S3 



day following- the insecticide treatment. Sixty-six per cent, of the 

 scales alive in the beg-inning-; 85 per cent, of these dead by the 

 third day, 03 per cent, by the seventh, and 95 per cent, by the 

 twenty-second day; the effect. May 12, the destruction of 99.4 per 

 cent. August 20, two hundred scales were examined, and none alive. 

 Tree No. I J. — A twelve-foot tree, with a six-inch trunk and a 

 thirteen-foot top; in good condition, and but moderately infested. 

 Sprayed with water three times, beg-inning- March (>, with inter- 

 vals of one day between applications, the first rainfall coming- be- 

 tween the first and second sprayings. Fifty-seven per cent, of the 



scales alive in the beg-inning; 89 per cent of these dead on the 

 seventh day, when the first subsequent count was made, 94 per 

 cent, on the twelfth, and 98 per cent, on the twenty-second; effect, 

 May 12, the destruction of 98.9 per cent. August 20, five hundred 

 scales examined, none alive. 



