Persistence of Heliothis nuclear-polyhedrosis virus on cotton foliage

Bullock, H.R.

doi:10.1016/0022-2011(67)90085-7

Cited by 51 publications

(18 citation statements)

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“…Also, previous work with similar WP formulations in the absence of rain (Batista Filho et al 1992a) showed only 9% reduction of the insecticidal activity in the first 24h after application. In contrast with our observations with the WP formulation, other studies with baculoviruses demonstrated that the solar radiation, and not rain, had the most harmful effect on the activity of viral preparations (David & Gardiner 1966, Bullock 1967.…”

Section: Persistence Of the Formulations Under Field Conditionscontrasting

confidence: 99%

Stability and Persistence of Two Formulations Containing Anticarsia gemmatalis Nuclear Polyhedrovirus (AgMNPV)

Filho¹,

Alves

Augusto³

et al. 2001

Neotrop. Entomol.

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estudadas. As formulações foram armazenadas em condições ambiente e expostas à radiação ultravioleta em condições de laboratório e à radiação solar em condições de campo. A formulação pó molhável (PM) foi preparada através da impregnação da suspensão de vírus e adjuvantes em inerte mineral (Caolin). A formulação óleo emulsionável (OE) foi preparada pela mistura da suspensão do patógeno com óleo + adjuvantes. Durante 20 meses, com intervalos de 120 dias, amostras das formulações e do vírus original eram adicionadas à dieta artificial de lagartas de quarto ínstar de Anticarsia gemmatalis (Hübner). Após 20 meses de armazenamento, a formulação OE perdeu apenas 18,3% de sua atividade original, enquanto a formulação PM teve reduzida sua eficiência para 11,7% após 12 meses. Nenhuma diferença significativa foi observada para as duas formulações quando expostas à luz ultravioleta. Ambas protegeram o vírus quando comparado ao tratamento controle. Em condições de campo a formulação OE teve melhor persistência com cerca de 60% da atividade original presente após 14 dias da aplicação. Grande parte da formulação PM foi removida das folhas pela chuva. PALAVRAS-CHAVE: Insecta, nucleopoliedrovirus, armazenamento e radiação.ABSTRACT -The stability and the persistence of two AgMNPV formulations developed by the Instituto Biológico and the Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Brazil were studied. Formulations were stored in environmental conditions and exposed to ultraviolet radiation in laboratory and to solar radiation in the field. The wettable powder formulation (WP) was prepared by impregnating viral suspensions + adjuvants on inert mineral, chiefly kaolin. The emulsifiable oil formulation (EO) was prepared by mixing the pathogen suspension with corn oil + adjuvants. At 120-day intervals for 20 months, samples of formulations and the standard treatment (crude virus) kept in a laboratory cabinet were added to artificial diet fed to 4 th -instar Anticarsia gemmatalis (Hübner) larvae. After 20 months in storage, the formulation EO lost only 18.3% of its original activity, whereas the formulation WP had its efficiency reduced to 11.7% after 12 months. No significant differences between the two formulations were observed when exposed to the ultraviolet germicidal light, and both formulations protected the virus when compared to the standard treatment. Under field conditions, the EO formulation enhanced the viral persistence, with >60% of the original activity present 14 days after the application. Most of the WP formulation was removed from leaves by the rain.

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Section: Persistence Of the Formulations Under Field Conditionscontrasting

confidence: 99%

Stability and Persistence of Two Formulations Containing Anticarsia gemmatalis Nuclear Polyhedrovirus (AgMNPV)

Filho¹,

Alves

Augusto³

et al. 2001

Neotrop. Entomol.

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“…Alternatively, Ignoffo et al (1997) observed that HzSNPV did not wash from soybean leaves after simulated rain (1.25 cm in 30 s). Similar results were reported for HzSNPV on cotton leaves after a natural rain (Bullock, 1967) and PbGV exposed to either simulated rainfall or detergent-water rinse (David and Gardiner, 1966).…”

Section: 32supporting

confidence: 86%

“…A field application study by Glen and Payne (1984) showed CpGV virus activity was reduced in half after 3 days' exposure to natural light with some activity persisting up to 4-8 weeks. Bullock (1967) reported HzSNPV retained little activity 2 days after application on cotton. Similar findings on cotton were reported by Ignoffo and Batzer (1971) and Yearian and Young (1974), on soybean foliage by Ignoffo et al (1974), and on corn silk by Ignoffo et al (1973).…”

Section: 12mentioning

confidence: 92%

“…On plants, the effect of sunlight is greatly influenced by two main factors, (1) crop architecture, and (2) the position of virus on the plant. Studies have found HzSNPV on the adaxial surface of cotton leaves in the field have become inactive after three days (Bullock, 1967). Ignoffo et al (1973) assessed the stability of HzSNPV on corn silks and reported virus activation up to 24 days, though significantly less activity than reported for activated carbon stabilized virus.…”

Section: 2mentioning

confidence: 99%

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Review of Vaccinia Virus and Baculovirus Viability Versus Virucides

Buckley¹,

O’Connell²,

Ouellette³

2008

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“…The primary factor responsible for inactivation under field conditions has been demonstrated to be the ultraviolet (UV) radiation from the sunlight in the spectral range of 250 to 320 nm and loss of efficacy is the most striking feature of the action of UV irradiation on virions [5,6].…”

Section: Constrain In Usage Of Biopesticidesmentioning

confidence: 99%

HaNPV Persistence Improvement using UV Protectants and Adjuvants

Kanara¹

2017

APAR

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HaNPV alone only causes lower larval mortality. However, in combination with adjuvants increases the larval mortality acting as gustatory or phago-stimulant, whereas, UV protectants increase the stability and longer persistence of HaNPV in field conditions. Boric acid and folic acid acts dual role of adjuvant and UV protectant. HaNPV in combination with UV protectants and adjuvants is more effective than HaNPV alone under field conditions. It is also clear that spray can be taken up during evening hours to prevent exposure of HaNPV directly to sunlight and evaporation, which also helps in longer residual of HaNPV in field.Citation: Divya C, Kanara HG, Jethva DM (2017) HaNPV Persistence Improvement using UV Protectants and Adjuvants. Adv Plants Agric Res 6(2): 00206.

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Persistence of Heliothis nuclear-polyhedrosis virus on cotton foliage

Cited by 51 publications

References 0 publications

Stability and Persistence of Two Formulations Containing Anticarsia gemmatalis Nuclear Polyhedrovirus (AgMNPV)

Stability and Persistence of Two Formulations Containing Anticarsia gemmatalis Nuclear Polyhedrovirus (AgMNPV)

Review of Vaccinia Virus and Baculovirus Viability Versus Virucides

HaNPV Persistence Improvement using UV Protectants and Adjuvants

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