Effect of acibenzolar-S-methyl and imidacloprid on suppression of tomato spotted wilt Tospovirus in flue-cured tobacco

Pappu, H. R.; Csinos, A. S.; McPherson, Robert M.; Jones, David C.; Stephenson, M. G.

doi:10.1016/s0261-2194(00)00028-4

Cited by 60 publications

(28 citation statements)

References 15 publications

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“…Some information is available on thrips management in tobacco (McPherson et al , 2003bPappu et al 2000;Csinos et al 2001;Groves et al 2001), but additional information is needed on the timing and use patterns of available thrips control options and their impacts on TSWV infection. Therefore, this study was conducted to examine the effects of insecticide imidacloprid and plant activator acibenzolar-S-methyl combinations and application timings on thrips population densities, TSWV infection, and plant growth and development on ßue-cured tobacco.…”

mentioning

confidence: 99%

Impact of Early-Season Thrips Management on Reducing the Risks of Spotted Wilt Virus and Suppressing Aphid Populations in Flue-Cured Tobacco

McPherson

Stephenson

LaHue

et al. 2005

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The influence of tray drench (TD) treatments, with and without foliar applications of the plant activator acibenzolar-S-methyl (Actigard), was examined in replicated field plots in 2000--2002. TD treatments of Actigard, imidacloprid (Admire), and these two products combined had little effect on seasonal mean thrips populations; however, thrips densities were lower in the Admire-treated plots at 4 and 5 wk after transplanting. Actigard and Admire TD treatments significantly reduced the seasonal incidence of tomato spotted wilt virus (TSWV) symptomatic plants in 2 yr in the study. The combination of both products was better in reducing TSWV than Actigard alone. Three early-season foliar sprays of Actigard had no effect on thrips population densities, but they did reduce TSWV incidence. The tobacco thrips, Frankliniella fusca (Hinds), comprised 92-95% of the thrips complex each year. Other thrips collected on tobacco foliage at very low densities included Haplothrips spp., Chirothrips spp., Limothrips cerealium (Haliday), other Frankliniella spp. and other unidentified species. Using nonstructural TSWV protein enzyme-linked immunosorbent assay, 1.5-2.3% of the F. fusca tested positive for nonstructural TSWV protein. Cured yields were higher in the TD treatments and the Actigard foliar treatments in the years with high TSWV in the untreated plots. The TD treatments and foliar Actigard had little impact on plant height or grade index; however, TD treatments with Admire had low tobacco aphid, Myzus nicotianae Blackman, populations through 10 wk after transplanting. The early-season Actigard and Admire treatment options are management decisions that can effectively reduce the risks of TSWV incidence in flue-cured tobacco.

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mentioning

confidence: 99%

Impact of Early-Season Thrips Management on Reducing the Risks of Spotted Wilt Virus and Suppressing Aphid Populations in Flue-Cured Tobacco

McPherson

Stephenson

LaHue

et al. 2005

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“…Therefore, the incidence of TSWV at an economically damaging level and extremely severe symptoms represented serious threat for tobacco in Serbia, as it was reported for many tobacco-growing regions in the world. TSWV infection was responsible for destructive epidemics in tobacco throughout USA (Pappu et al, 2000b), in Eastern Europe and Balkan countries (Chatzivassiliou et al, 2004;Hristova et al, 2001). Recent first report on TSWV in tobacco in Italy indicated its further spread in tobacco in Europe (Carrieri et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Status of tobacco viruses in Serbia and molecular characterization of tomato spotted wilt virus isolates

