370 



NEW YORK STATE MUSEUM 



Record of grubs taken in Falvay vineyard 1904 



ROW 



May 24 



June 1 



2 



3 



9 



10 



11 



13 



8 



4 



















13 



















IS 



2 

















!<; 















I 



0,0 





16 





















17 





















18 













2 



0,0,2 





i«J 





2.7.10 









I 







20 





0, 7 . 20,0 , 







1.7,1 



2 







21 



IS. 17 



6,3.5.5 







1,0 













22 







4,53.8,7.4 





2 













23 

 24 



10 





7.4.5. I 





I 





2 



0,0,1 



2 





1,3.0 









1,0 





25 



3.6 



2,3.1.8 













I 



26 



1.6 



4,2,3 















27 









9.5.0,4.4 











28 









0,2,4,0,0,4 











30 









0,0,0, I 











31 



2 

















32 





















36 



I 

















30 



3 



- 















4> 



,? 

















It will be observed that in comparatively few cases only, were 

 more than eight grubs found under a vine, and in the one case where 

 53 were taken from under one, these were obtained only after 

 extended diggings under the entire vine, whereas all of our sample 

 diggings in the spring of 1903, did not, as a rule, comprise more 

 than a quarter of an arc and even then were limited to a small 

 area in the immediate vicinity of the stem. Most of the sample 

 diggings in the spring of 1904, averaged larger than those of the 

 preceding spring, and in the case where 15 and 17 respectively 

 were found in row 21, May 24, one third to one half of the entire 

 area in the near vicinity of the stem was excavated in search of 

 the grubs taken. It will also be observed that in a great many 

 instances none were foimd, showing a striking difference as com- 

 pared with the year before. 



The efficacy of last year's collecting with a horse machine, was 

 further tested by operating the same apparatus over the experi- 

 mental area in the season of 1904. Three collectings, as in the 

 preceding year, were made; the first July i and 2, the second about 

 the 12th, and the third from the i6th to the 19th. The total col- 

 lections on each of these dates amounted respectively to 5312, 

 2003 and 1925, a total of only 9240, which should be compared 

 with the 154,900 taken from the area the preceding year. It 

 should be remembered, however, that these figures do not repre- 

 sent the actual decrease in the number of insects destroyed, because 

 the survivors of our operations in 1903, had an opportunity to 



