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

Blaisdell, G. Kai; Cooper, Monica L.; Kuhn, Emily J.; Taylor, Katey A.; Daane, Kent M.; Almeida, Rodrigo P. P.

doi:10.1007/s10658-016-0896-8

Cited by 22 publications

(15 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ferrisia gilli is especially important given that it is one of just two mealybug species found in the region, the other being Ps. maritimus (L. R. Wunderlich, personal observation), which is also an effective vector of GLRaV-3 in vineyards (Blaisdell et al 2016). Planococcus ficus is another invasive pest and well-studied vector of GLRaV species in other California grape-growing regions, which has not yet successfully established in the Sierra Foothill region, perhaps limited by colder winter temperatures in the foothills compared with the interior valley and coastal regions.…”

Section: Discussionmentioning

confidence: 99%

Ferrisia gilli(Hemiptera: Pseudococcidae) Transmits Grapevine Leafroll-Associated Viruses

Wistrom¹,

Blaisdell²,

Wunderlich³

et al. 2016

J Econ Entomol

View full text Add to dashboard Cite

Several mealybug species are vectors of grapevine leafroll-associated viruses (GLRaV), which cause the economically important grapevine leafroll disease in grape-producing regions worldwide. The mealybug Ferrisia gilli Gullan is a new pest of grapevines in El Dorado County, located in the Sierra Foothill wine-growing region of California. GLRaV species 1, 2, 3, and 4LV have been detected in vineyards with symptomatic vines in the Sierra Foothills. We conducted controlled virus acquisition and transmission experiments using source vine accessions infected with different combinations of GLRaV. We determined that F. gilli acquired GLRaV 1, 2, 3, and 4LV, and transmitted GLRaV-3 and GLRaV-4LV to uninfected recipient vines. Like numerous other mealybug species, in addition to causing direct damage to vines, F. gilli poses a threat to the grape industry as a vector of economically damaging viruses.

show abstract

Section: Discussionmentioning

confidence: 99%

Ferrisia gilli(Hemiptera: Pseudococcidae) Transmits Grapevine Leafroll-Associated Viruses

Wistrom¹,

Blaisdell²,

Wunderlich³

et al. 2016

J Econ Entomol

View full text Add to dashboard Cite

show abstract

“…Blaisdell et al [29] Co-infections of GLRaVs are frequent in grapevines although with some spatial separation with implications for transmission and epidemiology.…”

Section: Multiple Virus Species-multiple Vector Speciesmentioning

confidence: 99%

“…Similarly, there are many cases where two co-infecting viruses have quite different vectors taxonomically [27]. Co-infection is manifested in more complex situations with multiple viruses and vectors such as with grapevine leafroll disease [28,29] and sweet potato virus disease (SPVD) [30]. At an even higher level of complexity, the ecological networks formed by multiple co-infecting viruses and multiple hosts were analyzed by McLeish et al [31].…”

Section: Introductionmentioning

confidence: 99%

Modelling Vector Transmission and Epidemiology of Co-Infecting Plant Viruses

Allen

Bokil

Cunniffe

et al. 2019

Viruses

View full text Add to dashboard Cite

Co-infection of plant hosts by two or more viruses is common in agricultural crops and natural plant communities. A variety of models have been used to investigate the dynamics of co-infection which track only the disease status of infected and co-infected plants, and which do not explicitly track the density of inoculative vectors. Much less attention has been paid to the role of vector transmission in co-infection, that is, acquisition and inoculation and their synergistic and antagonistic interactions. In this investigation, a general epidemiological model is formulated for one vector species and one plant species with potential co-infection in the host plant by two viruses. The basic reproduction number provides conditions for successful invasion of a single virus. We derive a new invasion threshold which provides conditions for successful invasion of a second virus. These two thresholds highlight some key epidemiological parameters important in vector transmission. To illustrate the flexibility of our model, we examine numerically two special cases of viral invasion. In the first case, one virus species depends on an autonomous virus for its successful transmission and in the second case, both viruses are unable to invade alone but can co-infect the host plant when prevalence is high.

show abstract

“…maritimus management programs in northern California vineyards were focussed on reducing economic damage to the fruit and were not based on vector control criteria. This may affect disease spread because transmission of GLRaV-3 under field conditions is efficient (Blaisdell et al 2016), whereas a larger Ps. maritimus population is required to cause direct economic damage from mealybug feeding.…”

mentioning

confidence: 99%

Incidence of Grapevine Leafroll Disease: Effects of Grape Mealybug (Pseudococcus maritimus) Abundance and Pathogen Supply

Cooper

Daugherty

Jeske

et al. 2018

Journal of Economic Entomology

View full text Add to dashboard Cite

Studies of spatiotemporal dynamics are central to efforts to characterize the epidemiology of infectious disease, such as mechanism of pathogen spread and pathogen or vector sources in the landscape, and are critical to the development of effective disease management programs. To that end, we conducted a multi-year study of 20 vineyard blocks in coastal northern California to relate the dynamics of a mealybug vector, Pseudococcus maritimus (Ehrhorn) (Hemiptera: Pseudococcidae), to incidence of grapevine leafroll disease (GLD). In each vineyard block, a subset of vines were scored visually for relative mealybug abundance, disease was quantified by visual assessment, and virus presence was verified using standard laboratory molecular assays. GLD incidence was analyzed with a classification and regression tree, and with a hierarchical model that also captured variability among blocks and heterogeneity within blocks. Both analyses found strong interannual variability in incidence, with the hierarchical model also capturing substantial between- and within-block heterogeneity, but with significant contributions of vector abundance and pathogen supply (prior disease incidence) to the frequency of newly diseased vines. These results strengthen further the conclusion that mealybug vectors are causally related to pathogen spread in this system and are therefore an important target for management. Moreover, they are consistent with relatively efficient secondary spread of the pathogen, suggesting an important role for the removal of diseased vines as a tool to mitigate further damage.

show abstract

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

Cited by 22 publications

References 24 publications

Ferrisia gilli(Hemiptera: Pseudococcidae) Transmits Grapevine Leafroll-Associated Viruses

Ferrisia gilli(Hemiptera: Pseudococcidae) Transmits Grapevine Leafroll-Associated Viruses

Modelling Vector Transmission and Epidemiology of Co-Infecting Plant Viruses

Incidence of Grapevine Leafroll Disease: Effects of Grape Mealybug (Pseudococcus maritimus) Abundance and Pathogen Supply

Contact Info

Product

Resources

About