14 
Of the first result I can only say that all larvae died from disease 
shortly after, and at this date (October 19) the fact is clearly noticeable 
in the leaves, those appearing previous to about the 15th are badly eaten, 
while those that were put forth after that date are almost intact. 
On October 1 , the difference between the plants treated with slug shot 
and those not treated was very apparent in the much more thrifty look 
of the former, and the larger number of perfect leaves, and this differ- 
ence is still very perceptible. 
Just what per cent, of leaves was killed by insecticide, it is of course 
impossible to determine, but the plants have a better look. 
II. — Native Cabbage Woem. {Pieris protodice Boisd.) 
Experiment 1.— HAMMOND’S SLUG SHOT. 
Upwards of 50 larvse, taken from leaves of turnip, were placed in a 
cage, and leaves, slightly dusted with the insecticide, placed therein. 
Result . — Two days after, many were dead and others were dying. On 
the third day nearly all were dead. Eventually but 5 pupated. The 
single meal of dusted leaves proved sufficient, although ample food not 
dusted was afterwards supplied them. 
III. — Fall Web-Worm. ( Hypliantria textor Harris.) 
Experiment 1. — WOLF’S SOAP. 
Solution of 1 oz. soap to half gallon water; temperature, 90° F. 
sprayed with atomizer on foliage adjacent to web ; also in web, wetting 
same quite thoroughly, nearly all of the caterpillars being within. 
Result . — Two days after application, about GO per ernt. were found to 
have been destroyed. The foliage which had been sprayed did not ap- 
pear to suffer for about three days, when the caterpillars again returned 
to it and ate the leaves as though they had not been treated. 
Experiment 2.— POTASSIUM SULPHIDE. 
Solution, 1 part sulphide to 500 parts water; applied to web and fo- 
liage with garden syringe. 
Result . — On following day, a small per cent, appeared to have been 
destroyed, but a week later the effects of the experiment could not be 
noticed. Does not seem to render the foliage distasteful. 
Experiment 3. — COPPERAS WATER. 
Dissolved 1 oz. copperas in one pint of water; drenched web, and 
thoroughly wetted foliage. 
Result . — One day after, many caterpillars were dead and others scat- 
tered about in the web, seemingly very sick. Five days after, the foliage 
remains untouched and all are dead. 
