FOURTEENTH ANNUAL MEETING. 



153 



of these fruits and even 15 per cent, on apples and pears. A 

 slight leaf injury may follow, but since the stronger the mix- 

 ture the more destructive it is to the scale, is it not good prac- 

 tice to risk a little for the sake of efficiency? Even though 

 a slight leaf injury follows, is it not preferable to the injury 

 caused by the scale? 



A few of the results obtained with different strengths of 

 mixture will now be given. 



15 PER CENT. K-L WITH RoSIN SoAP. 



A pear tree perhaps 14 years old, with a thick bushy top, 

 with rough cracked bark on trunk and larger limbs, plas- 

 tered with scale, and with the twigs, leaves and fruit cov- 

 ered with the younger insects, was sprayed on July 20. In 

 this instance a little more rosin soap was used than is now 

 advocated. The mixture was applied through a Vermorel 

 nozzle with medium opening and there was no clogging. Ex- 

 aminations were made from time to time to note results. On 

 August I no live scales could be found and the mixture was 

 sticking remarkably well on both leaves and limbs. A good 

 many leaves had turned black and were dead, but there were 

 not enough in this condition to seriously injure the tree. 



On August 10 the spray was still sticking well and a few 

 old scales were alive on the rough bark and on the fruit, but 

 none on the leaves. There were also a few young ones mov- 

 ing at this time. 



In an effort to eradicate the scale by two summer treat- 

 ments from a tree so badly infested and so difficult to spray 

 thoroughly as this one was, a second application was made 

 on August 18. On the 26th a most careful examination re- 

 vealed only three live scales and these were young ones. 

 There were doubtless more on the tree, but they could not be 

 found. The next examination was made six weeks later on 

 October 8, when one old female and a few young were found 

 in one place and a few young ones in two other places. These 

 results are most satisfactory, although a few insects remained 

 for seed. 



A test was made to completely eradicate the scale with one 

 spraying from young trees of three years' growth. Fifteen 

 per cent. K-L with rosin soap i quart per barrel, was used 



