CONTROL OF CODLING MOTH IN ARID REGIONS. 



61 



Table V. — Wodhs kUUd in first brood hy tivo etirlii sprdi/iiu/s. Siintrt d- Hatch 



orchard. 



Table VI. 



-Woniifi hilled in second brood hy tuo early aiiniyini/s. Smart iC- 

 Hatch orchard. 



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

 worms the second year of sprayin<2; and also show 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 nnsprayed trees harbored more than one 

 worm. All of the records indicate that the more Avorms there are, 

 lip 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 1004 and again in 1905. They Avere applied with the same nozzle 

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

 and spraying stoj^ped as soon as the trees began to drip. The first 

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

 began to enter and the other two at IH-day intervals. 



Three separate tests were made in 1904. The first Avas on 12 trees 

 in an orchard that had no early sjn-aying. The trees A\'ere about one- 

 third wormy in the first brood, an indication that the apples AA^ould 

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

 brood injury, AA'ere as folloAA's: 



Table VII. — Results of three late sprayings alone, in Hoggan orchard. 1904- 



6 nnsprayed trees averaged. . , 

 6 late sprayed trees averaged 



Wormy 

 apples. 



267 

 254 



Sound 

 apples. 



