Dosage-mortality and time-mortality responses of the armyworm Spodoptera exempta to a nuclear polyhedrosis virus.
Abstract
Third-instar larvae of Spodoptera exempta (Wlk.) were fed on young maize leaves treated with 20 mu l of polyhedral inclusion body (PIB) suspension of concentrations that varied from 1.6 X 102 to 1.6 X 109 PIBs/ml. Daily observations were made on mortality rates. A probit analysis on the results gave an LD50 of 48.4 PIB/larva (lower and upper fiducial limits 39.2 and 59.4 PIBs/larva, respectively), and an LT50 that varied from 146.2 to 221.3 h, depending on the dosage. The results show the high pathogenicity of S. exempta nuclear polyhedrosis virus for its host.
URI
http://www.cabdirect.org/abstracts/19810588032.html?resultNumber=9&q=au%3A%22Odindo%2C+M.+O.%22http://hdl.handle.net/11295/91169
Citation
Journal of Invertebrate Pathology 1981 Vol. 38 No. 2 pp. 251-255Publisher
University of Nairobi