66 



ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



RESULTS IX OTHER YEARS. 



No other tests of the late sprayings than these enumerated have 

 been made. In the other tests the number of worms left after the 

 early sprayings has not been sufficient to give accurate results, and 

 none has been applied. 



The first test of the relative value of the early sprayings was made 

 on a single variety in 1904. The results in the first brood were good, 

 but in the second brood most of the apples on the unsprayed trees 

 and some of those on the once-sprayed trees fed more than one worm, 

 so that the number of apples saved did not show the real killing 

 power of the sprayings. 





Table XIV. — Worms killed in the first brood by early sprayings, Smart d- Hatch 



orchard, 190 h- 



First 

 spraying-. 



Second 

 spraying. 



Total 



number of 



wormy 



apples. 



Percentage 

 killed. 



Number 



of apples Percentage 

 with calyx killed, 

 wormy. 



Number 

 of apples 

 with side 

 wormy. 



Percentage 

 killed. 







1 

 1 



o 



1 



439 



192 



37 





 66 

 92 



2S9 



110 



10 





 62 

 97 



150 

 82 

 27 







45 

 82 



This same orchard was used for the elaborate test of 1905, the 

 result of which has been given. In 1906, although only about one tree 

 in seven was bearing at all and those only about half a crop, three 

 varieties were used in a third test. On account of the small number 

 of trees bearing, no unsprayed checks were left and results can only 

 be compared with those of former years. 



Two other tests were made this year (1906) to see if the same 

 results could be obtained in the earlier and warmer sections of the 

 State. One test was made on three blocks of Ben Davis at Lehi, and 

 the other one on two blocks of the same variety at Provo. 



In the case of the Lehi orchard the trees were young and bearing 

 only from 300 to 350 apples apiece. The unsprayed trees were nearly 

 one-third worm} 7 in the first brood, showing that the orchard wouk 

 have been entirely wormy if unsprayed; consequently there were 

 worms enough in both broods to give fairly accurate results. These 

 results are averaged in Tables XV and XVI. 



Table XV. — Worms killed in the first brood bri early sprayinas, Lehi orchard, 



1906. 



First 



Second 



spraying. 



spraying. 



- 







 

 1 

 1 





 1 







1 ti 



Total Number of Number of 



Second number of ' Percentage apples with Percentage apples with 

 Wormy killed. calyx killed, j side 



apples, j j wormy. wormy. 



45 

 11 



+ 4 



+ j 



+ o ■ 



Percentage 

 killed. 



