41 



Mr. Alwood desired that those who had used the lime, sulphur, and 

 salt wash would make their experience known, because he considered 

 it a very important question. Ho stated that he had not used the wash 

 enough to have come to definite conclusions about it. He considered 



that it was very important to discover a treatment that would not 

 prove injurious to trees, for in his opinion the average workman would 

 often be likely to injure trees by the oil treatment. 



Mr. Fiske remarked that in connection with their experience with 

 the wash as used last winter, the results were very much like those 

 already reported by Mr. Quaintance. The scale had not been killed 

 at once, and notes made in May as to the efficiency of the wash indi- 

 cated that it was very unsatisfactory. It was estimated that from 10 

 to 2o per cent of the scale- were alive on the trees at that time. 

 Examinations in August, however, showed that the per cent of live 

 scale- was very much less. He did not think that the insects which 

 actually escaped treatment bred so fast on trees sprayed with the lime, 

 sulphur, and salt mixture as in the case of those sprayed with oil. 



Mr. Burgess stated that a great deal of spraying had been done last 

 winter in Ohio with crude petroleum, especially in the peach district, 

 and a great deal of damage had been done. A- a rule, crude petroleum 

 had been used undiluted. He considered that if a grower uses a pump 

 designed to make the mechanical mixture of the oil with water and 

 sprays liberally, he may get as much oil on the tree as if he sprayed 

 sparingly with the undiluted crude oil. A good many of the grower; — 

 a majority of them, in fact — used the pure crude oil. A large number 

 of trees had been killed and a large number had been seriously 

 injured. These were mostly peach. He did not recall at that time 

 that apple trees had been seriously hurt by the use of pure crude 

 petroleum, although a number of orchards had been treated with this 

 substance, and the owners were of the opinion that the scale laid been 

 greatly reduced. 



In reference to the lime, sulphur, and salt wash, Mr. Burgess stated 

 that a few experiments had been made and a few growers had used the 

 mixture, and. from what he had seen, the results were good. Some of 

 the growers from northern Ohio had. within tin 1 last month, visited 

 9ome of the peach and apple orchard- in southern Illinois that had 

 been treated by the spraying force employed by Or. Forbes. rhese 

 orchards had been treated the past winter with the lime, sulphur, and 

 salt wash, and had been visited by the growers in order to get an idea 

 of what could be done with this wash. They appeared to be very well 

 satisfied with the treatment, and some were making arrangements to 

 use it on their trees. Mr. Burgess further stated that in the peach 

 district of northern Ohio he did not consider it advisable to recom- 

 mend the use of crude oil in any form except to those grower- who 

 had been able to handle it successfully in the past. While some had 



