caa a22 4500 397572093 CHVBK 20180308164844.0 cr unu---uuuuu 161202e19960801xx s 000 0 eng 10.1093/ee/25.4.817 doi (NATIONALLICENCE)oxford-10.1093/ee/25.4.817 Harborage Preferences of American and Smokybrown Cockroaches (Dictyoptera: Blattidae) for Common Landscape Materials [Elektronische Daten] [A. G. Appel, L. M. Smith] Harborage preferences of American, Periplaneta americana (L.), and smokybrown, P. fuliginisa (Serville), cockroaches were determined in laboratory experiments. None of the potential harborages [juniper branches, Juniperus horizontalis L.; pine, Pinus taeda L.; straw; soil; rocks; or grass, Eremochloa ophiuroides (Munro) Hack, thatch] were toxic in continuous exposure tests. None of the harborages were repellent to American cockroaches, but in Ebeling choice box tests smokybrown cockroaches were significantly and consistently repelled by dry soil (mean ± SEM, 6.17 ± 0.68%). Tested with mixed-stage groups, juniper branches were preferred to all other potential harborages by all American cockroach stages. Smokybrown cockroaches also preferred juniper branches, but significant proportions were also found harboring under pine straw and rocks. Tested with single stages, small and medium American and smokybrown cockroach nymphs preferred pine straw rather than juniper indicating an interaction between cockroach stages and harborage selection by small and medium nymphs. Even though relative humidity was significantly greater (45.4 ± 2.2%) under juniper, light intensity was lower (7.9 ± 3.9 lux) under pine straw. Smaller nymphs selected harborages with smaller interstitial spaces than larger nymphs; pine straw had the smallest interstices of any of the tested harborage materials. Harborage selection by American and smokybrown cockroaches is mediated by the physical characteristics of the harborage and the presence of conspecifics. © 1996 Entomological Society of America Population Ecology nationallicence Periplaneta americana nationallicence Periplaneta fuliginosa nationallicence harborage preference nationallicence landscape materials nationallicence intraspecific interactions nationallicence Appel A. G. Department of Entomology, Auburn University, Auburn, AL 36849-5413 aut Smith L. M. Department of Entomology, Auburn University, Auburn, AL 36849-5413 aut Environmental Entomology Oxford University Press 25/4(1996-08-01), 817-824 0046-225X 25:4<817 1996 25 ee https://doi.org/10.1093/ee/25.4.817 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.4.817 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Appel A. G. Department of Entomology, Auburn University, Auburn, AL 36849-5413 aut NATIONALLICENCE 700 1- Smith L. M. Department of Entomology, Auburn University, Auburn, AL 36849-5413 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/4(1996-08-01), 817-824 0046-225X 25:4<817 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford