Endrin 
Endrin dust tested in pot experiments at 5 1b/A produced no 
mortality among Eisenia foetida after 2 months' exposure (Hopkins and 
Kirk, 1957). In a second experiment, up to 1024 1b/A of endrin gave 
erratic results. 
Patel (1960) used endrin to successfully control earthworms 
in tobacco seed beds in India. He used a 0.01% emulsion spray at a rate 
of about 27 1b/A [1 oz 20% emulsifiable concentrate in 12.5 gal water; 
sprayed at 1 gal/16 sq ft (Imperial gallons)]. Earthworm species and 
soil types were not identified. 
Heptachlor 
Polivka (1953) applied heptachlor to plots of 100 sq ft each 
on an Ohio golf course at rates of 5, 10, and 20 1lb/A. Treatments were 
made in April, and 5 weeks later there were no significant population 
differences between earthworms on treated and untreated areas. By the 
following May, however, all treated plots had earthworm population means 
significantly lower than the untreated areas. The heptachlor probably 
was applied in dry form. Soil types and earthworm species were not 
identified. 
. Hopkins and Kirk (1957) made two series of pot tests of the 
effects of heptachlor on Eisenia foetida. In the first test, 2 months' 
exposure to heptachlor at a rate of 7.5 1b/A did not affect the worms. 
In the second test, worms were exposed for 4 days at rates of 32, 64, 
128, and 256 1b/A; the LDsg for 96 hours was 163 1b/6-in A. 
Smith (1959) studied earthworms on Louisiana fields treated 
with heptachlor and on untreated fields. Treatments of approximately 
2 1b/A of granular heptachlor were applied in late February or early 
March. Worm population samples were taken at intervals throughout the 
summer on both treated and untreated land, Final data in this paper 
showed seasonal fluctuations in earthworm populations that appeared to 
be unrelated to the heptachlor treatments, although preliminary findings 
(Glasgow, 1958) had suggested otherwise. 
Monuron 
Martin and Wiggans (1959) tested the effects of monuron on 
Eisenia foetida at solution strengths of 0.1, 1, 10, 100, and 1000 ppm. 
The worms were immersed for 2 hours, then exposed an additional 24 hours 
in peat moss dampened with the solution. Worm survival was 90% at 1 ppm, 
80% at 10 ppm, and nil at 100 ppm and 1000 ppm. No attempt was made to 
express these results in terms of field applications. 
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