Importance of epizootiology to biological control of insects with viruses

Fuxa, James R.

doi:10.1590/s0074-02761989000700017

Cited by 7 publications

(3 citation statements)

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“…NPVs persist on host plants only a short time, within which the virus must be ingested by a new host. NPVs generally persist only 1-32 days on surfaces of vegetation (Fuxa, 1989), although the viral population can persist for longer times in trees (Young, 2001). Exposure to UV irradiation resulted in substantial inactivation of the virus.…”

Section: Environmental Factors Affecting In Persistence Of Viruses In Fieldmentioning

confidence: 99%

Sodium Taurocholate as Novel Additive: A Right Choice for Ornamental Fish Feed

Daniel¹

2016

Int. J. Curr. Res. Biosci. Plant Biol.

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The various impact of using chemical insecticides in agriculture has been experienced with several facts like contamination of environment; effects in human health and impact in relation to insect pests consist of effect on non target pests, development of insecticide resistance to insect pests, secondary pest's outbreak and resurgence of pest populations. So, development of alternatives to chemical insecticides has been an important action in managing pests for promoting a sustainable agriculture. Microbial biopesticides acts as a solution as they are environmentally safe, self perpetuating in nature, specific to target pests etc. Among the microbial biopesticides, viruses after bacterial and fungal products occupy a special space in managing several pests. NPV forming polyhedra like occlusion bodies kills most important crop pests such as Helicoverpa armigera and Spodoptera litura. NPV can be implemented as one of major component in IPM programme. So, reduction of application of broad-spectrum pesticides increases the potentiality of implementing NPV in IPM programme and allow to the build-up of natural enemies in crop ecosystem.

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Section: Environmental Factors Affecting In Persistence Of Viruses In Fieldmentioning

confidence: 99%

Sodium Taurocholate as Novel Additive: A Right Choice for Ornamental Fish Feed

Daniel¹

2016

Int. J. Curr. Res. Biosci. Plant Biol.

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“…HearNPV can be applied using conventional pesticide application equipment and is commercially available as Heligen ® (Agbitech LLC., Ft. Worth, TX, USA), Gemstar ® (Certis USA LLC., Columbia, MD, USA), or Helicovex ® (Corteva Agriscience, Wilmington, DE, USA). Nucleopolyhedrovirus formulations are relatively inexpensive compared with many of the synthetic insecticides, have no known off-target effects, and have the potential to induce epizootic events through horizontal transmission [3][4][5][6]. However, NPVs take a longer time to induce mortality, relative to conventional insecticides, and tend to suppress, not eradicate, the local pest population.…”

Section: Introductionmentioning

confidence: 99%

“…Horizontal transmission is an important factor in the efficacy of HearNPV as an insecticide, as it is a critical part of inducing epizootic events [3,4]. Along with increasing viral infections in a localized area, horizontal transmission of HearNPV may lead to viral infection of subsequent infestations [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Helicoverpa Armigera Nucleopolyhedrovirus on Soybean for Control of Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) in Arkansas Agriculture

Black

Lorenz²,

Cato

et al. 2022

Insects

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Helicoverpa armigera nucleopolyhedrovirus (HearNPV) is a naturally occurring virus commercially produced for control of Heliothines, including Helicoverpa zea. One drawback with using this virus for control has been the slower time to mortality compared with synthetic insecticides. However, a new formulation (Heligen®) has anecdotally been thought to result in quicker mortality than previously observed. The objective of this study was to evaluate percent defoliation, the efficacy of HearNPV on mortality for each H. zea larval instar, and the potential for control of a second infestation. Fourteen days after the first infestation, all plants were re-infested with a second instar larva to simulate a second infestation. Helicoverpa armigera nucleopolyhedrovirus was effective at killing 1st–3rd instars, resulting in 99% mortality over 4–6 days. However, 4th and 5th instar mortality only reached 35%. Second infestation larvae died between 3.4 and 3.8 days, significantly faster than the 1st infestation of 2nd instars, which had a mean time to mortality of 4.9 days. An increase in mortality rate is probably due to increasing viral concentrations after viral replication within the first hosts. Final defoliation percentages were significantly smaller in the treated plants versus the untreated plants. Only 3rd and 4th instar larvae caused percent defoliation to exceed the current Arkansas action threshold of 40%. Helicoverpa armigera nucleopolyhedrovirus in the Heligen formulation can control 1st–3rd instars within 4–6 days, while keeping defoliation below the action threshold of 40%.

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Effect of Agricultural Operations and Precipitation on Vertical Distribution of a Nuclear Polyhedrosis Virus in Soil

Fuxa

Richter

1996

Biological Control

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Importance of epizootiology to biological control of insects with viruses

Cited by 7 publications

References 0 publications

Sodium Taurocholate as Novel Additive: A Right Choice for Ornamental Fish Feed

Sodium Taurocholate as Novel Additive: A Right Choice for Ornamental Fish Feed

Efficacy of Helicoverpa Armigera Nucleopolyhedrovirus on Soybean for Control of Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) in Arkansas Agriculture

Effect of Agricultural Operations and Precipitation on Vertical Distribution of a Nuclear Polyhedrosis Virus in Soil

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