ginning to ripen. The trees soon became very heavily in- 

 fected, and on July 20 it was not uncommon to observe from 

 10 to 15 on a single peach, and in one instance 20 were 

 counted. . . . (E. B. No. 64, p. 6.) For control on peaches 

 D'r. Morrill recommends fumigating the trees with tobacco 

 under tents, since "jarring is likely to shake off the fruit, and 

 many of the bugs will escape by flying." The aim of this 

 fumigation is not to kill the insects, for tobacco smoke does 

 not kill them. "It stupifies them, causes them to fall to the 

 ground, where they can be easily and quickly killed" (p. 14). 

 This, be it understood, is merely a proposed means of con- 

 trol. The U. S. Entomologist is not anxious to have it made 

 clear that this is merely dishing up a theory. In practice it. is 

 well known that peach foliage is very sensitive to fumigation, 

 especially during daytime, when the foliage is dry, and the 

 smoke is then especially likely to cause the fruit to drop pre- 

 maturely. Even during daytime, when the ground under the 

 trees is "neat as a pin," there will be trouble finding the 

 dropped bugs to be killed, supposedly by crushing with the 

 foot. Suppose you have 100 trees to fumigate and the fumi- 

 gating must be done, usually, repeatedly how many tents 

 will you need to have a ghost of show to kill any appreciable 

 part of the whole? Then again, these bugs may attack vegeta- 

 tion, wild or cultivated, too tall to be covered by a tent, or at- 

 tack shrubbery and plants growing wild, where the use of a 

 tent is not feasible, aside from the cost, thus multiplying un- 

 checked. 



On pages 13 and 14 of my Circular No. 140, I pointed out 



27 



