REPORT OF THE STATE ENTOMOLOGIST 1902 129 



several limbs killed by the oil, but the others were apparently 

 all right. A Kieffer peartree was in excellent condition and 

 had a little fruit. One Dutchess pear was apparently unin- 

 jured and bore no fruit, while another would produce some. 

 Practically the same results were obtained on Beurre d'Anjou 

 and Vermont Beauty peartrees. The Meeches prolific quince- 

 trees bore out the promise of an earlier date and gave no evi- 

 dence of having suffered in the slightest from the application. 

 A yellow Gage plum was in excellent condition but bore no- 

 fruit, and the same was true of a natural cherry, except that it 

 had a little fruit. A Magnum Bonum plum was in excellent con- 

 dition and bore considerable fruit. 



An examination of the apple orchard June 12 failed to reveal 

 a single living scale insect; and, though some of the trees had 

 developed adventitious shoots, their occurrence could hardly be 

 attributed to the use of the oil, since they were almost equally 

 common on the Trees sprayed with whale oil soap. The plum- 

 trees sprayed with the crude petroleum also developed a con- 

 siderable number of adventitious shoots, and it is possible that 

 they were injured by the oil, though such is not necessarily the 

 case. 



An examination of these trees Nov. 11 by my assistant, 

 Mr Walker, showed that a few were very badly infested by the 

 scale, that some were badly infested and that several were 

 dead. The owner, since the treatment of the previous fall, had 

 set a number of new trees in vacant places. Most of these and 

 some of the others were in good condition. 



In passing judgment on this experiment, it should be remem- 

 bered that no treatment whatsoever was given after the spraying 

 in December, and that, before the end of the season, the few 

 scale insects which presumably escaped destruction had an 

 excellent opportunity to multiply. Up to the middle of the sum- 

 mer at least there were very few living scale insects to be seen 

 on these trees; and we can not help feeling that, while the insects 

 are now abundant on a number of the trees, the application 

 proved very efficient and was perhaps as effective, though some- 

 what injurious, as any spray which could be applied. 



Good's caustic potash whale oil soap no. 3. This insecticide was 

 applied at the rate of 2 pounds to the gallon to 315-28 and 



