133 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



that there was hut little immediate effect on the older scales, though 

 the crawling- young and recently set individuals had been killed. 

 Later examinations during the season revealed that, although the 

 adults were alive and actively breeding, but few of the young lice 

 established themselves, owing, no doubt, to the presence of the wash 

 upon the trees. This result is quite in harmony with that well 

 known to result from the use of the well-boiled wash applied in spring 

 shortly before the buds appear; that is, there is a continued effect 

 which is perhaps more important than the direct insecticidal action 

 of the wash. At the final examinations of these plats in the late 

 fall, the condition of trees sprayed once was notably better in regard 

 to freedom from scale than trees not sprayed, and on the plat sprayed 

 twice the scales had been very largely cleared from the trees, approxi- 

 mating in fact a condition resulting from a very thorough use of the 

 well-boiled wash during the dormant period. 



In the case of the peach orchard at Bentonville, Arkansas, reported 

 upon by Mr. J. B. Rorer, these trees were very badly infested with 

 the San Jose scale, many of them being almost completely incrusted. 

 The first application of the wash was made on May 5th, using the 

 formula : lime 15 pounds, sulfur 10 pounds, water 50 gallons ; and this 

 formula was again applied on May 21st to supplement the earlier 

 treatment, since this was very imperfectly applied. Another treat- 

 ment was given June 20th, using the 10-10-50 formula and a final 

 treatment July 9th, using the same strength of wash. This orchard 

 had had no previous attention whatever in regard to controlling the 

 scale, but the treatments very largely cleared the insects from the 

 trees. Many young lice, which continued to develop from the breed- 

 ing insects present failed to establish themselves, and thus, as the 

 older insects died, the scale gradually disappeared. The unsprayed 

 trees at the close of the season were in a very serious condition. INIany 

 of the larger limbs and twigs had l)een killed and all of the trees 

 greatly enfeebled. 



These two instances of the practical cleaning of peach trees of 

 scale, in view of the serious infestation which existed, are considered 

 very favorable to the usefulness of the wash as a sunnner spray, espe- 

 cially since it will doubtless come into extended use in the control of 

 fungous diseases, as already mentioned. In the case of peach, it 

 seems probable that when used as a fungicide for peach scab and 

 brown rot, it will at the same time suificiently destroy the scale as to 

 obviate the necessity of the usual dormant-tree treatment. Great 

 thoroughness in applications, however, would be necessary, reaching 

 the body, limbs and twigs. 



