Inactivation of Representative Species of Entomopathogenic Viruses, a Bacterium, Fungus, and Protozoan by an Ultraviolet Light Source

Ignoffo, Carlo M.; Hostetter, D. L.; Sikorowski, P. P.; Sutter, G. R.; Brooks, Wayne M.

doi:10.1093/ee/6.3.411

Cited by 132 publications

(54 citation statements)

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“…Due to their high specificity and virulence, a number of baculoviruses are used as biological insecticides world-wide (Hunter-Fujita, 1998;Moscardi, 1999). However, one of the most important factors that limits baculovirus efficacy is their susceptibility to ultraviolet (UV) light (Ignoffo et al ., 1977). Sensitivity to UV light has motivated studies on the use of adjuvants in baculovirus formulations that can improve the insecticide activity and persistence in the field (Shapiro et al ., 1987;Tamez-Guerra et al ., 2000;McGuire et al ., 2001;Castillejos et al ., 2002).…”

Section: Introductionmentioning

confidence: 99%

Effects of an optical brightener on the development, body weight and sex ratio ofSpodoptera frugiperda(Lepidoptera: Noctuidae)

Martínez¹,

Caballero²,

Williams³

2004

Biocontrol Science and Technology

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The incorporation of stilbene-derived optical brighteners into baculovirus formulations can substantially enhance virus infectivity and persistence of inoculum in the field. We evaluated the effect of the optical brightener Tinopal UNPA-GX (Sigma Chemical Co.) on the weight, development time, adult emergence and sex ratio of the principal pest of maize in the Americas, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae). Tinopal UNPA-GX was incorporated into semi-synthetic diet at a final concentration of 0.1 or 0.05% (w/v) and larvae of S. frugiperda were individually reared on the Tinopal-treated or an untreated control diet. In both Tinopal treatments, the weights of larvae and pupae were significantly reduced by up to 36 and 13%, respectively. The duration of larval development was increased by up to 30% compared to the controls. Adult emergence was high in all treatments (:/90%) and was not affected by the presence of Tinopal in the diet. Significant differences in the proportion of adult females were observed in the 0.05% Tinopal treatment but not in the control or 0.1% Tinopal treatments. By affecting the integrity of the peritrophic membrane and the rate of sloughing of intestinal epithelial cells, natural pest populations exposed to optical brightener residues from bioinsecticide applications are likely to suffer a reduction in growth rate and other correlates of insect fitness.

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Section: Introductionmentioning

confidence: 99%

Effects of an optical brightener on the development, body weight and sex ratio ofSpodoptera frugiperda(Lepidoptera: Noctuidae)

Martínez¹,

Caballero²,

Williams³

2004

Biocontrol Science and Technology

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“…Néanmoins, sauf quelques rares exceptions (Leong et al, 1980 ; Burges, 1981 ;Benz, 1987), la plupart des travaux ont été consacrés à l'analyse de ses effets en conditions expérimentales (Burges et al, 1975 ;Ignoffo et al, 1977 ;Krieg et al, 1980 ;Zimmermann, 1982 ;Carruthers et al, 1988 (Carruthers et al, 1988 ;Stevenson et Pennypacker, 1988 …”

Section: Introductionunclassified

Mise au point d'un dispositif d'étude des effets du rayonnement sur la persistance des micro-organismes pathogènes

et al. 1994

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rayonnement / température / micro-organismes / dispositif d'irradiation / persistance Summary — A device for studying the effects of radiation on the persistence of pathogenic microorganisms. A system was devised for separate analysis of the photic effect and the thermal effect of solar radiation on the persistence of pathogenic microorganisms under both artificial and natural light. The objective of the authors was also to investigate these effects in varying waveband and irradiance. The irradiation chambers consisted of controlled-environment incubators with 2 high-pressure metallic halogen lamps (400 W) irradiating a large temperature-controlled platform (3 600 cm 2 ). The light quality was modified by using 2 long pass glass filters. In using a 295 nm cutting filter, the UVB irradiance ranged from 1.6 to 0.4 W.m -2 according to the distance from the source to the target plane. At 1.50 m distance the gradient of distribution of UVB irradiance on the target surface was less than 12%. The thermal gradient did not exceed 5%. The difference between the target temperature and the measured temperature at the sample surface support was less than 1°C. The relative humidity remained stable around 60% during the inoculum exposure. The device has been adapted for studies in 'semi-field' conditions (constant temperature for the support of inoculum and solar radiation).

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“…Ignoffo et al (1977) estimated a half life of 2 hr for Pieris rapae Granulovirus (PrGV) and Helicoverpa spp. NPV exposed to UV lamps.…”

Section: 12mentioning

confidence: 99%

Review of Vaccinia Virus and Baculovirus Viability Versus Virucides

Buckley¹,

O’Connell²,

Ouellette³

2008

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Inactivation of Representative Species of Entomopathogenic Viruses, a Bacterium, Fungus, and Protozoan by an Ultraviolet Light Source

Cited by 132 publications

References 0 publications

Effects of an optical brightener on the development, body weight and sex ratio ofSpodoptera frugiperda(Lepidoptera: Noctuidae)

Effects of an optical brightener on the development, body weight and sex ratio ofSpodoptera frugiperda(Lepidoptera: Noctuidae)

Mise au point d'un dispositif d'étude des effets du rayonnement sur la persistance des micro-organismes pathogènes

Review of Vaccinia Virus and Baculovirus Viability Versus Virucides

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