44 
ICE WATER. 
This was used in spray and poured upon the plants in quantity, also 
worms were submerged in the water for periods of time up to ten seconds. 
Every trial showed this to be utterly valueless as aremedy. Occasion- 
ally a small worm would be injured but in no case that I observed were 
any killed outright. Temperature of water during trials varied from 
35° to 38° Fah., air from 90° to 95° Fah. <A hot day was purposely 
selected for the work. 
TANSY WATER. 
Strong decoctions of this were made both by soaking and boiling the 
leaves. In both cases it was apparently as strong as could be made. 
Used in the field, no result whatever. On worms confined in closed 
jars they died in about six hours. In cages no effect whatever, though 
tested repeatedly and very heavily applied. 
TOMATO WATER. 
A strong decoction of this was made by boiling and used as above 
with quite similar results. In many instances the substance has de- 
stroyed the worms in jars (small wide-mouth bottles) and not under 
exposed conditions. The larvee were not drowned but only moistened. 
This is important as showing that the manner of using a substance is 
quite important. 
DREER’S INSECT TERROR. 
This powder was used both in the field and in cages. In no instance 
of the field trials were any of the larve injured, though it was thoroughly 
applied, lightly with bellows and heavily by hand. Used in cages it 
had no effect whatever except that in one instance 20 per cent. of rape 
were killed where it was applied to food so heavily as to completely coat 
itover. P. brassice was not affected by its use though confined from 
four to five days where food plant was completely coated with powder. 
I feel perfectly safe in saying, after abundant tests, that this substance 
is perfectly worthless. 
HAMMOND’S SLUG SHOT. 
This was used only on Cabbage Worms (rape and brassice). In field 
tests several hundred plants were used and tests made very thoroughly. 
At first the powder was dusted on lightly and was almost an entire 
failure, but with repeated and heavier dustings better results were ob- 
tained; however none of the results were sufficiently successful to com- 
mend its use. Where used heavily not over 20 per cent. of rape were 
killed, and brassice were not injured. In none of the field tests was I 
able to find dead brassice. Worms of both species were frequently 
