47 



the conclusion that trees were rarely cleared of the scale completely 

 by this insecticide spray, but that a sing^le treatment would serve as 

 an efficient protection for at least two years. In several of these 

 cases another insecticide treatment would be necessary by the end 

 of another year at the farthest. No injury to trees of any kind 

 was done by this twenty per cent, emulsion distributed at Rich- 

 view in January and February of this year. 



Experience at Cartervillc^ Albion^ and MonticcIIo, Spring of 

 igoo. — Begfinning- with March 5 and continuing- to March 17, 2,272 

 trees, belonging- to six owners, at Carterville were sprayed with a 

 twenty percent, emulsion with Mr. Green in charge. These trees 

 were of mixed kinds, mainly apple, but including also plum, pear, 

 and peach. Subsequent visits made in 1901 and 1902 showed that 

 no injury whatever was done to any of these trees. 



At Albion 674 trees were treated, mostly peach but with some 

 apple, plum, and pear, all receiving a twenty per cent, emulsion 

 between March 23 and 29. These trees were scattered in small 

 lots upon twenty-four town premises. This place was repeatedly 

 visited by inspectors and spraying parties up to the winter of 1902, 

 and no trace of injury by the kerosene treatment was discovered. 



Essentially the same statement may be made with respect to 

 Monticello, where 843 fruit trees of various kinds, including apple, 

 peach, and plum, were sprayed on twenty-two premises from April 

 10 to 19, no appreciable injury following. 



Experiment zvith Kerosene Emulsion at Barry. — The only 

 strict experiment with this spray made by us in the winter of 1901 

 was the last operation of the season — that in the apple orchard of 

 Belah Wright, at Barry, Pike county. Five hundred trees were 

 treated here January 7-14, 150 of them with 20 per cent, emulsion, 

 223 with a 25 per cent., and 127 at a strength of 40 per cent. Jan- 

 uary 7 and 8, when the 20 and 25 per cent, mixtures were applied, 

 the weather was cloudy and rather warm. January 9 a sleety rain 

 fell, covering the trees with ice which continued until January 14, 

 when the 40 per cent, mixture was applied. This was a clear day 

 with no wind. 



Regarding this as an experimental test of the effects of the 

 soap emulsion of kerosene, both on the scale and on the tree, I sent 

 Mr. Braucher for an inspection of this orchard October 2, 1901, be- 

 fore beginning the fall work of the season. A general view of the 

 orchard showed that the treatment as a whole had been very ef- 

 fective, but that more scales had survived in that section of the or- 

 chard treated with the 20 per cent, emulsion than in either of the 

 other two. Two trees were found, in fact, in this part which 



