18 Farmers’ Bulletin 1169. 
ing the upper edge down over the string so as to form a flange of 
loose cotton all around the tree. (Fig. 4.) It should be borne in 
mind that this barrier will remain effective only so long as the cot- 
ton remains fluffy, and even then, especially if the insects are very 
numerous, frequent examination of 
the band is necessary if it is to be 
kept in proper working order. 
WIRE SCREEN. 
Wire screen may be used to trap 
nonflying moths lke those of the 
cankerworms and tussock moth 
to prevent them from crawl- 
ing up the tree. Ordinary 12- 
inch 12-mesh fly screen is cut on 
a bias into pieces long enough at 
the top to overlap an inch or so 
after encircling the tree trunk at 
Fic. 4.—Barrier of cotton batting on the desired height and about 6 
aaa eee eee a Feeaee inches longer at the bottom. 
tance and Siegler.) Fasten the upper edge snugly 
around the tree with small carpet tacks and let the ends meet on a 
bias, so that the looser edge of the band stands away from the trunk 
about an inch all around and admits the ascending insects freely. 
Where a number of uniform sized trees are to be banded at the same 
time, the wire strip may be cut up as suggested on the accompanying 
outline (fig. 5). 
WRCO/1. OF TREE PLUS k INCYP 
z SS 
KOCACDNYT. OF 7KEE PLUS © INCTSUES> i 
Fig. 5.—Diagram of strip of wire screen with broken lines showing how to cut it 
for insect guards. 
These bands must be examined daily and moths collected under 
them crushed, as the tiny larve hatching from eggs they may lay 
will readily penetrate the screen. Because of this necessity, the use 
of wire bands is practicable only in limited instances. 
STICKY BANDS. 
Applied directly to the bark of the tree sticky bands may be in- 
jurious. The injury may be prevented, however, by applying the 
preparation on a strip of heavy paper. As such paper can not be 
made to fit snugly, cheap cotton batting may be used underneath it. 
