37 



FUMIGATION. 



Test No. 1: 



August 28, 1902. Fumigated four apples, using 1 ounce cyanide; treatment 



similar to that of the buds in lot 1. 

 August 31, 1902. No living young or old scales present. 

 October 15, 1902. No young have developed. Old scales dead. 

 Test No. 2: 



August 28, 1902. Fumigated three apples, using three-fourths ounce cyanide; 



treatment similar to that of the buds in lot 2. 

 August 31, 1902. No living young or old scales present. 

 October 15, 1902. No young scales have developed. Old scales dead. 

 Test No. 3: 



August 28, 19C3. Fumigated three apples, using one-half ounce cyanide; 



treatment similar to that of the buds in lot 3. 

 August 31, 1903. No living young present. On two apples some of the old 



females are apparently alive. 

 September 6, 1903. No young found. Old scales apparently dead. 

 October 15, 1903. No young have developed. Old scales dead. 



The effect of the gas on the scales was fatal in each case. No 

 living insects were noted in three days after treatment except in test 

 No. 3, where the smallest amount of cyanide was used, and they per- 

 ished without giving birth to young. 



DIPPING IN WHALE OIL SOAP MIXTURE. 



In the following tests the apples were placed in a coarse sack and 

 immersed in the soap mixture for fifteen minutes. 



Test No. 4: 



August 28, 1902. Dipped three apples in whale oil soap mixture; 2 pounds of 

 soap to each gallon of water. 



August 31. 1902. No living young or old scales observed; scales are dark in 

 color. 



September 6, 1902. A few young scales and lice present. 



September 15, 1902. Two apples very slightly infested; one not infested. 



October 15, 1902. Two apples very slightly infested; one not infested. 

 Test No. S.- 

 August 28, 1902. Dipped three apples in whale oil soap mixture; 2 pounds of 

 soap to each gallon of water. After removal they were washed with water. 



August 31, 1902. Scales are bright in color; young lice present on two apples. 



September 6, 1902. Most of the old scales are dead; many young crawling. 

 Well-developed females appear to be more easily killed than immature ones. 



September 15, 1902. Many young scales present. 



October 15, 1902. Plenty of live scales in all stages. 

 Test No. 6: 



August 28, 1902. Dipped three apples in whale oil soap mixture; 1 pound of 

 soap to each gallon of water. 



August 31, 1902. Lice crawling on two of the apples. 



September 6, 1902. Many mature females dead; lice and young scales pres- 

 ent on all apples. 



October 15, 1902. Plenty of live scales in all stages. 



