373 



Experiment 4 : 



October 25, emulsion diluted with 6 parts water. Result as iu preceding experi- 

 ment; tree afterwards subjected to geut^al treatment giveu orcliard. 



Concentrated crijstal potash hje. 

 Experiment 27 : 



December 16, 2 pounds lye dissolved in a gallou of water; January 17, fatal to 

 85 per cent of scales; March 11, fatality estimated at nearly 80 per cent; May 

 4, about 15 per cent of scales estiuuited to be living, the living ones occurring 

 somewhat in patches. Tree in leaf and fruit, not especiallj^ injured though 

 some of the smaller terminals died after blooming. This and the other trees 

 treated with lye present a beautiful, bright, clean api^earance, and have a very 

 noticeable red color. 

 Exiieriment 28 : 



December 16, 1 pound to the gallou ; .January 17, fatal to 75 per cent of the 

 scales; March 11, no change in condition noted. Tree afterwards subjected to 

 general treatment given the orchard. 

 Experiment 29 : 



December 16, I x)ound lye to the gallon; January 17, fatal to upwards of 50 per 

 cent of the scales. Tree afterwards subjected to general treatment given the 

 orchard. 

 Experiment 30 : 



December 16, J pound lye to the gallon. January 17, fatal to 20 per cent of the 

 scales. Tree afterwards given general treatment. 



Oref/oii waslt. 

 Experiment 6 : 



November 17, ordinary strength (sulphur 15 x>ounds, slaked lime 15 pounds, 

 bluestone IJ pounds, water to make 100 gallons) ; December 15, fatal to only a 

 small percentage of the scales; tree afterwards subjected to general treatment 

 given the orchard. 

 Experiment 7: 



November 17, double strength; December 15, fatal to very small percentage of 

 scales; May 4, tree still whitened with wash; larger scales, representing at 

 least 50 j)er cent, alive. 



California wash — Lime-salf-snl2)hur. 

 Experiment 8 : 



November 17, ordinary strength (sulphur 25 pounds, lime 50 pounds, salt 18 

 pounds, water to make 100 gallons) ; December 15, fatal to only a small per- 

 centage of scales; tree afterwards subjected to general orchard treatment. 

 Experiment 9 : 



December 15, double strength ; fatal to very inconsiderable percentage of the 

 scales; tree afterwards subjected to general treatment of the orchard. 



General treatment of the orchard. — The general orchard treatment 

 referred to as following a number of the above experiments was car- 

 ried out by the owner during April, the conclusion of the work being 

 about the 22d. The treatment was based on the results of the fore- 

 going experiments, and consisted in applying a compound soap wash 

 made by dissolving a j)Ound and a lialf of whale-oil soap and one-half 

 pound of hard soap in a gallon of water. The soap mixture was 

 kept hot during the application by the use of an oil stove taken into 

 the orchard, and so high was the temperature of the liquid when 

 applied that the pump was frequently too hot to hold. During the latter 

 18391— No. 5 2 