Stanković¹,

Bulajić²,

Vučurović³

et al. 2012

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Summary. -In a four-year survey to determine the presence and distribution of viruses in tobacco crops at 17 localities of the Vojvodina Province and Central Serbia, 380 samples were collected and analyzed by DAS-ELISA. Out of the seven viruses tested, tomato spotted wilt virus (TSWV), potato virus Y (PVY), tobacco mosaic virus (TMV), cucumber mosaic virus (CMV), and alfalfa mosaic virus (AMV) were detected in 37. 9, 33.4, 28.7, 23.9, and 15.5% of the total tested samples, respectively. TSWV was the most frequently found virus at the localities of Central Serbia, while PVY and CMV were the most frequent viruses in the Vojvodina Province. Single infections were prevalent in years 2005-2007 and the most frequent were those of PVY. A triple combination of those viruses was most frequent mixed infection type in 2008. The presence of all five detected viruses was confirmed in selected ELISA-positive samples by RT-PCR and sequencing. The comparisons of obtained virus isolate sequences with those available in NCBI, confirmed the authenticity of serologically detected viruses. Phylogenetic analysis based on partial nucleocapsid gene sequences revealed a joint clustering of Serbian, Bulgarian and Montenegrin TSWV isolates into one geographic subpopulation, which was distinct from the other subpopulation of TSWV isolates from the rest of the European countries. The high incidence of viruses in Serbian tobacco crops highlights the importance of enhancing farmers knowledge towards better implementation of control strategies for preventing serious losses.Keywords: tobacco; survey; viruses; DAS-ELISA; RT-PCR; phylogenetic analysis * Corresponding author. E-mail: branka.krstic@agrif.bg.ac.rs; fax:+381112193 659. Abbreviations: aa = amino acid; AMV = alfalfa mosaic virus; CMV = cucumber mosaic virus; MAb = monoclonal antibody; PVX = potato virus X; PVY = potato virus Y; TCSV = tomato chlorotic spot virus; TMV = tobacco mosaic virus; TRSV = tobacco ringspot virus; TSWV = tomato spotted wilt virus

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“…Actigard is a plant activator that elicits a plant defense response to provide protection from pathogens (Ruess et al 1996;Lawton et al 1996). Recently, Actigard significantly reduced the disease incidence caused by tomato spotted wilt tospovirus and the percent enzyme-linked immunosorbant assay (ELISA) positive plants in flue-cured tobacco plants at all four locations tested (Pappu et al 2003). Unlike Actigard, alum and Na 2 HPO 4 seem to have a similar degree of impact in reducing the MYMV disease incidence under natural conditions.…”

Section: Archives Of Phytopathology and Plant Protection 67mentioning

confidence: 99%

Effect of biocontrol agent, plant extracts and safe chemicals in suppression ofMungbean Yellow Mosaic Virus(MYMV) in black gram (Vigna mungo)

Venkatesan

Radjacommare

Nakkeeran

et al. 2010

Archives Of Phytopathology And Plant Protection

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Pseudomonas fluorescens (Pf1), plant extract and bioactive compound treatments on induction of peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia-lyase (PAL) and accumulation of phenolics in black gram to suppress the natural incidence of Mung bean yellow mosaic bigeminivirus (MYMV) was studied. Leaf extracts of Mirabilis jalapa, Datura metel and neem (Azadirachta indica) oil provided reduced incidence of MYMV with increased yield in black gram under field conditions. The bio-compatible products actigard 1 (acibenzolar-S-methyl), disodium hydrogen phosphate and alum (aluminium potassium sulphate) also suppressed MYMV on black gram and increased yield compared with nontreated plants under field conditions. The mean disease incidence of the two field trial shows that the foliar spray of P. fluorescens and M. jalapa recorded the lowest disease incidence of 39.14 and 41.48% with yields of 718 and 716.5 kg per hectare, respectively. Induction of systemic resistance as evident from the increased accumulation of pathogenesis related (PR) proteins and other defense related compounds was observed in black gram plants following application of Pf1, plant extracts and bioactive compounds after incidence of MYMV during 30 and 45 days after planting. Black gram with these treatments exhibited a significant increase in activities of enzymes PAL, PO, PPO along with rapid and distinct accumulation of toxic phenolic compounds than the control plants. These results suggest that the enhanced activities of defense enzymes and elevated content of phenolics may contribute to the protection of black gram against MYMV. Further, the inverse correlation of reduced MYMV disease incidence with significantly high chlorophyll content and total sugar contents in Pf1, plant extract and bioactive compounds treated plants also suggest the potential of these treatments to use for managing MYMV in the field.

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Effect of acibenzolar-S-methyl and imidacloprid on suppression of tomato spotted wilt Tospovirus in flue-cured tobacco

Cited by 60 publications

References 15 publications

Impact of Early-Season Thrips Management on Reducing the Risks of Spotted Wilt Virus and Suppressing Aphid Populations in Flue-Cured Tobacco

Impact of Early-Season Thrips Management on Reducing the Risks of Spotted Wilt Virus and Suppressing Aphid Populations in Flue-Cured Tobacco

Status of tobacco viruses in Serbia and molecular characterization of tomato spotted wilt virus isolates

Effect of biocontrol agent, plant extracts and safe chemicals in suppression ofMungbean Yellow Mosaic Virus(MYMV) in black gram (Vigna mungo)

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