EXPERIMENT STATION REPORT. 6oi 



cessful. The insects that escaped were those early sets that had 

 almost reached the adnlt stage and were sealed under a black 

 scale at its toughest condition. There was almost a complete 

 destruction of larvse and recent sets, and a standstill period until 

 the survivors of the first brood began to reproduce generally. It 

 might have been safe to duplicate the application instead of using 

 the ''Con. Sol.", but on the other hand, the danger was that foli- 

 age already weakened by the first application might succumb to 

 the second. The effect was almost as good as that produced by 

 the Potassium sulphide and lime, and the injury to foliage was 

 Jess. The cost of the material is not nearly so great, and it may 

 be that on trees with more resistant foliage it has a field in sum- 

 mer work. At all events this point is worth a further test. 



Experiment 6 — "Con. Sol.", a concentrated solution of lime, 

 sulphur and salt, combined so as to make a liquid that is stable 

 so long as it is kept from contact with the air. It was put out as 

 a winter mixture to be applied at the rate of i part of the solution 

 in 50 parts of water. I received it too late for winter work and 

 decided to at least attempt its use as a summer spray at the full 

 recommended strength. I had used a little in the experiment 

 orchard but not under such circumstances as to enable me to de- 

 termine its effectiveness. June i8th, the mixture of a deep orange 

 red color, i to 50, was thoroughly sprayed on tree 11. A few of 

 the smaller twigs and branches of the tree were dead ; but other- 

 wise it was in rather good condition though very scaly. The 

 scales were ready to reproduce but no larvae had as yet actually 

 emerged from beneath the female cover mg. June 20th, as there 

 was no apparent injury on the tests, sprayed trees 19 to 24 inclu- 

 sive with the material at the same strength. July 3rd, when these 

 trees were again examined, very few larvcC or recent sets were 

 seen and the great majority of all the older scales was dead. The 

 foliage at that time was very slightly burnt. 



Having determined with reasonable certainty that the mixture 

 I to 50 could be safely used on peach, trees 302 to 355 were thor- 

 oughly sprayed July 2nd. On the 5th the trees had a washed 

 appearance and were somewhat darker in color than normal, 

 while the foliage appeared altogether unaffected. As a whole, 

 the larvre and recent sets had been pretty well cleaned off except 

 on trees 302, 318 and 354; where, however, the larvae at least 

 were not very active. 



July 18th, tree 11 had only a very few live insects in any stage 

 and an unaffected foliage. Trees 19 to 24 varied somewhat, all 

 of them had some moving larvae and recent set?, but some more 



