caa a22 4500 397570740 CHVBK 20180308164840.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.430 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.430 Electroantennogram Responses of Western Corn Rootworm (Coleoptera: Chrysomelidae) Adults in Relation to Maize Silk Morphology and Phenology [Elektronische Daten] [E. M. Abou-Fakhr, B. E. Hibbard, D. K. Jewett, L. B. Bjostad] Volatile maize, Zea mays L., silk semiochemicals are attractive to Diabrotica virgifera virgifera LeConte, western corn rootworm, adults and were evaluated using an electroantennogram (EAG) to determine the morphology and phenology of silk that is most EAG active. Senescing portions (the brown portion that protrudes from the tip of the ear) of silks 7-24 d after silk emergence elicited strong EAG responses from adults, significantly stronger than EAG responses to the green portion of silks (under tlle husks) or whole silks from the same phenology, When the EAG response of adults to the portion of silk that protrudes from the tip of the ear was evaluated at different phenologies, EAG response was significantly stronger to silks 7-24 d past silk emergence than to silks 1-4 d past silk emergence. Both males and females gave strong EAG responses to senescing portions of silks, hut the response of female antennae to senescing silk was significantly greater than the response of males. Dichloromethane extracts of senescing, brown silks elicited significantly higher EAG responses from the antennae of western com rootworm and D. undecimpunctata howardi Barber, southern com rootworm, adults than dichloromethane extracts of green portion of silks (under the husks) or husks. © 1996 Entomological Society of America Physiological and Chemical Ecology nationallicence Diabrotica virgifera virgifera nationallicence Zea mays mays nationallicence electroantennogram nationallicence silk nationallicence semiochemical nationallicence Abou-Fakhr E. M. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut Hibbard B. E. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut Jewett D. K. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut Bjostad L. B. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 430-435 0046-225X 25:2<430 1996 25 ee https://doi.org/10.1093/ee/25.2.430 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.430 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abou-Fakhr E. M. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut NATIONALLICENCE 700 1- Hibbard B. E. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut NATIONALLICENCE 700 1- Jewett D. K. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut NATIONALLICENCE 700 1- Bjostad L. B. Department of Entomology, Colorado State University, Fort Collins, CO 80523 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 430-435 0046-225X 25:2<430 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