered worst. Injury to the 

 cherry is also especially mentioned. Four or five of these trees 

 had been grubbed out, and some others were nearly dead. The 

 San Jose scale was detected at this time on ten peach-trees, all 

 in one lot which had been sprayed by Mr. Green. 



No. 3. On the place of August Burgdorf, at (Juincy, was an 

 orchard of fifteen-year-old apple-trees which, because of its close 

 proximity to a badly infested tree belonging to a neighbor, Mr. 



