2\C> 



Bulletin 192. 



washes. I at once became interested because of the great difference 

 between your results and mine. But I think I can account for your 

 faihire of the wire netting protector. I have no doubt that the young 

 larvae crawled down tlie trunk riglit through your netting because 

 nothing was there to prevent it. (See figure 52.) In my experiments 

 I stopped the space at the top between the wire netting and the tree 

 with cotton (see figure 51) ; and, although I did not know at the time, 

 I now believe from your failure, that the larv?e became entangled in 

 my cotton and could not get down or around it. I did not think 



of your method of attaching the top, 

 and used the cotton as the simplest 

 method. Now I believe it was the 

 fortunate method, for I never could 

 find the borers in those cages, nor 

 could I find one borer in two hun- 

 dred trees where I used the wooden 

 wrap23ers (see figure 53), which I like- 

 wise stopped at the top with cotton. 

 I regard the wooden wrapper as the 

 most popular, simply because it is so 

 cheap, but the wire netting is just as 

 good, and if both be pushed into the 

 ground and the tops stopped with 

 cotton, they form a perfect protector 

 with us here. One gentleman told me 

 that he followed this wooden wrapper 

 plan in two orchards of 10,000 trees, 

 but lacked enough for 300 trees which 

 he did not wrap, and that he found 

 these 300 trees badly infested Avith 

 borers, but could find none below 

 the wrappers in the treated ones. 

 "But we also have another difference between our results that I 

 do not understand. I tried coal or gas tar in every way from a 

 small band to a large application covering the entire truidv, and on 

 both young and old, healthy trees as well as on sickly ones, and I 

 killed every tree in spite of all I could do. I tried it on not only 



52. — Con, (II irtre-cage pi'oiector 

 in j)osition on a peach tree 

 in experimental orchard. 

 A useless device. 



