Relative Effects of Ultraviolet and Visible Light on the Activities of Corn Earworm and Beet Armyworm (Lepidoptera: Noctuidae) Nucleopolyhedroviruses

Martin Shapiro; John Domek

doi:10.1603/0022-0493-95.2.261

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Martin Shapiro,^1,2 John Domek²

¹shapirom@ba.ars.usda.gov
²Insect Biocontrol Laboratory, USDA-ARS, Henry A. Wallace Agricultural Research Center-W, Beltsville, MD 20705

Abstract

Five different combinations of fluorescent tubes (UV-B/UV-B, UV-B/UV-A, UV-A/UV-A, UV-B/White, White/White) were used to determine relative effects of UV and visible light on the nucleopolyhedroviruses (NPV) of Helicoverpa zea and Spodoptera exigua. For both viruses, the greatest inactivation occurred with exposure to UV-B radiation. Both virus concentration and radiation exposure time influenced the rate and degree of inactivation. In the case of the UV-A/UV-A and White/White combinations inactivation occurred only with the longest exposure (24 h) and the lowest virus concentration (0.747 PIB/mm²). The NPV from H. zea was found to be more sensitive to UV radiation than the NPV from S. exigua.

Citation Download Citation

Martin Shapiro and John Domek "Relative Effects of Ultraviolet and Visible Light on the Activities of Corn Earworm and Beet Armyworm (Lepidoptera: Noctuidae) Nucleopolyhedroviruses," Journal of Economic Entomology 95(2), 261-268, (1 April 2002). https://doi.org/10.1603/0022-0493-95.2.261

Received: 22 November 2001; Accepted: 1 December 2001; Published: 1 April 2002