Abstract
The goal of this study was to document the susceptibility of Anticarsia gemmatalis Hubner, Helicoverpa zea Boddie, Chrysodeixis includens Walker, Spodoptera exigua Hubner, and Spodoptera frugiperda J.E. Smith to a field-collected isolate of nuclear polyhedrosis virus from Anticarsia gemmatalis (AgNPV). Eight concentrations of AgNPV were individually provided in an artificial diet, and larvae of each species could feed on each virus concentration for 15 days, which allowed us to calculate the Median Lethal Concentration (LC50) of the virus for each insect species. The larvae of S. frugiperda were not susceptible to the virus, whereas the LC50 for A. gemmatalis, C. includens, S. exigua, and H. zea were 0.5 × 103, 0.20 × 108, 2.68 × 108, and 8.3 × 108 inclusion bodies/mL, respectively.
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