yb DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



After the loose bark had been scraped from the trunks of 16 trees, 

 burlap bands were placed around the main trunk in the usual man- 

 ner about 3 feet from the ground. On 5 of the trees bands were also 

 placed on the main branches, so as to obtain records as to the relative 

 number of larvae ascending the trees from the ground from wind-fallen 

 fruit, as compared with the number of larvae descending from fruit 

 on the trees. The trees, with one exception, consisted of winter varie- 

 ties, 10 of which were Golden Russet, 1 Northern Spy, 2 Greening, 

 and 3 undetermined. Since only 16 trees of the whole orchard were 

 banded, it is believed that the comparatively small number of first- 



\0> 



8o 

 70 

 60 

 5& 

 10 

 30 



ZO 



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ii~ [-'M- pp 































mm i \'~\\ in 





t io 13 lb is 21 25 24 31 3 6 1 12 15 18 21 2% 27 30 2 5 8 II l"t 17 20 J 



JULY AUG. SEPT. 



5J*«2. 



' 8 



1 I't 17 20 23 24 E<3 1 «• 1 10 |3 |b 11 



OCT. NOV. 



Fig. 21.— Band-record curve of 1909, at North East, Pa. (Original.) 



brood larvae which were removed had no influence upon the number 

 of larvae of the second brood. With the appearance of the first larvae, 

 July 13, the banded trees were examined every three days throughout 

 the season until November 13. (See fig. 21.) 



In comparing the number of larvae collected from the upper and 

 the lower bands, it will be noted (Table XXXIII) that 53 per cent 

 were taken from the lower bands and 47 per cent from the upper 

 bands. These figures are of interest as bearing on the effectiveness 

 of gathering windfalls. A summary of the band records is given in 

 Table XXXIV. 



