Influence of virus inoculation method and host larval age on productivity of the nucleopolyhedrovirus of the teak defoliator, Hyblaea puera (Cramer)

Biji, C. P.; Sudheendrakumar, V. V.; Sajeev, T. V.

doi:10.1016/j.jviromet.2005.11.003

Cited by 6 publications

(4 citation statements)

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“…Jun et al (2007) reported that the volume of POBs of SlMNPV harvested on the 5th day of the postinoculation period was significantly lower than that harvested on the 7th day of the post-incubation period which was significantly lower than that harvested after larval death, and a similar trend was observed in biological activity by dosing the fifth instar larvae. To study the influence of virus inoculation method and host larval age on the productivity of the NPV of the teak defoliator, Hyblaea puera (Cramer) was determined by different methods of inoculation (Biji et al 2006).…”

Section: In Vivo Mass Productionmentioning

confidence: 99%

Role of Nucleopolyhedroviruses (NPVs) in the Management of Lepidopteran Pests in Asia

et al. 2015

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Section: In Vivo Mass Productionmentioning

confidence: 99%

Role of Nucleopolyhedroviruses (NPVs) in the Management of Lepidopteran Pests in Asia

et al. 2015

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“…The multiplication rate of HpNPV is fairly typical for this type of baculovirus, and it depends on the initial dose rate, the development stage of the larval host and the time post-infection (Fig. 8.15) (Biji et al, 2006). The number of PIBs per larva produced in a field mass production system averaged around 5 × 10 8 at death (Sudheendrakumar et al, 2004).…”

Section: Biological Control Using Virusesmentioning

confidence: 99%

Insect pests in tropical forestry

2013

Choice Reviews Online

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Since the publication of the first edition of this book in 2001, there have been several significant developments in forestry and forest entomology in the tropics that warranted inclusion in a second edition. One is the emergence of new pest species associated either with the expansion of plantation forestry into new regions or marginal areas, or a gradual adaptation by indigenous species to exotic hosts or the rapid spread of new invasives. The South American carpenterworm, Chilecomadia valdiviana, in Chile, and the South African goat moth, Coryphodema tristis, are examples of emerging indigenous pests associated with the establishment and expansion of exotic Eucalyptus spp. plantations in these countries. The blue gum chalcid, Leptocybe invasa, and the erythrina gall wasp, Quadrastichus erythrinae, are recent examples of the rapid worldwide spread of an invasive insect, similar to that which occurred for the leucaena psyllid, Heteropsylla cubana, in the 1980s and 1990s. The biology, ecology and impact of these, and many additional pest species, are discussed in an expanded Chapter 5.Another development has been the growing awareness of the 'true' global impact of forest invasive species as losses have been better quantified. Damage worldwide has been estimated at several billion US dollars per year, even without taking into account the loss of non-market value, which may well exceed that figure. This has prompted a range of international responses, including the formation of networks and surveillance programmes to provide early warning of incursions of forest invasives and the development of international standards for phytosanitary measures, such as that for wood packaging material, as discussed in Chapter 9. The global increase in self-help schemes such as plant clinics and field schools is also discussed. A range of new technologies has enhanced the accuracy and efficiency of forest health surveys over the past decade. These include the use of geographic information system-global positioning system interface tools and handheld computers to assist navigation and data collection in the field, and the application of digital, remotely sensed imagery to detect and classify damaged forest canopies. There have also been significant advances in the use of semiochemicals, including pheromones, for the detection and monitoring of forest pests and for controlling pest populations by means of mass trapping, lure and kill, lure and infect and mating disruption.One of the fundamental principles underlying this book is that the prevention of problems is far better than attempts at cures. The book is not in any way designed to be a manual of pest management. Instead, it presents concepts and examples of tropical forest viii Preface insects, their ecology, impact and control approaches where appropriate, and we hope that individual readers will make the connection between the generalities in the book and their own situation, socio-economic position and appropriate technologies. Some situations or examples have been revisited...

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“…The different outcomes depend in part on the life stage at which infection occurs. Virus infections in larvae tend to cause lethality more often than in adults [ 3 , 4 , 5 , 6 , 7 ]. Moreover, within the different larval stages there can be variation in the resistance or susceptibility to the viral infection [ 3 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, within the different larval stages there can be variation in the resistance or susceptibility to the viral infection [ 3 , 8 ]. While the use of insect-specific viruses as biocontrol agents provides a target-specific alternative to chemical-based methods and has indeed become common practise in the agricultural field [ 9 , 10 , 11 , 12 ], the stage-specific variability in the outcome of infection can be a major challenge [ 3 , 4 , 6 , 12 ]. For example, baculoviruses often cause lethal infections when orally delivered to larvae of Lepidopteran pests, but in many cases, significant mortality is achieved only when the virus is fed to newly hatched or early-instar larvae [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Physical and Chemical Barriers in the Larval Midgut Confer Developmental Resistance to Virus Infection in Drosophila

Villegas-Ospina

Merritt

Johnson

2021

Viruses

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Insects can become lethally infected by the oral intake of a number of insect-specific viruses. Virus infection commonly occurs in larvae, given their active feeding behaviour; however, older larvae often become resistant to oral viral infections. To investigate mechanisms that contribute to resistance throughout the larval development, we orally challenged Drosophila larvae at different stages of their development with Drosophila C virus (DCV, Dicistroviridae). Here, we showed that DCV-induced mortality is highest when infection initiates early in larval development and decreases the later in development the infection occurs. We then evaluated the peritrophic matrix as an antiviral barrier within the gut using a Crystallin-deficient fly line (Crys−/−), whose PM is weakened and becomes more permeable to DCV-sized particles as the larva ages. This phenotype correlated with increasing mortality the later in development oral challenge occurred. Lastly, we tested in vitro the infectivity of DCV after incubation at pH conditions that may occur in the midgut. DCV virions were stable in a pH range between 3.0 and 10.5, but their infectivity decreased at least 100-fold below (1.0) and above (12.0) this range. We did not observe such acidic conditions in recently hatched larvae. We hypothesise that, in Drosophila larvae, the PM is essential for containing ingested virions separated from the gut epithelium, while highly acidic conditions inactivate the majority of the virions as they transit.

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Influence of virus inoculation method and host larval age on productivity of the nucleopolyhedrovirus of the teak defoliator, Hyblaea puera (Cramer)

Cited by 6 publications

References 6 publications

Role of Nucleopolyhedroviruses (NPVs) in the Management of Lepidopteran Pests in Asia

Role of Nucleopolyhedroviruses (NPVs) in the Management of Lepidopteran Pests in Asia

Insect pests in tropical forestry

Physical and Chemical Barriers in the Larval Midgut Confer Developmental Resistance to Virus Infection in Drosophila

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