c;2 CoivORADO ExPERIME^NT STATION 
26. Ashes 
Wood ashes dusted upon plants while they are moist, has the 
tendency to keep certain insects away, especially flea-beetles and 
cucumber beetles. It does not kill the insects, but makes their food 
distasteful. 
27. IjME, Peaster and Road Dust 
These are used like ashes as repellants against flea-beetles and 
cucumber beetles, but are of little or no use in destroying insects, 
except, possibly, the pear and cherry slugs. 
INSECT TRAPS 
28. Eights 
Many night flying insects are attracted by lights. The lights are 
placed over a vessel containing water with kerosene over the surface. 
The insects fly against the lights and fall into the kerosene and water. 
Many beneficial insects are also destroyed in this way, so it is doubt¬ 
ful if it is very practical except in rare cases. Not all night flying 
insects are attracted by lights. Such an insect is the C( 5 dling moth. 
Some of those that can be caught in this way are the adults of the 
army-worm, cut-worms, corn, or boll-worm:s, and the beet web-worm. 
29. Bandages 
Burlap or other heavy cloth bands placed about the trunks of apple 
trees are very useful in capturing the larvae of the codling moth, as 
they leave the fruit and search protected places to spin their cocoons. 
If the loose bark is scraped from the trees, 50 to 60 percent of the 
larvae leaving the fruit can be caught. This is a very important 
help in cleaning up a badly infested orchard. 
The bands should be of three thicknesses of cloth. Wrap the band 
loosely about the trunk, lap the ends, and fasten with a tack. They 
should be placed on the trees by the 15th of June. Remove them 
every ten days until the 20th of August, and kill all larvae, then re¬ 
move when convenient after picking time. 
30. PIoppER-DozERS OR Hopper-pans 
The hopper-dozers are useful in catching the jumping insects, es¬ 
pecially grasshoppers. They consist of a large pan carrying water 
with kerosene on it, so arranged that it can be drawn across the 
field by a horse. The back of the pan should be extended until it 
is four feH high. The insects jump against this and fall into the 
water and oil. 
31. Sticky Material 
Bandages of sticky material are often placed around the trunks 
of trees to keep insects from climbing to the branches. The most 
