Appendix. 



Id 



ot 



Lot I. Si'KAYEU WITH Lime, Sui-phur, and Salt, March 3. 



Tree No. 1. — A tree sixteen feet high, with a nine-inch trunk and a 

 twenty-foot top; in fair general condition, but badly infested with the 

 San Jose scale. After insecticide treatment March 3, sprayed with fifteen 

 gallons of water daily for seven days, from March 4 to 10 inclusive: 

 a total application of one hundred and five gallons, equal to about half 

 an inch of rainfall over the whole area beneath the tree top. Rains 

 falling, as above described, added about fifteen gallons of water to this 

 amount. 



Forty per cent of the young scales of the preceding year were alive on 

 this tree when the treatment began. Three days after, seventy-five per 

 cent of these had been killed, and five days after, eighty-four per cent. 

 The samples taken on the twelfth and nineteenth days showed an ex- 

 traordinary percentage of living scales — twenty-six per cent on each day — 

 and the average final ratio of scales killed stands at seventy-nine per 

 cent. 



Tree No. 2. — A sixteen-foot tree, with a nine-inch trunk and an eigh- 

 teen-foot top; in fair general condition, but badly infested with the 



