CONTROL OF CODLING MOTH IN COLORADO. 35 



to have well-made hose of sufficient length and hose couplings and 

 clamps that will stand the strain of the work without breaking or 

 allowing the hose to be forced off during the spraying operations. 



As previously stated, it is believed that the use of spray poles 

 equipped with the whirlpool-disk type of nozzles will result in a larger 

 percentage of clean fruit than if the short rod and Bordeaux nozzle or 

 the spray gun are used. The last two methods of spraying, however, 

 will save considerable time and it is therefore a question of the value 

 of time against a somewhat greater quantity of fruit free from worms. 

 The choice of method will depend upon availability and cost of labor, 

 weather conditions, size of orchard, and number of spray machines, 

 severity of infestation, variety of fruit, and other factors. Under 

 some circumstances the grower may find it an advantage to use the 

 spray gun for the calyx application and the first cover spray, changing 

 to the poles and finer sprays for the later treatments when the fruit 

 is larger and the skin is smoother, more waxy, and more difficult to 

 coat with the spray liquid. 



SUPPLEMENTAL CONTROL MEASURES. 



BANDING. 



Despite the most thorough spraying some first brood larvae will es- 

 cape the poison, and after completing their feeding period within the 

 fruit will leav^e it and spin their cocoons on the tree trunk and later de- 

 velop into moths which will in turn produce second-brood larvae. As a 

 means of catching these larvas the banding method may be practiced. 

 This consists of scraping the trunk to remove the loose bark, thus de- 

 stroying most of the places where the larv?e hide, and then placing 

 around the trunk a burlap band, folded into two or three thicknesses to 

 a width of about 6 inches. These bands should be examined every 10 

 days from about the middle of June to August 31, and all of the larvae 

 and pupa3 found beneath should be killed. A final examination 

 should be made any time after the fruit is harvested. The banding 

 method, if properly worked from year to year in conjunction with 

 thorough spraying, will gradually reduce the number of individuals in 

 the orchard so that a larger percentage of worm-free fruit will be ob- 

 tained than with spraying alone. 



CODUNG-MOTH TRAP. 



A codling-moth trap has been devised as a substitute for the band- 

 ing method. This device will serve the same purpose as banding and 

 will obviate the necessity of working the bands during the growing 

 season when labor is usually much needed for other duties. While 

 the spraying experiments do not indicate any pronounced benefit 

 through the use of the codling-moth trap, it should be borne in mind 

 that this device was used only one season and then only in a part of 



