caa a22 4500 397547218 CHVBK 20180308164741.0 cr unu---uuuuu 161202e19960501xx s 000 0 eng 10.1093/aesa/89.3.475 doi (NATIONALLICENCE)oxford-10.1093/aesa/89.3.475 Ovipositional Behavior of Newly Colonized Corn Earworm (Lepidoptera: Noctiiidae) Females and Evidence for an Oviposition Stimulating Factor of Male Origin [Elektronische Daten] [Geetha Bali, Ashok K. Raina, Timothy G. Kingan, Juan D. Lopez] Oviposition behavior of newly colonized females of the corn earworm, Helicoverpa zea (Hübner), was very different from that of females from a laboratory colony. Newly colonized virgin females laid very few eggs, and mated females required a host plant or a part of it such as corn silk for egg laying. Mating stimulated both egg maturation and oviposition in newly colonized females. Extracts of male accessory glands injected into 1-d-old virgin females, stimulated both egg maturation and oviposition. During the observation period, largest number of eggs was laid on the 6th d after treatment. However, 5-d-old virgin females injected with the accessory gland extract showed a significant increase in oviposition within 24 h. Further purification of the active factor is in progress. Females mated to males from which testes, accessory glands, and the duplex had been removed behaved like virgins. Topical application of methoprene, a juvenile hormone analog, to virgin females resulted in an increase in egg maturation but not in oviposition. © 1996 Entomological Society of America Behavior nationallicence Helicoverpa zea nationallicence oviposition nationallicence feral insects nationallicence Bali Geetha Department of Entomology, University of Maryland, College Park, MD 20742; and Insect Neurobiology and Hormone Laboratory, USDA-ARS. aut Raina Ashok K. To whom reprint requests should be sent: Insect Neurobiology and Hormone Laboratory, USDA-ARS, Building 306, BARCEast, Beltsville, MD 20705. aut Kingan Timothy G. Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD 21228; and Insect Neurobiology and Hormone Laboratory, USDA-ARS. aut Lopez Juan D. Areawide Pest Management Research Unit, USDA-ARS, 2771 F & B Road, College Station, TX 77845. aut Annals of the Entomological Society of America Oxford University Press 89/3(1996-05-01), 475-480 0013-8746 89:3<475 1996 89 aesa https://doi.org/10.1093/aesa/89.3.475 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/aesa/89.3.475 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bali Geetha Department of Entomology, University of Maryland, College Park, MD 20742; and Insect Neurobiology and Hormone Laboratory, USDA-ARS aut NATIONALLICENCE 700 1- Raina Ashok K. To whom reprint requests should be sent: Insect Neurobiology and Hormone Laboratory, USDA-ARS, Building 306, BARCEast, Beltsville, MD 20705 aut NATIONALLICENCE 700 1- Kingan Timothy G. Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD 21228; and Insect Neurobiology and Hormone Laboratory, USDA-ARS aut NATIONALLICENCE 700 1- Lopez Juan D. Areawide Pest Management Research Unit, USDA-ARS, 2771 F & B Road, College Station, TX 77845 aut NATIONALLICENCE 773 0- Annals of the Entomological Society of America Oxford University Press 89/3(1996-05-01), 475-480 0013-8746 89:3<475 1996 89 aesa Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford