INSECTS AND OTHER ANIMAL Pests INJuRIOUS TO FIELD BEANS 993 
One or more slugs were then placed in the cylinder at some distance from 
the treated plant. 
In the experiments summarized in table 8, the repellent effect of bordeaux 
mixture is shown. MHellebore and lime, as well as salt and lime, showed 
some killing power under insectary conditions. Calcium arsenate and 
lead arsenate when sweetened with molasses were fatal to the bean plants, 
and the ineffectiveness of arsenate of lead as a stomach poison of A. 
agrestis is shown. 
In the summer of 1918, contact substances, in powder form, were tried 
against A. agrestis near the field laboratory at Perry. The material was 
dusted lightly on the slug with a Niagara duster and the animal was then 
returned to natural conditions. Five slugs were used in each test. The 
results of some of these experiments are given in table 9: 
TABLE 9. ExpPERIMENTS WITH POWDERED-CONTACT SUBSTANCES AGAINST AGRIOLIMAX 
AGRESTIS 
Material applied Effect on slugs 
SPANOS MIO cea oes Hae RS ee ee et eee 
IROUK TOUNOVUNNIO So a cee ee eae ae eee ac a ee 
AGG! TOTES 5c 5:4 GSS ARE I ene eens ne 
Killed slowly if extensively used 
Killed slowly if extensively used 
Killed slowly if extensively used 
PS ASICHDNOSUALCH ERM ear. neoE terrae Ne ee tiaad Vices Govan, Not killed 
NC EDLASlLelE meee teas nS. 5 waren oo ets ENA LE Not killed 
HiitT ROT OUMURD ONE Rea bess ets este. A teehee: wtidtyeive Sok Not killed 
Sulfate of potash 
Killed quickly 
Nitrate of soda 
=sied ead. ce ee er rhe nnn ta 
ERIN S 6 SS OSC Loe ee eae Tee a teat Oe 
Aur-slaked lIme:........<.+.+92<. 2S Pee en erie ny hae 
Killed quickly 
Not killed 
Not killed 
Killed rather slowly 
Killed quickly 
Killed quickly 
Not killed 
Killed slowly if extensively used 
Killed very quickly 
Killed quickly 
Killed quickly 
Killed very quickly 
Killed very quickly 
Killed slowly 
Sali, aval ltrs (ES) aie eee eee Oe eee een eae 
Hellebore and lime (1-10) 
Hyposulfite of soda 
The nitrate of soda and the kainit proved injurious to the plants when 
tested in the field. Of the dusts that were not injurious to the plants, as 
recorded in table 9, the salt-and-lime and the hellebore-and-lime combi- 
nations, and the chloride of lime alone, acted the most rapidly, altho some 
of the other materials also showed killing power. 
