6oo NEW JERSEY STATE AGRICULTURAL 



Neither of these materials produced the least good result and 

 no further trials were deemed desirable. 



Experiment io — Lime, sulphur and caustic soda made up as 

 described in Bulletin No. 169 at page 14, but with just double the 

 quantity of water; a half strength. The test application was made 

 July I, on trees 25 and 26 on which there was an abundance of 

 active larvae and recent sets. Examined July 3rd and 4th, and 

 finding no notable injury, sprayed trees 356 to 376 inclusive. 

 Next day trees 356 to 362 and 371 to 376 were very white, the 

 others were not so contrasting and, in all cases, the young- scales 

 seemed to have been wiped out. The foliage had been a little 

 ;-calded on some trees, but not generally nor to an injurious ex- 

 lent. July 1 6th a very few larvse and recent sets were seen on 

 trees 25 and 26, but most of the older scale was dead. The foliage 

 was discolored and mottled but none had dropped. On trees 356 

 to 376, very few living scales were found in any stage. Larvse 

 had been killed under the parent scales and very few could be 

 found active on the tree. The foliage was generally discolored 

 or mottled and, on some trees, near the centre, the leaves were 

 badly burnt and had dropped. July 30th, the foliage on many 

 trees was a little ragged, but on the whole was not noticeably bad. 

 There was a general though rather thin scattering of white sets 

 and crawling larv?e, probably from scales that were nearly mature 

 before the application was made. Tree No. 360 was exceptionally 

 bad, being already well covered with very recent sets and moving 

 larvse. 



August 13th, conditions were not much worse, and the trees 

 treated with this mixture were ranked as the best in the orchard. 

 The foliage was more noticeably ragged than before; but the 

 scale situation seemed to have improved. September 2nd, this 

 group had dropped to the third rank, though a close rival of the 

 "Con. Sol." There were many breeding scales now on trunk and 

 branches, and a few plump adults on the new growth. There was 

 a general scattering of white sets and moving larvae and on the 

 whole it was deemed unwise to allow the trees to go longer. Sep- 

 tember 7th, sprayed with "Con. Sol", i part, to water 40 parts, 

 and closed this experiment. 



Judging by the effect on the foliage, the danger limit was 

 reached in the strength of the mixture and, while reducing the 

 amount of water would probably add materially to the killing 

 power of this combination, it would be likely, also, to make it 

 unsafe to use on peach trees at least. It is posible that an applica- 

 tion made two or three days earlier might have been more sue- 



