CODLING MOTH IN COLORADO. 



Ill 



cloth bands, folded to two or three thicknesses, are very satisfactory 

 for banding purposes. 



PERCENTAGE OF TRANSFORMING AND WINTERING LARVAE. 



Season of 1915. — By reference to Table LXXXI it will be seen 

 that 432 larvae, or 47.52 per cent, of the first-brood larvae that were 

 reared in the insectary, transformed in 1915 to form the second 

 brood; the remainder, 477, or 52.48 per cent, wintered. Out of 

 1,858 larvae of the second brood, 20, or 1.08 per cent, transformed 

 to form a third brood and the remainder, 1,838 larvae, or 98.92 per 

 cent, wintered. As previously mentioned, in the Grand Valley none 

 of the third-brood larvae transform until the spring of the next year. 



Table LXXXI. — Percentage of codling moth larvce wintering, Grand Junction, 



Colo., 1915. 



Brood. 



Number of larvse — 



Per cent 

 trans- 

 forming 

 in 1915. 



Per cent 

 winter- 

 ing. 



Leaving 

 fruit. 



Trans- 

 forming 

 in 1915. 



Winter- 

 ing. 



First 



909 

 1,858 



432 

 20 



477 

 1,838 



47.52 

 1.08 



52.48 

 98.92 





Season of 1916. — The percentage of transforming and wintering 

 larvae of the first, second, and third broods reared in the insectary is 

 given in Table LXXXII. As shown therein, 766 larvae, or 74.15 per 

 cent, of the first brood transformed; 267 larvae, or 25.85 per cent, 

 wintered. With the second brood, 170 larvae, or 6.71 per cent, trans- 

 formed and 2,362 larvae, or 93.29 per cent, wintered. There were 

 328 third-brood larvae, all of which wintered. 



Table LXXXII. — Percentage of codling moth larvw wintering, Grand Junction, 



Colo., 1916. 



Brood. 



Number of larvae — 



Per cent 

 trans- 

 forming 

 in 1916. 



Per cent 

 winter- 

 ing. 



Leaving 

 fruit. 



Trans- 

 forming 

 in 19i6. 



Winter- 

 ing. 



First 



1,033 



2,532 



328 



766 



170 







267 i 74.15 



2,362 , 6.71 



328 0. 00 



25.85 



93.29 



100. 00 





Third 









LASPEYRESIA POMONELLA (L.) VAR. SIMPSONII (BUSCK). 



During the course of the codling-moth studies, the light buff col- 

 ored variety of the codling moth known as Laspeyresia pomonella 

 (L.) var. simpsonii (Busck) was bred from material collected in 

 the field. 



