FOURTEENTH ANNUAL MEETING. 159 



15, 20 AND 25 PER CENT. K-L ON PeACH TrEES. 



Three badly infested peach trees four years old were 

 sprayed November 19, 1904, with 15 per cent., 20 per cent, and 

 25 per cent. K-L respectively. Examinations from time to 

 time showed that the killing effect was continuing week after 

 week and is not quite exhausted yet. On January 28 the fol- 

 lowing record was made : — 



Tree sprayed with 15 per cent. K-L had 963-10 per cent, 

 scales dead, 3 7-10 per cent, alive or doubtful. 



Tree sprayed with 20 per cent. K-L had 95 4-10 per cent, 

 scales dead, 46-10 alive or doubtful. 



Tree sprayed with 25 per cent. K-L had 100 per cent, 

 scales dead, none alive or doubtful. 



A good many of the doubtful ones are doomed, so the per- 

 centage of death rate is expected to be higher where 15 per 

 cent, and 20 per cent, mixtures were used. 



In a three year old peach orchard in Central Delaware were 

 scattering trees quite badly infested. These w^ere stub 

 pruned, leaving only two or three feet of the main limbs. A 

 20 per cent. K-L miixture was made with a hoe and applied 

 with a whitewash brush November 23. On January 23 speci- 

 mens of bark from these trees were examined and the scales 

 were practically all dead. 



15, 20 AND 25 PER CENT. K-L ON PeAR TrEvES. 



These trees were badly infested and were sprayed De- 

 cember I and 2. The results on several of the pear trees are 

 somewhat irregular and are given with some hesitancy. This 

 must be understood and accepted as a report of progress. 

 The examination of these trees was made on January 27. 



Tree sprayed with 15 per cent. K-L had 584-10 per cent. 

 scales dead, 41 6-10 per cent, alive or doubtful. 



Tree sprayed with 15 per cent. K-L had 804-10 per cent, 

 scales dead, 196-10 per cent, alive or doubtful. 



Tree sprayed with 15 per cent. K-L had 805-10 per cent, 

 scales dead, 195-10 per cent, alive or doubtful. 



Large numbers of the doubtful ones are badly discolored 

 and can soon be classed as dead. 



