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1.
Updated 2023 from: Legner, E. F.
1958. Some effects of aldrin, chlordane,
dieldrin and heptachlor on the European earwig. M. S. Thesis, Utah State University. 56 pp. Title Page Acknowledgments Contents
Tables &
Figures Introduction
SUMMARY
Tests to determine both residual action and initial kill of aldrin, chlordane,
dieldrin and heptachlor were conducted at three separate dosages under variable
outdoor insectary and controlled greenhouse conditions, and with limited
field tests using single dosages of granular formulations.
All chemicals used in the field tests showed highly effective results
although distinct differences did not exist between them. Initially, the
quickest kill was obtained with heptachlor and dieldrin, but at the end of
six days, the results of all four chemicals were comparable.
Laboratory experiments revealed that dieldrin was the most effective in
producing the highest kill, and was followed by aldrin, heptachlor and
chlordane in descending order of effectiveness.
As far as residual life is concerned, dieldrin ,surpassed all others,
followed by aldrin and chlordane. The shortest exposure time was needed with
heptachlor and aldrin. Chlordane was the weakest in this respect. It was found, however, that in
order to accurately judge the effectiveness of any particular one of these
chemicals in relation to all or any of the others, consideration of the
atmospheric conditions, the life stage of the earwigs, and the length of time
that earwigs were in direct contact with the chemical, was a necessity. Page
Number References
Table 1
Table 2 Table
3-4 Table
5 Figure 1-2 Fig. 3-4 Fig. 5-6 Fig. 7-8 Fig. 9-10 Fig. 11-12 Fig. 13-14 Fig. 15-16 Fig. 17-18 Fig. 19-20 Fig. 21 Fig. 22-23 Fig. 24-25 Fig. 26-27 Fig. 28-29 Fig. 30-31 Fig.
32-33 Fig.
34-35 Fig.
36-37 Fig.
38-39 Fig.
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