226 ENTOMOLOGICAL NEWS. [Sept., *02 



The trees at Constantia were sprayed August 13 to 17, 1901, 

 the usual time of application here in order that the treatment 

 maj' serve for both the scale and the leaf -curl, the fruit buds 

 starting about the first of September, depending on the season. 



There was a light rain during the night after tests i and 2 

 were applied, but it had no appreciable effect on the appear- 

 ance of the trees. The trees in the different tests could be 

 distinguished easily by the color. One and 2 showed a dis- 

 tinct olive tinge, which was not quite so distinct in i as in 2 

 on account of the greater amount of lime. Three and 4 were 

 very white, 3 slightly dull as compared to 4, while 5 and 6 

 showed only a peculiar light yellowish green tinge with no 

 apparent coating. The lime coating was the coansest of all 

 and showed the greatest tendency to flake off, leaving con- 

 .siderable patches unprotected. The lime-salt wash was finer 

 grained and adhered better than the lime. The lime-sulphur- 

 .salt wash is uniformly fine grained and adheres well, the trees 

 still retaining the characteristic appearance to some extent by 

 January 3, 1902, whereas on the other trees the coating has 

 almost entirely disappeared. 



The trees were carefully examined at frequent intervals, and 

 it soon became apparent that in all of the tests only a very small 

 percentage of the in.sects had been killed, — possibly the imper- 

 fectly protected ones, — and that the eggs escaped without injury. 

 Oviposition continued the same as on the untreated trees. In 

 .some cases the waxy covering .showed a tendency to slough off, 

 leaving the insects exposed. In one in.stance the unprotected 

 female was ovipositing freely, the eggs lodging in the mass of 

 surrounding scale. 



The eggs were hatching freely by October ist, and it was 

 with no little interest that the progress of the young scale was 

 noted. Thus far, January. 4, 1902, none of them have survived 

 on the trees .sprayed with linic-sulphur-salt, i and 2, nor on the 

 trees sprayed with sheep dip, 5 and 6. On the trees sprayed 

 with lime-.salt and lime, the young have .settled without any 

 apparent difficulty, showing no appreciable preference for the 

 patches where the lime had scaled off, thus showing that lime- 

 salt and lime have no .special preventive value. It .should Uv 



