STATE POMOLOGICAL SOCIETY. 5I 



tell whether or not they can be repeated year after year and 

 the same results obtained in general practice. 



Strong fungicides for the blossom bud spray follozved by 

 arsenate of lead alone. The high efficiency of arsenate of lead 

 in scab control suggested the following possible modification of 

 summer spraying practice. Use a strong fungicide combined 

 with a smaller amount of arsenate of lead when the blossom 

 buds are showing pink. For all later applications depend 

 entirely on arsenate of lead, using at least two pounds of the 

 powder or four pounds of the paste to each 50 gallons of 

 water. Work along this line has been going on for two seasons. 

 For the first application 3-3-50 Bordeaux mixture and lime- 

 sulphur 20 per cent stronger than standard have been used. 



The crop in each case has been very free from scab, but on 

 account of the fact that the omission of the first application of 

 standard dilution lime-sulphur on other plots failed to show 

 an increase in scab, it is impossible to draw definite conclusions 

 regarding the chief object in view. However, all the evidence 

 obtained tends to confirm the results secured where arsenate 

 of lead was used alone throughout the season and in previous 

 years. 



Apparently Bordeaux mixture is ruled out on the Ben Davis, 

 even for the first application when the leaves are unfolding, and 

 the blossom buds are not yet open. It produced more or less 

 leaf injury both seasons. What is more strange, russeting of 

 the fruit was materially increased when compared with the 

 check and with the plot sprayed with arsenate of lead through- 

 out the season. It seems hard to explain why an application 

 of Bordeaux mixture made before the blossoms buds opened 

 should produce a russeting of the fruit formed considerably 

 later, but this is what the figures show. In 1914 this plot 

 adjoined one sprayed three times with Bordeaux mixture, and it 

 was thought that the increased russeting might possibly result 

 from spray drifting from the latter plot. A relocation of the 

 plots in 191 5 prevented any such a possibility, but the increase 

 in russeting appeared just the same. No such difficulties were 

 experienced where lime-sulphur 20 per cent stronger than stand- 

 ard dilution was used for the first foliage spray. 



Dormant sprays for insects as affecting scab control. A few 

 years ago the pathologists of the Station demonstrated quite 



