INSECTS AND INSECTICIDES 
43 
moth that are leaving the apples and going in search of a suitable 
place to spin their cocoons. Burlap bands are cheap and seem to 
be as good as any. 'The writer took 1,481 codling moth larvae 
under a single burlap band one season. Old gunny sacks cut into 
strips serve as well as anything. The band should not be less than 
four inches wide and should be composed of three thicknesses of 
the cloth. 
The bands should be wrapped loosely about the trunks, the 
ends overlapped and held in place by a single carpet tack pushed 
in with the thumb. 
If used against the codling moth they should be removed 
once in a week or ten days for the purpose of killing all the worms 
and then replaced. 
The bands should be placed on the trees about the 10th of 
June in the warmer parts of the State, and about the 20th of June 
in the northern parts. 
Bands of paper or wire screen are sometimes wrapped about 
the entire trunk to prevent the entrance of borers, as shown in 
Plate 4 Figs. 2 and 3. 
35. HOPPER-DOZERS OR HOPPER-PANS. 
For the purpose of catching jumping insects, especially grass¬ 
hoppers, the hopper-dozer or hopper-pan is most useful. The re are 
different methods of constructing these pans. A form used by Dr. 
Riley and illustrated by him many years ago is shown at Phg. 2. 
The pan in the illustration is entirely of sheet-iron, and is drawn 
across the field by two men or two horses. In the bottom of the 
pan is placed a small amount of water with kerosene on it. All 
grasshoppers that come in contact with the oil die. The back of 
the pan may be extended by means of stakes at the corners and a 
strip of cloth hung between them. Such an extension catches 
many grasshoppers that would otherwise escape. A modification of 
this pan is shown in bulletin No. 112, of this station by Mr 
P. K. Blinn. 
36. STICKY SUBSTANCES. 
Bandages of sticky substances, such as printer’s ink, u Den- 
droline,” “Raupenleim,” “Tree Tangle-P A oot” or even cotton 
batting, are sometimes used to prevent insects from climbing trees. 
Where oily substances are used it is safer to put them on a bandage 
of stout paper, which is then wrapped about the trunk of the tree. 
THE APPLICATION OF INSECTICIDES. 
I think it best not to attempt to show types of apparatus for 
