50 



Green regarded as probably infested. Thirty-six of these trees 

 nearest the infested tree were sprayed by him with a 25 per cent, 

 emulsion December 4 — a fair day with a light breeze — tog"ether 

 with four other trees near by. February 18, 1902, this apple orchard 

 was found by Mr. Braucher uninjured and apparently free from 

 the scale, but two trees in an adjacent lot which had not been 

 sprayed were at this time slig-htly infested. 



No. 4. On Mr. Henry IIoiTmeister's place, near Quincy, H. O. 

 Woodworth found November 30, 1899, two apple-trees infested by 

 the San Jose scale, and in November, 1900, Mr. Green reported 

 three apple-trees badly infested and several peach-trees slig-htly so. 

 These apple-trees and a few of the peach-trees were taken out by 

 the owner and all the remainder were pruned by him preparatory 

 to the application of the spray. In Mr. Green's judgment, as ex- 

 pressed at the time, this pruning was too severe and not according 

 to his instructions, which he had illustrated by the sample pruning 

 of a single tree. An emulsion containing twenty-six per cent, of 

 kerosene was used on this place by Mr. Green December 17 to 19, 

 the weather of the first day being dull and that of the other two 

 days bright and fair. February 15, 1902, the trees on this place 

 were in good condition according to Mr. Braucher's report, except 

 for some apparent injury by the spray. It was said, however, by 

 the tenant in charge that some of the trees sprayed had died and 

 had been taken out. 



All the orchards on the two places just described were sprayed 

 with the same oil as that used on Mr. Klarner's place (No. 1), and 

 the general remarks made concerning that place apply also to these. 



Kerosene Emulsion. Season of 1901 02. 



The fact has already been mentioned that from November 25, 

 1901, to December 9 of the same year a soap emulsion containing 

 25 per cent, of kerosene was used by our spraying parties on every- 

 thing treated by them, and that from December 9 to February 5 it 

 was applied to all trees but peach and plum, these being treated 

 with the California wash. At the latter date its use was wholly 

 abandoned and whale-oil soap was substituted for it, this and the 

 California wash being the only insecticides applied during the re- 

 mainder of the season. 



The emulsion was used within this period on 6,536 trees at 14 

 different places in central and southern Illinois. The largest use 

 of it was made at Makanda and Carterville, where it was applied 

 to 1,975 and 1,770 trees respectively. August 15 and 16, 1902, Mr. 



