CONTROL OF CODLING MOTH IN ARID REGIONS. 



61 



Table v. — Worms killed in first brood by two early sprayings, smart d- Hatch 



orchard. 



First Second 

 spraying, spraying. 



1904. 



1905. 1905. 



Total 

 wormy ap- 

 ples. 



Total 

 wormy ap- 

 ple-. 



Number of 



appl<< 



with calyx 



wormy. 



Number of 



app 

 with side 



wormy. 





247 



27 



220 



97 

 6 

 91 

 92 



65 



1 

 64 

 98 



32 

 5 

 27 



84 



1 1 



Worms killed 



Per cent killed .. 



Table VI. — Worms killed in second brood by two early sprayings, Smart <.(- 



Hatch orchard. 



First 

 spraying. 



Second 

 spraying. 



1904. 1905. 1905. 



Total Total 

 wormy ap- wormy ap- 

 ples, pies. 



Number of 

 apples 



with calyx 

 wormy. 



Number of 



apples 

 with -iik- 

 wormy. 





712 273 



236 64 



476 209 



67 76 



177 



6 



171 



97 



96 



1 1 



Worms killed 



Per cent killed .. 



58 

 48 

 40 



Tables V and VI show clearly the reduction in the number of 

 worms the second year of spraying and also -how a corresponding 

 increase in the killing power of the early sprays. This increase is 

 probably not real : instead it can be taken to mean that in the first 

 test some apples on the unsprayed trees harbored more than one 

 worm. All of the records indicate that the more worms there are. 

 up to nearly 1 to each apple, the larger the percentage that will 

 be killed. 



VALUE OF THREE LATE SPRAYINGS. 



Three late sprayings were applied to the second brood of worms 

 in 1904 and again in 1905. They were applied with the same nozzle 

 used in the early sprayings, but the nozzle was held farther away 

 and spraying stopped as soon as the tree- began to drip. The Hist 

 of the late sprayings was applied as soon as the second-brood worms 

 began to enter and the other two at 15-day interval-. 



Three separate tests were made in 1004. The first was on 12 trees 

 in an orchard that had no early spraying. The trees were about one- 

 third wormy in the first brood, an indication that \\w apples would 

 be entirely destroyed unless sprayed. Results, counting only second- 

 brood injury, were as follows: 



Tabu VII. — Results of three late sprayings alone, in Hogg an orchard, /.'"'}. 





Wormy 

 apples. 



Round 

 apples. 



(i unsprayed tr«'»v averaged 





o 



6 late sprayed trees averaged 









