EXPERIMENT STATION REPORT. ' 589 



Salt, or "Con-Sol." Use at the rate of i to 50, experimentally on 

 I tree, and examine 24 hours later. If no material injury appears, 

 prepare 50 gallons of the mixture and spray as many trees as 

 may be thoroughly covered with it. 



It will be noticed that the object here is to test the lime and sul- 

 phur preparations as summer washes, and peach foliage, being 

 least resistant, furnishes the best subject. 



Pursuant to instructions, trees Nos. i, 2 and 3 were sprayed 

 with the Potassium sulphide i pound in S gallons of water. Trees 

 4, 5 and 10, were sprayed with the same, i pound in 3 gallons of 

 water. Trees 6, 7 and 8 were sprayed with the Potassium sul- 

 phide and lime as directed in Experiment 3. Tree 9 was sprayed 

 as a test with the sulphite of soda,i pound in 5 gallons of water, 

 on June i8th, and on June 20th, additional trees 13, 14, 15 and 16 

 were sprayed. Tree 12 was sprayed as a test with the sulphide of 

 soda and lime under Experiment 5, June i8th, and on the 20th, 

 additional trees 17 and 18 were sprayed. Tree 11 was sprayed 

 with the "Con Sol," i to 50, June i8th, and on the 20th, addi- 

 tional trees 19, 20, 21, 22, 23 and 24 were sprayed. The number 

 . of treated trees was less than directed in some cases ; but good 

 reasons existed for the departure from instructions. 



Experiments i, 2 and 4 were not afterward duplicated, hence 

 they can be finally recorded at this point. In all cases the trees 

 had a few small dead twigs and branches. No crawling larvae 

 were observed on the i8th, but there were many examples be- 

 neath the adult scales, ready to emerge. A few young were 

 observed on the 19th, and not until the 20th was ■'here any general 

 movement. 



Experiment i — Potassium i pound, water 5 gallons ; a simple 

 solution; applied to trees i, 2 and 3. June i8th. Trees i and 2 

 were fully covered until everything looked wet ; tree 3 was 

 sprayed to a drip. Afternoon warm and the trees dried rapidly, 

 having a washed appearance and a slightly bluish tint. 



June 19th, the leaves at the centre of the tree had a scalded 

 appearance; June 20th, the damage to the foliage was more 

 apparent, while no decided effect was noticeable on the scale.s. 

 July 3rd, most of the old leaves had dropped and new foliage was 

 developing at the tips of the twigs. On tree 3, the tender shoots 

 at the center of the tree, where the drenching was most complete, 

 were partly killed. The variety was Reeves Favorite. As to the 

 scales, there had been, undoubtedly, a thinning out ; but active 

 larvae and recent sets were found on each tree in considerable 

 abundance. July i6th, the scalded foliage had disappeared, the 



