Phagocytosis by blood cells in healthy and diseased caterpillars III. Some observations concerning virus inclusion bodies

Wittig, Gertraude

doi:10.1016/0022-2011(68)90078-5

Cited by 18 publications

(2 citation statements)

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“…Whether the involvement of haemocytes in phagocytosis, encapsulation and apoptosis results in net losses of haemocytes has not been documented. However, declines in haemocyte numbers over the course of baculovirus infection in lepidopteran hosts have been reported (Shapiro et al, 1969;Wittig, 1968) and we have also observed similar declines in haemocyte density in T. ni challenged by its species specific baculovirus (T. ni SNPV), and this effect was greater at higher viral doses (Scholefield et al, manuscript in preparation). It is possible that ingesting a higher protein diet may allow T. ni to compensate for haemocytes lost during a cellular immune response against AcMNPV.…”

Section: Discussionsupporting

confidence: 84%

Baculovirus-challenge and poor nutrition inflict within-generation fitness costs without triggering transgenerational immune priming

Shikano

Hua

Cory

2016

Journal of Invertebrate Pathology

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Section: Discussionsupporting

confidence: 84%

Baculovirus-challenge and poor nutrition inflict within-generation fitness costs without triggering transgenerational immune priming

Shikano

Hua

Cory

2016

Journal of Invertebrate Pathology

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“…Drástica redução no número de hemócitos durante infecções microbianas foi relatada por várias pesquisas (RATCLIFFE;WALTERS, 1983;BALAVENKATASUBBAIAH et al, 2001;, embora o oposto também foi observado por KALIA et al (2001). No presente trabalho, foi demonstrado que lagartas de P. (WITTIG, 1968). Hemócitos circulantes desempenham papel-chave na prevenção da disseminação da infecção em lagartas (WASHBURN et al, 1996;CHAPMAN, 1998), e uma redução em seu número pode resultar em aumento da suscetibilidade do hospedeiro à progressão da infecção viral.…”

Section: Determinação Do Equivalente Larval (El) a Partir De Lagartasunclassified

Controle microbiano da traça-da-batata, Phthorimaea operculella (Zeller, 1873) (Lepidoptera:Gelechiidae), com granulovírus

Mascarin¹

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Microbial control of the potato tuber moth, Phthorimaea operculella (Zeller, 1873) (Lepidoptera: Gelechiidae), using a granulovirus The Potato Tuber Moth (PTM), Phthorimaea operculella (Zeller, 1873) (Lepidoptera: Gelechiidae), is a major pest of potato causing up to 100% damage worldwide, especially under storage conditions. The use of chemical pesticides to control PTM usually increases production costs, generates toxic residues and farmer intoxications. Biological control is a desired alternative to be incorporated in Integrated Pest Management (IPM) programs. The granulovirus, PhopGV (Baculoviridae) is one of the most important natural enemies of PTM, frequently causing epizootics in host populations. The current research focused on basic studies to evaluate the potential of PhopGV to control PTM at different incubation temperatures (18, 24 e 30 °C) on potato tuber and on foliage. Investigations about virus persistence were done for treated tubers, and side-effects due to viral infection were assessed on pupal weight and immune system of PTM larvae. The susceptibility of a related host, the tomato pinworm, Tuta absoluta (Meyrick, 1917) (Lepid.: Gelechiidae), to the virus was also investigated on tomato leaves (Solanum lycopersium L., Solanaceae). In order to improve larval mortality by the pathogen, the virus was tested at different concentrations in combination with two neem products (DalNeem ® and NeemAZAl ®), and PhopGV was also tested in talc dust formulation. All tested temperatures did not affect the susceptibility of PTM larvae to PhopGV, neither the yield of infected larvae nor the rate of larvae not recovered on tuber bioassays. These parameters were highly dependent on the virus concentration and concentrations > 1 x 10 6 OB.mL-1 resulted in 100% larval mortality. Although the yield of infected larvae did not vary among the temperatures, the incubation period until the harvest of these larvae was shorter at 30 °C. On potato foliage, PTM larvae were less susceptible to the virus than on tubers, indicating that different virus dosages must be used for applications in field and storage conditions. The pathogen showed high persistence resulting in more than 80% larval mortality 60 days post-treatment. The transmission of the virus from larva to pupa at lower virus inoculum (< 1 x 10 6 OB.mL-1) was confirmed. However, the infected pupae had similar weights to those healthy ones. Infected larvae presented much lower densities of haemocytes compared to uninfected larvae. The best combination of PhopGV and neem products was achieved by the mixture of 4 ppm DalNeem with 1 x 10 4 OB.mL-1 PhopGV, which resulted in higher PTM mortalities than both agents applied alone. NeemAzal had antagonistic effect when mixed with PhopGV resulting on reduced larval mortality. The talc dust formulation of virus promoted higher mortalities (> 70%) at concentrations < 5 x 10 6 OB.mL-1 than to nonformulated virus. PhopGV can be produced in vivo on potato tubers at 24-30 °C, and the use of this virus in combination with talc or D...

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Haemocytes and Their Population

Bahadur¹

1993

Insect Immunity

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Phagocytosis by blood cells in healthy and diseased caterpillars III. Some observations concerning virus inclusion bodies

Cited by 18 publications

References 9 publications

Baculovirus-challenge and poor nutrition inflict within-generation fitness costs without triggering transgenerational immune priming

Baculovirus-challenge and poor nutrition inflict within-generation fitness costs without triggering transgenerational immune priming

Controle microbiano da traça-da-batata, Phthorimaea operculella (Zeller, 1873) (Lepidoptera:Gelechiidae), com granulovírus

Haemocytes and Their Population

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