Insects of Shade Trees and Their Control. 19 
The process then is as follows: Cut a strip of cotton about 2 inches 
wide and wrap it around the tree trunk so as to fill all the crevices 
of the bark. Over the cotton place a strip of 1-ply building tar 
paper about 5 inches wide, draw it tightly, and tack it securely where 
it overlaps. The adhesive is then spread out on the paper. (Tig. 6.) 
The sticky preparation is apt to become dry or covered with dust 
and insects and, in consequence, fail to function, so that it should be 
either renewed from time to time or it may be renovated by combing 
it so as to remove obstructions and 
bring the fresh material to the 
surface. 
Sheets of sticky fly paper may be 
used for tree banding, in emergencies. 
They are best placed over bands of 
cotton batting, as described above, 
and fastened to the trunk by means 
of heavy twine tied tightly around 
the upper and lower edges. 
STICKY PREPARATIONS FOR 
BANDING: 
The market offers proprietary prep- 
arations for banding which are fre- 
quently preferred because ready for Fie. 6.—Barrier of sticky material 
ee "y24° on tree trunk to prevent ascent 
use: Where materials, facilities, and cr caterpillars, wingless moths, 
hiniemate~ ivaliable, however, «these. «t- (Quaintance and Siegler.) 
preparations may be made at home. Homemade preparations offer 
advantages in that adulterant or harmful substances are sure to be 
excluded, the cost will be less, and substances may be used up that 
might otherwise go to waste. Following are some of the substances 
and mixture that may be employed for this purpose: 
ROSIN-CASTOR OIL MIXTURE.° 
Place 5 pounds of rosin and 3 pints of castor oil in a pot and 
heat slowly until the rosin is melted. Add more oil-if the resultant 
is too thick. 
AXLE GREASE, FISH OIL, AND ROSIN." 
These substances are used in Europe for the preparation of a tree- 
banding mixture which is reported effective. The mixture is made 
as follows: 
PACS OR RSC eee he see ee ae Ee Se pound__ 1 
LIAS Hates (oy ME ot ee 8 eee Ng DS 8 eee pint= saa 
Powdered) rosin=—=- 2522+ =~ ++ a 8) Cee ee pounds==.) .2 
®See also Department Bulletin 899, ‘Gipsy Moth Tree-Banding Material: How to 
Make, Use, and Apply It,’’ which may be obtained from the Superintendent of Documents, 
Washington, D. C., for 15 cents (postage stamps not accepted). . 
The rosin-castor oil mixture and the mixture of axle grease, fish oil, and rosin have 
been tested by the Bureau of Entomology in New England for banding purposes but are 
unsatisfactory in that region. 
