Report of State Board of Horticulture. 71 



lous persons rely upon this wide-spread ignorance to advertise 

 and sell "trap lanterns" and other worthless devices for cap- 

 turing the moths. Only a slight knowledge of the appearance 

 of the moth is needed to convince even the most credulous 

 that the masses of insects caught by such means rarely con- 

 tain a codling moth. Such a knowledge can readily be ob- 

 tained by picking some wormy apples in July or August and 

 placing them in some closed receptacle. In the course of a 

 few weeks the moths will emerge. When once familiar with 

 their appearance one may detect them flitting about the 

 trees at dark depositing their eggs upon the fruit, and more 

 rarely upon the foliage, and may occasionally observe them 

 during the daytime resting quietly upon the leaves or bark. 

 I have also rarely found them resting upon the ground. 



It is usually stated that the moths appear in spring about 

 the time the apple trees are in bloom. Slingerland sums up 

 his own observations, as well as those previously published by 

 other observers, with the statement that "what little definite 

 evidence there is upon this point indicates that the majority 

 of the moths do not emerge until several days after the 

 petals have fallen." 



At Corvallis there seems to be no relation whatever be- 

 tween the time at which the apple trees are in bloom and the 

 dates on which moths emerge. In 1896, apple trees were in 

 full bloom April 20, and most of the petals had fallen by 

 May 1. Only a few moths were reared that season, but some 

 of these emerged as late as the middle of June. In 1898, the 

 trees were beginning to blossom April 10, and the blossoms 

 had mostly fallen by April 28. In a storeroom moths began 

 to appear as early as April 10, and on June 16 two perfectly 

 fresh specimens were captured in the orchard. In 1899,. 

 moths began to appear in breeding cages April 10, and con- 

 tinued to emerge to July 1. April 21, the earliest apple trees 

 were just coming into blossom and the petals were not all oT 

 before May 10. Although the apple trees were in blossom 

 nearly two weeks later in 1899 than in 1898, the moths began 

 to appear at practically the same time (April 10-11) and 

 continued to emerge for nearly or quite two months after 

 the blossoms had fallen. 



