Aphid Abundance on Cereals in Autumn Predicts Yield Losses Caused by <i>Barley yellow dwarf virus</i>

Fabre, Frédéric; Dedryver, C. A.; Leterrier, J L; Plantegenest, Manuel

doi:10.1094/phyto.2003.93.10.1217

Cited by 57 publications

(41 citation statements)

References 34 publications

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“…In addition, faster initial spread could cause more crop damage because in many pathosystems, plants infected earlier in development have greater yield losses than those infected later (BosqueÐPé rez et al 1998). For example, wheat infected with BYDV early in the growing season shows greater yield loss than wheat infected later in the growing season (Perry et al 2000, McKirdy et al 2002, Fabre et al 2003. Similarly, potato develops more net necrosis when infected by PLRV earlier in the season (Manzer et al 1982, Roosen et al 1997, Marsh et al 2000.…”

Section: Discussionmentioning

confidence: 99%

Conditional Vector Preference Aids the Spread of Plant Pathogens: Results From a Model

et al. 2013

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Vectors of several economically important plant viruses have been shown to feed or settle preferentially on either infected or noninfected host plants. Recent research has revealed that the feeding or settling preferences of insect vectors can depend on whether a vector is inoculative (carries the virus). To explore the implications of such changes in vector preference for the spread of the pathogen, we create a basic model of disease spread, incorporating vector preferences for infected and noninfected plants dependent on whether the vector is inoculative. Previous modeling work assumed that vector preferences remain unchanged with vector infection status and showed that vector preference for infected host plants promotes disease spread when infected hosts are rare, whereas preference for noninfected hosts promotes spread once infected hosts become abundant. In contrast, our model shows that a change in preference following acquisition of the pathogen can increase pathogen spread throughout the epidemic if noninoculative vectors prefer infected plants and inoculative vectors prefer noninfected plants, as has been detected experimentally in two pathosystems. Our results show that conditional vector preference can substantially influence plant pathogen spread, with implications for agricultural and natural systems. Conditional preference as a component of virus manipulation of vector behavior is potentially more important for the understanding of plant disease spread than previously recognized.

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Section: Discussionmentioning

confidence: 99%

Conditional Vector Preference Aids the Spread of Plant Pathogens: Results From a Model

et al. 2013

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“…Standard ranges corresponding to two-times serially diluted fractions were prepared using either a crude sap produced by grinding approximately 1 g of BYDV-infected barley leaves in 1 ml of grinding buffer or a BYDV-purified fraction (4.25 ng ll )1 ) of viral particles. BYDV particles present in samples were detected by DAS-ELISA using a polyclonal serum raised against BYDV-PAV (IgG PAV52, H. Lapierre, INRA, France) and according to previously published protocols (Torrance et al, 1986;Fabre et al, 2003). Standard ranges were included on 96-well microplates (crude sap dilutions on all plates; BYDVpurified diluted fractions on one plate per series) to compensate inter-plate variation of ELISA results and to estimate the virus load of the tested samples.…”

Section: Semi-quantitative Detection Of Bydv-pav By Das-elisamentioning

confidence: 99%

Analysis of Accumulation Patterns of Barley yellow dwarf virus-PAV (BYDV-PAV) in Two Resistant Wheat Lines

et al. 2005

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Barley yellow dwarf (BYD) is one of the main viral diseases of small-grain cereals. This disease, reported on numerous plant species of the Poaceae family, is caused by a complex of eight viral species including the species Barley Yellow Dwarf Virus-PAV (BYDV-PAV), frequently found in western Europe. Resistance sources against BYDV-PAV are scarce and only identified in perennial Triticineae. Some BYDV-resistant wheat lines have been obtained by introgressing these resistances into bread wheat germplasms. Genetic and biological characterization of the resulting lines has been undertaken. However, little information on the resistant behaviour of these lines during the early stages of the infection process is available. To evaluate the resistance of two genetically distinct resistant lines (Zhong ZH and TC14), 1740 young plantlets, belonging to susceptible reference hosts (barley cv. Express and wheat cv. Sunstar), Zhong ZH or TC14 wheat lines, were inoculated in controlled conditions with French BYDV-PAV isolates. The infection process was monitored during the first 21 days after inoculation (DAI) using a semi-quantitative ELISA. A standardized protocol including five successive samplings of leaves from all inoculated plants and the collection of plant roots at the end of the monitored period was carried out. This protocol enabled an assessment of the infection percentage and the evolution of the viral load in plants from the 7th DAI to the 21st DAI. Statistical analyses of the BYDV infection kinetics using raw ELISA data, a model of the timedependent variation of the percentage of infected plants and the area under concentration progress curves (AUCPC) demonstrated that Zhong ZH and TC14 lines (1) reduce the development rate of the BYD disease during the first days of infection, (2) decrease the infection efficiency of BYDV-PAV isolates, in the leaves, from 98.7% for susceptible plant genotypes to 81.9% and 71.7% for Zhong ZH and TC14, respectively, (3) reduce the virus load in the leaves of infected plants and (4) are not spared from BYDV infection, as 95.1% of Zhong ZH and 90.2% of TC14 inoculated plants accumulated viral particles in roots and/or in leaves at 21 DAI. These results confirm the BYDV-partial resistant behaviour of both Zhong ZH and TC14 lines. The development rate of the disease was the single parameter that allowed the distinction between the two resistant sources present in the tested lines.

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“…This emphasises the importance of cultivar and genotype effects on aphid life history traits. The higher R. padi fecundity on seedlings observed may be because R. padi is associated with feeding on cereal crop seedlings during warm autumns leading to BYDV transmission (Fabre et al, 2003; Riedell et al, 1997) and could be better adapted to feeding on seedlings than on older plants.…”

Section: Discussionmentioning

confidence: 99%

Temporal changes in post-alighting resistance toRhopalosiphum padi(bird cherry-oat aphid) in ancestral wheats

Simon

Smart

Hammond‐Kosack

et al. 2019

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Aphid Abundance on Cereals in Autumn Predicts Yield Losses Caused by Barley yellow dwarf virus

Cited by 57 publications

References 34 publications

Conditional Vector Preference Aids the Spread of Plant Pathogens: Results From a Model

Conditional Vector Preference Aids the Spread of Plant Pathogens: Results From a Model

Analysis of Accumulation Patterns of Barley yellow dwarf virus-PAV (BYDV-PAV) in Two Resistant Wheat Lines

Temporal changes in post-alighting resistance toRhopalosiphum padi(bird cherry-oat aphid) in ancestral wheats

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