652 NEW JERSEY STATE AGRICULTURAL 



spray under considerable pressure, was forced around the vines 

 so as to fill the air and hit the insects attempting to fly away. 

 The result was excellent, and while leaf-hoppers v-^ere present 

 during the remainder of the season in small numbers, they were 

 not plentiful enough to seriously affect the foliage, which re- 

 mained on longer and in better condition than ever before in 

 my experience. None of the leaves turned completely rusty 

 and dry before maturity, and the amount of benefit derived was 

 easily observable by comparison with other nearby ^ines. 



On the same day sprayed also i Japan Golden Russet pear, i 

 Lawrence pear, i Gravenstein apple and i Baldwin apple. The 

 results were unsatisfactory and inconclusive. Examinations 

 were not made until several days after the spraying and at that 

 time matters were in much the condition they were when the 

 work was done. It appeared probable that most of the moving 

 larvae and some of the recent sets had been destroyed • but there 

 certainly had been no effect upon the number of older forms nor 

 upon the breeders. A simple tobacco mixture is evidentlv not 

 sufficiently active to reach these scale insects in any but the 

 naked stage. 



