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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
else was added. It was scattered over the infested area as in sowing 
grain. Before the winter rains came we were able to get the snails into 
action by sprinkling the treated areas with garden hose. The snails fed 
readily under these conditions. During the rainy season the entire 
infested area was treated twice with the poison, once in the fall and once 
in the spring. In our trial plot, which consisted of a garden 16 by 19>2 
feet, we secured in six days a kill of 92.46% of all snails present. There 
were 6,690 snails in the plot but of this number 259 were still sealed up. 
This gave us a kill of over 96% of all active snails. The results in our 
practical applications were fully as satisfactory. It might be well to 
state here that the brown snail {Helix aspersa) also feeds readily on this 
bait and the poison is highly recommended for that pest. 
In spite of the apparent thoroughness with which the clearing, burn¬ 
ing, and poisoning were done, it was still necessary to supplement by 
hand-picking in order to get the few that persisted in remaining sealed 
up. Hand-picking also had to be resorted to in getting the snails from 
underneath buildings, from fences, bridges, and other places where we 
could not use fire or poison. 
Progress of the Eradication Campaign 
The progress of the eradication campaign at the end of the first year 
has been such that even the careful observer in La Jolla no longer sees 
a white snail. A year ago there were millions of them and people came 
from neighboring towns to see them clustered in great masses on the 
weeds and shrubbery in the infested area. In the last ten weeks four 
live white snails have been found by inspectors from the San Diego 
County Horticultural Office. While the progress has been more than 
we thought possible in a year it no doubt will take several years of 
frequent and careful inspections and treatment before the white snail 
is entirely stamped out at La Jolla. 
Literature Cited 
1. Mclean, Robert R. “Snail pest at La .Jolla, California.” Cultivator, 
Vol. 58, No. 22, p. 593. June 3, 1922. 
2. De Stefani, T. “Helix pisana and the damage it is capable of doing to 
citrus trees.” Nuovi Annali di Agricoltura Siciliana. Anno 2, N. S., Fasc. I, 1913, 
Palermo. Translated by Harry S. Smith. See California Citrograph, Vol. 8, No. 2, 
pp. 35, 56, 57. Dec. 1922. 
3. Lovett and Black. “The gray garden slug.” Oregon Agric. Exp. Sta. 
Bull. 170. June 1920. 
Chairman R. E. Campbell: Two papers have been submitted by 
members who could not be present and will be read by title as follows: 
