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Legner, E. F.  1958.  Some effects of aldrin, chlordane, dieldrin and heptachlor

        on the European earwig.  M.S. Thesis, Utah State University.  56 pp.

 

 

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INTRODUCTION. ......................…........................................................1

 

REVIEW OF LITERATURE. ................................................................2

 

METHODS AND PROCEDURES.. .......................................................9

 

        Trapping. ..........................................................................................9

 

        Laboratory experiments. ...............................................................11

 

        Concentration of chemicals. ..........................................................13

 

        Field experiment using granular insecticides. .............................14

 

        Temperature and relative humidity.. ...........................................14

 

        Attraction to baits..….....................................................................16

 

RESULTS AND DISCUSSION. ...........................................................18

 

        Effects of the light dosage. .................................................….......18

 

        Effects of the medium dosage. ......................................…............19

 

        Action of the Heavy Dosage   .........................................…...…....20

 

        Response of nymphs and adults to chemicals..............................32

 

        Comparison of the light, medium and heavy concentrations.....32

 

        Recovery from the effects of chemicals…....................................37

 

        Exposure time and chemical potency. .........................................37

 

        Residual life of chemicals in experiments II and III...................44

 

        Results of field treatments with granules. ...................................46

 

CONCLUSIONS. ..................................................................................49

 

SUMMARY....................................................................................…....53.

 

LTERATURE CITED. ….............................................................…....54