Effect of High Temperature and UV Radiation on the Insecticidal Capacity of a Spodoptera frugiperda Nucleopolyhedrovirus Microencapsulated in a Matrix Based on Oxidized Corn Starch

Bustillos-Rodríguez, Juan Carlos; Ordóñez-García, Magali; Ornelas‐Paz, José de Jesús; Sepúlveda-Ahumada, David Roberto; Zamudio‐Flores, Paul Baruk; Acosta-Muñíz, Carlos H.; Gallegos‐Morales, Gabriel; Reyes, David; Rios-Velasco, Claudio

doi:10.1007/s13744-022-01016-y

Neotrop Entomol

2023

DOI: 10.1007/s13744-022-01016-y

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Effect of High Temperature and UV Radiation on the Insecticidal Capacity of a Spodoptera frugiperda Nucleopolyhedrovirus Microencapsulated in a Matrix Based on Oxidized Corn Starch

Juan Carlos Bustillos-Rodríguez

Magali Ordóñez-García

José de Jesús Ornelas‐Paz

et al.

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Cited by 3 publications

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Morphological, Biological, and Molecular Characterization of Type I Granuloviruses of Spodoptera frugiperda

Ordóñez-García,

Bustillos-Rodríguez,

de Jesús Ornelas-Paz

et al. 2024

Neotrop Entomol

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The granuloviruses or GVs (Betabaculovirus) associated with the fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), especially those of Type I, have scarcely been studied but they might represent an alternative for the biocontrol of this insect. In this study, the native granuloviruses SfGV-CH13 and SfGV-CH28 isolated from FAW larvae were characterized for morphology, molecular traits, and insecticidal activity. The elapsed time between symptomatic infection of larvae and stop feeding as well as the weight of larvae before death or prior to pupation were also evaluated. Both granuloviruses isolates showed ovoid shape with a length of 0.4 µm. They showed the same DNA restriction pro les and their genome sizes were about 126 kb. The symptomatic infection with tested GVs mainly caused accidity of larva body and discoloration of integument. The integument lysis was only observed in 8% of infected larvae. Infected larvae gradually stopped feeding. Overall, these symptoms are characteristic of infections caused by Type I granuloviruses, which are known as monoorganotropic or slow-killing. The median lethal doses (LD 50 ) values for SfGV-CH13 and SfGV-CH28 isolates were 5.4 × 10 2 and 1.1 × 10 3 OBs/larva, respectively. The median lethal time (LT 50 ) ranged from 17 to 24 d. LT 50 values decreased as the viral dose was increased. The elapsed time since symptomatic infection until pupation (LD 50 ) and body weight of larvae (third instar) were higher with SfGV-CH28 than SfGV-CH13. Both granulovirus isolates were able to kill the FAW larvae from the 12th day.

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Morphological, Biological, and Molecular Characterization of Type I Granuloviruses of Spodoptera frugiperda

Ordóñez-García,

Bustillos-Rodríguez,

de Jesús Ornelas-Paz

et al. 2024

Neotrop Entomol

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A novel Helicoverpa armigera Nucleopolyhedrovirus (HearNPV-IR18 isolate) formulation on hemocyte cultures of cotton bollworm (Helicoverpa armigera Hübner)

Valizadeh,

Afrazeh,

Sendi

2024

Journal of Asia-Pacific Entomology

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Soil as an Environmental Reservoir for Baculoviruses: Persistence, Dispersal and Role in Pest Control

Williams

2023

Soil Systems

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Baculoviruses are DNA viruses that can naturally control insects and form the basis for a range of biological insecticides. These viruses are occluded in a crystalline protein matrix, the occlusion body (OB), which favors their persistence in the environment until consumed by a susceptible insect. This review presents evidence that baculoviruses are perfectly adapted to persist in soil. In support of this assertion, detailed evidence is presented concerning the stability of virus OBs in soil, the mechanisms and processes that affect OB transport to soil, OB persistence and movement through the soil layers, and the transport of the virus back to the host’s foodplant for subsequent transmission. The soil reservoir interacts with the host insect, the foodplant and the biotic and abiotic factors in the environment, all of which influence the function of the soil OB reservoir. Agricultural practices that conserve the soil reservoir can result in improved pest control. The soil is also an overlooked source of genetic diversity for the design of baculovirus-based insecticides. Finally, the principal issues that remain to be elucidated are highlighted, particularly with reference to those that affect the soil–baculovirus relationship and the impact of the soil OB reservoir on insect populations.

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Effect of High Temperature and UV Radiation on the Insecticidal Capacity of a Spodoptera frugiperda Nucleopolyhedrovirus Microencapsulated in a Matrix Based on Oxidized Corn Starch

Cited by 3 publications

References 56 publications

Morphological, Biological, and Molecular Characterization of Type I Granuloviruses of Spodoptera frugiperda

Morphological, Biological, and Molecular Characterization of Type I Granuloviruses of Spodoptera frugiperda

A novel Helicoverpa armigera Nucleopolyhedrovirus (HearNPV-IR18 isolate) formulation on hemocyte cultures of cotton bollworm (Helicoverpa armigera Hübner)

Soil as an Environmental Reservoir for Baculoviruses: Persistence, Dispersal and Role in Pest Control

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