EXPERIMENT STATION REPORT. 607 



seemed to be dead. Where the scale scurf is thickest it now comes 

 off in soaked flakes and this last has been, without doubt, the 

 most effecti\'e apphcation of the year. There is httle doubt, how- 

 ever, that there are yet enough Hving scales well out on the twigs 

 to provide for a brood in 1905, unless winter applications are 

 made. 



Tree 2 — Yellow Trcnsparcnt Apple. Marcfi loth, sprayed 

 thoroughly with the "Universal Insecticide and Scale Killer", 

 covering evenly to the tips of the twigs. 



April 26th. buds began to start; May loth, first blossom clus- 

 ters open; May 17th, was in full leaf and petals began to drop. 

 The tree made a fair set of fruit which dropped during early June 

 until, on the 28th, only 20 nicely developing apples were left. 

 These were all taken off to pre\'ent raids into the garden. At that 

 time the tree was in at least fair condition, but there was scale 

 everywhere. Not so many larvse as recent sets and breeding 

 females. Obviously the March application had been practically 

 ineffective. 



June 30th, sprayed thoroughly with the Pyrol tree and plant 

 spray, i part to water 40 parts, and gave a thorough coating. ■ 

 July 8th, there were as many larvae as before, and plenty of new 

 sets. Very little if any benefit had been derived from the Pyrol, 

 and an application of the Horticultural Compound, 2 ounces in 

 I gallon of water, was made. 



July 13th, conditions had improved. There were fewer larvae, 

 very few recent sets and much of the scale throughout the tree 

 seemed dead and dry. Conditions remained fair until well along 

 in August, when another brood began maturing and reproducing 

 so as to give a sprinkling of white sets all over the tree. On the 

 19th it was again sprayed with the horticultural compound as 

 before. Rain soon after the application seemed to lessen its 

 effectiveness and. a few days later, matters were almost or quite 

 as bad as before. 



August 29th, made a third spraying of the compound of the 

 same strength as before, and again there was some reduction 

 among the younger stages ; but the breeders and those about to 

 become so were not reached, and by the middle of September 

 there was as bad an infestation as at any time during the summer. 



September 21st. sprayed with i part of soluble petroleum to 3 

 parts of water and 5 days later the greater part of the adults, all 

 of the larvse and recent sets, and many of the older sets were 

 dead. There were some larvse ready to emerge, but altogether 

 the scale condition was better than at any time previous during 



