40 



we advise judicious pruning with the definite purpose of 

 lowering tall trees. Trimming, if done carefully can reduce 

 the height of large trees by some 10 feet in the course of 

 two or three years without material injury, and where scale 

 is abundant it is very probable that this trimming will have 

 to be done in the near future if not attended to early, in 

 order to remove dead or dying branches. Plenty of power 

 is another essential to good work, as a weak spray always 

 drifts with the wind. It makes little difference whether 

 this power be supplied by engine or hand, provided, in the 

 latter case, that the man at the pump is equal to the task 

 assigned. We can hardly expect a man to maintain an ade- 

 quate pressure if he has an old-fashioned, hard-working 

 pump to contend with, but if it be a modern affair, easy of 

 operation, there should be no difficulty, though where a 

 large number of trees are to be sprayed it is probable that, 

 in the long run, an engine of some kind will prove most 

 efficient. 



In closing, we would summarize as follows : The San 

 Jose scale has attained a wide distribution in our fruit 

 growing sections. It has demonstrated its destructive abil- 

 ity beyond all question, and greater losses are bound to oc- 

 cur in infested orchards unless remedial measures are 

 adopted. Despite the general distribution of this pest, it is 

 by all means advisable to avoid infestation so long as pos- 

 sible. Finally, when the enemy appears, secure good ap- 

 paratus, not necessarily expensive, and give the most 

 thorough treatment possible with any one of the several in- 

 secticides known to be effective in checking this pest. 



Question. "In spraying high trees, how reach with 

 fine spray?" 



Dr. Felt. "I should reduce the height of the trees." 



Question. ''Are not the soluble oils injurious to the 

 trees?" 



Dr. Felt. "We can tell better in five or six years. My 

 impression is that successive annual applications will after 

 a few years, injure trees. On several trees in New York city 

 trealed with these oils, I have seen what appeared to me to 

 be oil injury. This does not develop itself the first year 

 and you think your trees are benefited. So, I say, go a 

 little slow with oils. We want something that we can use 

 from year to year without injuring the trees." 



Question. "How late in the season can we spray in 



