162 BOARD OF AGRICULTURE. [Pub. Doc. 



Prof. J. B. Smith has issued a circular in which he strongly 

 recommends the use of pure kerosene for this insect. In a 

 bulletin by Professor Webster of the Ohio Station is a series 

 of carefully conducted experiments with kerosene on fruit 

 trees, which is very instructive. In this series were four 

 pear, six apple, six peach, five plum and two cherry trees. 

 One pear tree was killed, one injured and the other two were 

 uninjured. One apple tree was killed, two slightly injured 

 and three ^s^ere uninjured. Four peach trees were killed 

 and the other two were badly injured. One plum tree was 

 slightly injured and the remaining four were not affected. 

 The cherry trees were both killed. These trees were treated 

 in the month of March. Twelve of them were sprayed with 

 the kerosene, with the thermometer between 34° and 38°F., 

 and it was applied to the remaining eleven with a brush, with 

 the thermometer ranging between 40° and 45°F. No per- 

 ceptible difference could be seen in the effect between the 

 two methods of applying the kerosene. In view of the re- 

 sults of these experiments, carefully conducted by Professor 

 Webster, I do not feel ready, at the present time, to advise 

 the use of kerosene for the destruction of the San Jose scale, 

 except for experimental purposes. 



Before closing I want to call attention to this box, in which 

 are some of the more common cranberry insects. [Specimens 

 exhibited.] 



The Chaie3IAN. Now, gentlemen, we have a short time 

 for questions. 



Mr. Pratt. I would like to inquire if Professor Fernald 

 can tell us from whence we received the San Jose scale. 



Professor Fernald. It was first introduced into Cali- 

 fornia. It was brought from there to New Jersey and 

 Missouri nurseries. 



Mr. Pratt. You have no knowledge of its being im- 

 ported directly into Massachusetts ? 



Professor Fernald. It occurs in Japan and some of the 

 Pacific Islands, but I presume New England does not import 

 any stock directly from there. 



Mr. . A year or two ago arsenate of lead was for sale 



at grocery stores. I bought some and went over my potatoes, 



