lt)4 NEW YORK STATE MUSWUM 



Series 1. Nine different washes Avere applied June 22 in this 

 series, and observations made at intervals from June 26 to Sep. 

 28. Very small amounts were used and the solutions allowed 

 to stand two hours. Diffei-ent results might have been secured 

 if larger quantities had been employed and applications made 

 at once. The spraying was done with a fine hand atomizer and 

 treatment limited to young, badly infested appletrees which boi-e 

 all stages of the scale. These trees had been set out only a few 

 weeks and consequently made little growth, though the foliage 

 was in fair condition. The various washes did^not injure the 

 leaves, and it will be noted that washes 1 to 5, which were either 

 unboiled or very dilute, adhered poorly, while 6, 7 and 9 con- 

 taining bordeaux were better in this respect, and 8, which was 

 boiled and also contained -bordeaux, was much better. None 

 could be distinguished on the tree 10 days after application. All 

 washes killed the majority of the crawling young but did not 

 prevent the development of established scales or the growth of 

 young appearing after treatment. There was very little appre- 

 ciable difference in the various washes, and on Sep. 8 all the 

 trees were badly infested by all stages, crawling young being 

 specially abundant. 



Series 2. Six washes were applied July 28 in this series, and 

 observations made from July 30 to Sep. 8. The washes were 

 prepared in substantially the same manner as indicated above, 

 and applied to the same lot of trees with the exception of a branch 

 of a peachtree which was sprayed with 6. The condition of the 

 foliage and scale infestation was identical with that in series 1, 

 and the weather conditions were similar. Apple foliage was un- 

 injured by any of the washes, but peach leaves were slightly 

 burned at the tips by wash 6. Washes 3 and 4 were boiled 15 

 minutes, were more adhesive than the others, and Aug. 10 showed 

 good color but on Sep. 8 no trace remained. The crawling 3'oung 

 only were killed. 



Series 3. Washes in this series were applied Aug. 11 and were 

 similar to those of series 2. Observations were made from Aug. 

 17 to Sep. 8, and the conditions, preparation, etc., were practi- 



