THE CODLING MOTH ON PEAKS IN CALIFORNIA. 



27 



almost continuously from April to August, inclusive, and do not 

 recognize the broods at all. However, it is well to know when these 

 broods appear, and what is meant by the term "brood." 



The overwintering larvae pupate in spring; the moths emerging 

 from these in late 

 April and during May 

 deposit eggs which 

 hatch into the first- 

 brood worms. This 

 brood is usually com- 

 paratively small and 

 the injury not severe. 

 Some growers are in- 



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 70 



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 55 



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29 



5 /2 /3 2i 



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7 14 2/ 2< 



9 5 /2 /9 26 Z 9 /6 23 



ySF&r: oc-7-. 



Fig. 7. — Codling-moth larvae collected from banded pear trees at Walnut 

 Creek, Cal., 1909. (Original.) 



clined to overlook the 

 importance of this 

 brood, and many fail 

 to notice any worms 

 until the second brood 

 begins to show just 

 prior to first picking. 

 The second is by far 

 the more destructive of the two broods, both by reason of its numbers 

 and because of the stage of the fruit when it appears. The first-brood 

 worms reach their development usually during the months of May and 

 June, pupate, and adults emerge and begin depositing eggs some one 

 or two weeks before the first picking of pears commences. Growers 

 can tell very well when the first of the second-brood worms will begin 



to appear by the use 

 of burlap bands put 

 on the trees in May. 

 Examine these once 

 a week and when the 

 first larvae are caught 

 under them they may 

 be put into glass jars 

 or tumblers with bits 

 of paper or rags and 

 kept under normal 

 out-of-doors condi- 

 tions. When the first 

 moths appear it will then be some two weeks before eggs are hatching. 



BAND RECORDS. 



Some idea of the development of the first-brood larvae and the time 

 of leaving fruit may be gained from Tables X and XI, which are the 

 band records at Walnut Creek for 1909. (See also figs. 7 and 8, which 

 show this data in diagrammatic form.) 



















































































































































































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5 12 /9 26 



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oct: 



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 200 



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 J40 

 /20 

 /OO 



eo 

 eo 



40 



20 



o 



Fig. 8.— Codling-moth larvae collected from banded apple trees at 

 Walnut Creek, Cal., 1909. (Original.) 



