371 



Experiment 19: 



December 16, 1^ pounds of soap to the gallon; January 17, fatal to 85 per cent 

 of the scales; March 11, no living scales found, except two, in doubtful con- 

 dition ; tree still whitened with the soap ; tree originally deusely incrusted ; 

 May 4, fatal to at least 95 per cent of the scales; tree uninjured, but without 

 bloom or fruit. 

 Experiment 20: 



December 16, 1 pound of soap to the gallon ; January 17, fatal to 60 per cent of 

 the scales; March 11, but 10 per cent of the scales remaiu alive; May 4, per- 

 centage of living scales unchanged; tree uninjured and with fruit. 

 Experiment 21 : 



December 16, i pound of soap to the gallon; January 17, fatal to about 20 per 

 cent of the scales; tree was subsequently subjected to additional treatment. 

 Exiieriment 22 : 



December 16, i pound to the gallon ; January 17, fatal to about 10 per cent of the 

 scales; tree subsequently subjected to general treatment given the orchard. 



Home-made Ji><h-oil soap. 

 Experiment 15: 



December 16, 11 pounds of soap to the gallon; January 17, fatal to 50 per cent 

 . of the scales ; May 4, fatal to about 75 per cent of scales ; tree in leaf and fruit, 

 vigorous. 

 Experiment 16: 



December 16, 1 ixmud of soap to the gallon; January 17, fatal to about 20 per 

 cent of the scales; tree subsequently subjected to geueral treatment given the 

 orchard. 

 Experiment 17 : 



December 16, I pound t>f soap to the gallon; January 17, fatal to only about 5 

 j)er cent of the scales; March 11, more than 50 per cent of the scales living; 

 tree afterwards subjected to general treatment given the orchard. 



Resin wash. 

 Experiment 13: 



December 15, six times strength of summer wash; applied to ."u apple tree very 

 warm, almost scalding hot. January 17, examination indicated the death 

 of all the scales, some of which were not yet completely dried up ; March 11, no 

 living scales found ; May 4, most careful and extended examination resulted in 

 discovering 4 living scales; tree vigorous, but without bloom; trees on either 

 side in bloom, but other trees in neighborhood, untreated, also without bloom. 

 Experiment 31 : 



January 23, same strength as last, applied warm; March 11, fatal to 95 jier cent 

 of the scales; May 4, tree killed, excejit one vigorous shoot of last year's 

 growth, springing from near base; tree densely incrusted with scales, and its 

 death })robably due to this fact ; scales on the living branch not very numerous 

 and no living ones found. 

 Experiment 14 : 



December 15, four times strength of summer wash; January 17, fatal to 85 per 

 cent of the scales; March 11, but 5 per cent living; May 4, nil but the new 

 growth of last year dead, evidently from the scales which densely iucrust the 

 bark; fruit is set in one or two instances on the living portion; on the entire 

 tree 95 per cent of the scales are killed. 

 E};periment 32: 



January 23, same strength as last; March 11, fatal to 90 per cent of the scales; 

 May 4, tree healthy, with scattering fruit. Not above 10 per cent of the 

 scales living, and these confined to the terminals. 



