CONTROL OF CODLING MOTH IN ARID REGIONS. 



67 



Table XVI. — Warms killed in the second brood by early sprayings, Lehi 



orchard, 1906. 



, First 

 spraying. 



Second 



spraying. 



Total num- 

 ber of Percentage 

 wormy killed. 

 apples. 



Number of Number of 

 apples with Percentage apples with Percentage 

 calyx killed. Hide killed, 

 wormy. wormy. 







I ! 







1 

 



1 



75 

 31 59 

 21 72 

 20 73 





 2 93 



1 97 

 - 99 



47 



29 38 



20 



20 57 



These results show an even higher killing power in the calyx than 

 in the former tests, due. no doubt, to the fact that the small trees were 

 easier to spray thoroughly and that more liquid was applied in pro- 

 portion to the apples. 



In the Smart & Hatch orchard in 1906 and in the Provo te>t^ the 

 number of worms present to begin with was much smaller, and those 

 left after the early sprayings were so few in numbers that in some 

 cases the individual variation in the trees was greater than the differ- 

 ence between the sprayings. The actual percentages are therefore of 

 little value. Thi> is readily understood if one considers that with so 

 few moths in the orchards some trees might not be visited at all. 



Table XVII. — Worms killed by <<irlij sprayings in Sum ft & Hatch orchard. 1906. 



First brood. 



Second brood. 



Fir-t Second Total num- Number of Number of Total num- Number of Number of 

 spraying, spraying. ber of apples with apples with ber of apples with apples with 



wormy 

 apples. 



calyx 

 wormy. 



(?) 



, 



(?) 



side 

 wormy. 



wormy 

 apples. 



calyx 

 wormy. 



(?) 



(?) 



(?) 



side 

 wormv. 





Table XVI 1 1. — Worms killed by early sprayings in Provo <>rch<tr<i. 1906. 







Fir-t brood. 



-,d brood. 



First 

 spraying. 



Second 

 spraying. 



Total num- Numberof Number of 

 ber of apples with apples with 

 wormy calyx side 

 apple-. wormy. wormy. 



Total num- Number oi Number of 

 ber of apples with apple- with 

 wormy calyx side 

 apples. wormy. wormy. 





 



1 

 1 







1 







1 



17 

 8 



5 

 4 



9 



2 

 1 

 



6 



4 

 4 



21 

 11 



5 

 1 

 1 

 1 



16 



7 



! 



10 



The general average of Tables XVII and XVIII. with one excep- 

 tion, will be seen to be the same as that of the other-. The actual 

 percentage killed is less than where there were more worms; but as 

 the Smart & Hatch orchards were only 3 per cent wormy for the 

 season and the Provo orchard but a trifle over 1 per cent wormy, the 

 results are entirelv satisfactorv. 



