Mealybugs and the spread of grapevine leafroll-associated virus 3 (GLRaV-3) in a New Zealand vineyard

Charles, J. G.; Froud, K.J.; Brink, R. van den; Allan, D. J.

doi:10.1071/ap09042

Cited by 72 publications

(81 citation statements)

References 16 publications

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“…Managers did not recognize a pattern of virus spread via mealybug and soft-scale insects, despite the documented presence of vectors species, including viruliferous individuals, in local vineyards (Fuchs et al 2009b). The analysis used a model of GLRaV-3 spread described elsewhere (Charles et al 2009) to predict levels of virus infection in the presence of vectors. In that model, a GLRD prevalence of 50% was predicted in years 6, 8, and 11 for the three vineyards studied with low, medium, and high GLRD infection risk, respectively, and 90% in years 11, 12, and 15 (Charles et al 2009).…”

Section: Methodsmentioning

confidence: 99%

“…The analysis used a model of GLRaV-3 spread described elsewhere (Charles et al 2009) to predict levels of virus infection in the presence of vectors. In that model, a GLRD prevalence of 50% was predicted in years 6, 8, and 11 for the three vineyards studied with low, medium, and high GLRD infection risk, respectively, and 90% in years 11, 12, and 15 (Charles et al 2009). The data on GLRD spread over time in the medium infection risk case was used to construct this study's scenario of "no GLRD control" (Table 1, column N).…”

Section: Methodsmentioning

confidence: 99%

“…In this scenario GLRD was introduced in year 1 (either through insect vectors or at planting through infected vines at a level of 1%), spread following the logistic model suggested by Charles et al (2009), and the vineyard manager decided not to rogue or replace the vineyard. Disease spread is summarized in Table 1 where column N lists the percentages of vines infected over time.…”

Section: Scenario 2: No Disease Control (N)mentioning

confidence: 99%

“…It is reported in almost all grape and wine regions in the United States (Fuchs et al 2009a, Martin et al 2005) and worldwide (Charles et al 2009, Freeborough and Burger 2008, Martelli and Boudon-Padieu 2006. GLRD causes significant yield losses (up to 30-68%), delays fruit ripening, reduces soluble solids, and increases titratable acidity in fruit juice (Goheen and Cook 1959, Martelli and Boudon-Padieu 2006, Martinson et al 2008.…”

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confidence: 99%

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Economic Impact of Grapevine Leafroll Disease onVitis viniferacv. Cabernet franc in Finger Lakes Vineyards of New York

Atallah¹,

Gómez²,

Fuchs³

et al. 2011

Am. J. Enol. Vitic.

127

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Leafroll disease is one of the most important virus diseases of grapevines worldwide. It reduces yields, delays fruit ripening, reduces soluble solids, and increases titratable acidity in fruit juice. This study uses a net present value (NPV) approach over a 25-year lifespan of a vineyard to examine the economic impact of grapevine leafroll disease (GLRD) on Vitis vinifera cv. Cabernet franc in Finger Lakes vineyards of New York. It identifies optimal disease control options under several scenarios of disease prevalence, yield reduction, and fruit quality effects. The estimated economic impact of GLRD ranges from approximately $25,000 (for a 30% yield reduction and no grape quality penalty) to $40,000 (for a 50% yield reduction and a 10% penalty for poor fruit quality) per hectare in the absence of any control measure. The per hectare impact of GLRD can be substantially reduced to $3,000-$23,000 through roguing if levels of disease prevalence are moderate (1-25%). With disease prevalence levels greater than 25%, replacing the entire vineyard is the optimal response, yielding economic losses of ~$25,000/ ha. Furthermore, the use of vines derived from certified, virus-tested stocks in replant sites is predicted to keep the costs associated with GLRD infection to ~$1,800/ha. No intervention appears to be economically optimal when (1) infection levels are high (>25%), yield reduction is moderate (<30%), and no price penalty is enforced or (2) when GLRD is transmitted through vectors after year 19. These findings are valuable to construct integrated decision matrices for vineyard managers to devise profit-maximizing disease control strategies and to create incentives for extended uses of clean, virus-tested planting material.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Scenario 2: No Disease Control (N)mentioning

confidence: 99%

mentioning

confidence: 99%

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Economic Impact of Grapevine Leafroll Disease onVitis viniferacv. Cabernet franc in Finger Lakes Vineyards of New York

Atallah¹,

Gómez²,

Fuchs³

et al. 2011

Am. J. Enol. Vitic.

127

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“…GLRaV-3 is one of the most common and detrimental viruses of grapevines, and has led to economic losses of 25 % or more (Atallah et al 2012;Cabaleiro et al 2013;Ricketts et al 2015). Spread of GLRaV-3 in vineyards and vector-borne transmission in controlled laboratory studies were first documented in South Africa (Engelbrecht and Kasdorf 1990), and since then GLRaV-3 spread in vineyards and transmission by several mealybug species have been documented in wine growing regions worldwide (Cabaleiro and Segura 1997;Charles et al 2009;Golino et al 2008;Habili 1995;Le Maguet et al 2012;Tsai et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Disease progression of vector-mediated Grapevine leafroll-associated virus 3 infection of mature plants under commercial vineyard conditions

Blaisdell

Cooper²,

Kuhn³

et al. 2016

Eur J Plant Pathol

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TitleAbstract Grapevine leafroll-associated virus 3 (GLRaV-3) is associated with the economically damaging grapevine leafroll disease, and is transmitted in a semi-persistent manner by several mealybug species. We performed the first controlled field study of vectormediated inoculations with GLRaV-3 in a commercial vineyard with previously asymptomatic vines, and monitored the vines during four growing seasons. We then compared the outcome of vector-mediated inoculations in the field study to an analogous laboratory study. In the vineyard, about half of all inoculated plants became infected with GLRaV-3, fewer than in the controlled laboratory inoculations. Mealybugs had lower settling and feeding success in the field than in the laboratory inoculations. Our study suggests that laboratory studies may overestimate transmission efficiency. All successfully inoculated vineyard plants first became symptomatic one growing season after inoculations, and berry quality declined within one year after inoculations. Vineyard plants were effective virus sources one year after inoculations. Our findings generally indicate that newly symptomatic vines in commercial vineyards probably became infected during the previous growing season, and a decline in berry quality can be expected during the same year in which symptoms appear.

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Influence of mating disruption on the reproductive biology of the vine mealybug,Planococcus ficus(Hemiptera: Pseudococcidae), under field conditions

Cocco

Muscas

Mura

et al. 2018

Pest Management Science

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Our findings provide new insights into the mechanisms underlying the pheromone-based control of the vine mealybug and indicate that the reduction of the pest population density is attributable to both a decrease and a delay in female mating. In addition, the population density of vine mealybugs under mating disruption decreased over the years, indicating that consecutive applications of this control strategy would significantly increase the effectiveness of control of the vine mealybug by mating disruption. © 2018 Society of Chemical Industry.

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Mealybugs and the spread of grapevine leafroll-associated virus 3 (GLRaV-3) in a New Zealand vineyard

Cited by 72 publications

References 16 publications

Economic Impact of Grapevine Leafroll Disease onVitis viniferacv. Cabernet franc in Finger Lakes Vineyards of New York

Economic Impact of Grapevine Leafroll Disease onVitis viniferacv. Cabernet franc in Finger Lakes Vineyards of New York

Disease progression of vector-mediated Grapevine leafroll-associated virus 3 infection of mature plants under commercial vineyard conditions

Influence of mating disruption on the reproductive biology of the vine mealybug,Planococcus ficus(Hemiptera: Pseudococcidae), under field conditions

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