Is It Feasible to Use Optical Brightener Technology with a Baculovirus Bioinsecticide for Resource-Poor Maize Farmers in Mesoamerica?

Martínez, Amós; Goulson, Dave; Chapman, Jason W.; Caballero, Primitivo; Cave, Ronald D.; Williams, Trevor

doi:10.1006/bcon.1999.0786

Cited by 36 publications

(24 citation statements)

References 27 publications

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“…Natural parasitism contributed an average of 20-23% mortality and was not significantly affected by virus application rate or the interval between application and sampling. A lack of correlation between virus mortality and parasitism was reported previously in a simple analysis of the efficacy of spray applications of SfMNPV for S. frugiperda control in field trials performed in Mexico and Honduras (Mart ı ınez et al, 2000). Virus application, however, caused a significant decrease in the prevalence of parasitoid emergence in the field experiment on the quantity of granule applications.…”

Section: Discussionmentioning

confidence: 70%

“…The results of three of the spray trials (Mart ı ınez et al, 2000;Williams et al, 1999) and one of the granule trials (Cisneros et al, 2002b) have been published previously, whereas the remainder represent unpublished studies. All the trials were performed in the southern States of Chiapas and Oaxaca, Mexico using a number of locally grown maize varieties in the mid-to late-whorl stages.…”

Section: Comparison Of Spray and Phagostimulant Formulationsmentioning

confidence: 99%

“…Spray application of 1:5 Â 10 12 OBs/ha typically results in 40% infection of S. frugiperda larvae collected at 2 days postapplication and reared in the laboratory (Mart ı ınez et al, 2000), with natural parasitism contributing an additional 20% to pest mortality. Our present study, therefore, is designed to evaluate the feasibility of formulating the multiple nucleopolyhedrovirus of S. frugiperda (SfMNPV) as phagostimulant granules for improved control of this pest in maize.…”

Section: Introductionmentioning

confidence: 99%

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Granular phagostimulant nucleopolyhedrovirus formulations for control of Spodoptera frugiperda in maize

et al. 2002

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The efficacy of bioinsecticides that act by ingestion can be improved by the use of phagostimulant formulations that increase the consumption of the pathogen. A granule recipe comprising of pregelatinized flour, starch, ground maize cob, maize oil, and water was identified that was highly palatable to Spodoptera frugiperda larvae. To compare the performance of a multiple nucleopolyhedrovirus (SfMNPV) in aqueous spray and phagostimulant granules, multiple linear regression procedures were employed to analyze the results of seven independent field trials involving spray applications and eight independent field trials involving application of phagostimulant granules for control of S. frugiperda in maize. Prevalence of infection was positively correlated with the quantity of inoculum applied but negatively correlated with the interval between application and sampling of larvae for both granular and spray formulations. Virus-induced mortality was greater when inoculum was applied in granular than in spray formulation. A field experiment involving the application of 1:5 Â 10 12 occlusion bodies (OBs)/ha in quantities of 6, 18, and 32 kg granules/ha indicated that the quantity of granules applied did not significantly affect viral mortality at any timepoint. Persistence of activity of viral inoculum applied in spray or granular formulations was significantly greater when applied in the granular formulation, with approximately 23% of the original activity remaining at 8 days postapplication compared to <1% in the spray-treated plants. We conclude that the efficacy of SfMNPV was improved by formulation; the granular formulation caused a higher prevalence of infection in S. frugiperda larvae and persisted longer on crop foliage compared to an aqueous spray application. The cost of the formulation ingredients alone was approximately US$0.50/kg. When combined with the virus, the cost of the basic bioinsecticide components would be about US$17/ha, although this estimate does not include additional costs involved in the commercialization of a potential bioinsecticide product. Ó

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Section: Discussionmentioning

confidence: 70%

Section: Comparison Of Spray and Phagostimulant Formulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Granular phagostimulant nucleopolyhedrovirus formulations for control of Spodoptera frugiperda in maize

et al. 2002

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“…For most baculoviruses, commercialization is limited because of adverse characteristics such as high cost of production, slow speed of kill, and short field persistence, making them an expensive control tactic (Cross et al, 1999). In vitro (de Almeida et al, 2010;Da Silva Pedrini et al, 2004) and in vivo (Martínez et al, 2000;Simón et al, 2008) techniques are known for baculovirus production for biopesticide application, though both are generally expensive when compared with production of chemical pesticides. Due to the slow speed of kill, pest mortality may not occur until several days after exposure to treatment, allowing additional damage to the crop (Vasconcelos et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Laboratory and field evaluations of the efficacy of a fast-killing baculovirus isolate from Spodoptera frugiperda

Behle

Popham

2012

Journal of Invertebrate Pathology

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“…Hymenopteran parasitoids are common and represent a significant factor of mortality in populations of S. frugiperda in maize, with a prevalence of parasitism typically between 15 and 30% (Mart ı ınez et al, 2000;Wheeler et al, 1989). We therefore set out to study the relationship between the IIV isolated from S. frugiperda larvae and the solitary ichneumonid endoparasitoid Eiphosoma vitticolle Cresson which is commonly found parasitizing Spodoptera spp.…”

Section: Introductionmentioning

confidence: 99%

Parasitoid-mediated transmission of an iridescent virus

López

Rojas

Vandame

et al. 2002

Journal of Invertebrate Pathology

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We examined the interaction between an invertebrate iridescent virus (IIV) isolated from Spodoptera frugiperda (J.E. Smith) and the solitary ichneumonid endoparasitoid Eiphosoma vitticolle Cresson. In choice tests, parasitoids examined and stung significantly more virus infected than healthy larvae, apparently due to a lack of defense reaction in virus infected hosts. Parasitoid-mediated virus transmission was observed in 100% of the female parasitoids that stung a virus infected host in the laboratory. Each female parasitoid transmitted the virus to an average (AESE) of 3:7 AE 0:3 larvae immediately after stinging an infected larva. Caged field experiments supported this result; virus transmission to healthy larvae only occurred in cages containing infected hosts (as inoculum) and parasitoids (as vectors). The virus was highly detrimental to parasitoid development because of premature host death and lethal infection of the developing endoparasitoid. Female parasitoids that emerged from virus infected hosts did not transmit the virus to healthy hosts. We suggest that the polyphagous habits of many noctuid parasitoids combined with the catholic host range of most IIVs may represent a mechanism for the transmission of IIVs between different host species in the field.

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Is It Feasible to Use Optical Brightener Technology with a Baculovirus Bioinsecticide for Resource-Poor Maize Farmers in Mesoamerica?

Cited by 36 publications

References 27 publications

Granular phagostimulant nucleopolyhedrovirus formulations for control of Spodoptera frugiperda in maize

Granular phagostimulant nucleopolyhedrovirus formulations for control of Spodoptera frugiperda in maize

Laboratory and field evaluations of the efficacy of a fast-killing baculovirus isolate from Spodoptera frugiperda

Parasitoid-mediated transmission of an iridescent virus

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