Formulation with an Optical Brightener Does Not Increase Probability of Developing Resistance to Spodoptera frugiperda Nucleopolyhedrovirus in the Laboratory

Stilbene-derived optical brighteners can markedly enhance the insecticidal activity of certain baculoviruses. We evaluated the influence of an optical brightener on the rate at which Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) developed resistance to nucleopolyhedrovirus (SfMNPV). Tw...

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Bibliographic Details
Published in:Journal of economic entomology 2004-08, Vol.97 (4), p.1202-1208
Main Authors: Martínez, Ana-Mabel, Caballero, Primitivo, Villanueva, Maider, Miralles, Nagore, San Martín, Ivan, López, Estíbaliz, Williams, Trevor
Format: Article
Language:English
Subjects:
Animals
baculovirus
Biological and medical sciences
BIOLOGICAL AND MICROBIAL CONTROL
Control
Fundamental and applied biological sciences. Psychology
Generalities
Nucleopolyhedrovirus - physiology
optical brightener
Pest Control, Biological - methods
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
resistance
Selection, Genetic
Spodoptera - genetics
Spodoptera - virology
Spodoptera frugiperda
Stilbenes - pharmacology
sublethal effects
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Summary:Stilbene-derived optical brighteners can markedly enhance the insecticidal activity of certain baculoviruses. We evaluated the influence of an optical brightener on the rate at which Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) developed resistance to nucleopolyhedrovirus (SfMNPV). Two laboratory colonies of S. frugiperda were inoculated with an LC50 of SfMNPV, in the absence or presence of the optical brightener Tinopal LPW (0.1%), over a period of two and 11 generations, in the first and second experiment, respectively. Compared with the initial susceptibility of the insect colony, resistance ratios of 11- and 12-fold were observed after two generations of treatment with SfMNPV + Tinopal LPW and SfMNPV alone. Similar, but variable degrees of resistance were observed in the long-term experiment with resistance ratios of 8- to 35-fold after seven to 11 generations. The presence of Tinopal LPW alone, or in mixtures with SfMNPV, did not cause any systematic change in insect resistance in either experiment. At the end of the long-term experiment, debilitating effects on pupal weight, adult fecundity, and longevity were observed in the insects exposed to Tinopal LPW alone or in mixtures with SfMNPV, but the pattern of such effects among treatments differed in each generation. We conclude that optical brighteners are unlikely to affect the rate of development of resistance to nucleopolyhedroviruses applied as biological insecticides.
ISSN:0022-0493
1938-291X
0022-0493
DOI:10.1603/0022-0493-97.4.1202