Predisposition to Septoria Leaf Blotch in Oats Affected by Barley Yellow Dwarf Virus

Comeau, A.; Pelletier, Gilles

doi:10.4141/cjps76-003

Cited by 16 publications

(4 citation statements)

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“…Recent experiments have demonstrated that oats infected with BYDV were more susceptible to infection by S . auenae and that the fungus reduced yield more in BYDV-infected than in uninfected plants (43,182). Other work has demonstrated that take-all (Gaeumannomjices graminis (Sacc.)…”

Section: N T E R a C T I O N S W I T H O T H E R M I C R O O R G A mentioning

confidence: 99%

A review of Septoria diseases of wheat and barley

King

Cook²,

Melville

1983

Annals of Applied Biology

194

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Section: N T E R a C T I O N S W I T H O T H E R M I C R O O R G A mentioning

confidence: 99%

A review of Septoria diseases of wheat and barley

King

Cook²,

Melville

1983

Annals of Applied Biology

194

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“…This assumption is confirmed by the high number of naturally fungus-infected ears (c. 30%) and of dead heads (c. 14%) only on plots of BYDV-infected wheat plants but not on uninfected control plots, which showed a maximum of only 5% infected ears. Increased susceptibility of cereals to phytopathogenic fungi resulting from BYDV infection has been reported by several workers (Scott, 1968;Pelletier et aL, 428 KOCH and HUIH 1974;Comeau and Pelletier, 1976;Sward and KoUmorgen, 1990), Comeau and Jedlinski (1990) described a strong correlation between the infections with BYDV and F. eulmorum and found that BYDV-tolerant plants were also tolerant to F. eulmorum.…”

Section: Discussionmentioning

confidence: 66%

Interaction Of Barley Yellow Dwarf Virus and Fusarium culmorum (W. G. Sm.) Sacc. in Winter Wheat

Koch¹,

Huth²

1997

Journal of Phytopathology

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The barley yellow dwarf viras (BYDV) epidetnics, which occtirred predomitiantly in northern Gemiany in 1988-90 and caused untisual yield losses of wheat, prompted our study on interactions of BYDV and Fusarium eulmorum. At the late stages of plant development (EC 55/65) infections with BYDV resulted in a lower yield reduction of wheat plants than infections with F. culmorum. Combined infections at flowering resulted in severer yield reduction, indicating additive effects of the two pathogens. However, if wheat infected by BYDV at stage EC 25/35 was secondarily inoculated with the fungus at EC 55/65 the yield was less reduced than in combined infections at EC 55/65. Our results proved that the susceptibility of wheat plants to F. culmorum is increased when infection by BYDV takes place during the late stages of growth. These results correspond to observations during 3 years of the epidemic in Germany. In these years BYDV was spread mainly dtiring the late spring, resulting in a severe secondary infection by the fungus. From the results of these investigations it may be concluded that during the years of BYDV epidemic the yield of wheat was reduced to an economically important extent because of the fungal infection, which was favoured by the virus infection. ZusammenfassungInteraktionen von barley yellow dwarf virus und Fusarium culmorum in Winterwelzen Der AnlaC fur die hier beschriebenen Untersuchungen war die BYDV-Epidemie in Norddeutschland in den Jahren 1988 bis 1990, die ungewohnlich hohe Ertragsverluste verursachte. Nach BYDV-Infektionen in spaten Entwicklungsstadien der Pflanzen (EC 55/65) waren die Ertrage hoher als nach Infektionen mit Fusarium culmorum. Itifektionen mit BYDV und F. eulmorum wahrend der Blate verursachten die starksten Ertragsminderungen, was auf einen additiven Effekt der beiden Pathogetie schliefien laBt. Wenn jedoch Weizen, der bereits mit BYDV in EC 25/35 infiziert worden war, sekundar mit F. culmorum in EC 55/65 infiziert wurde, waren die Ertrage hoher als nach gleichzeitigen Infektionen mit BYDV tind F. culmorum in dem spaten Entwicklungsstadium EC 55/65. Unsere Ergebnisse zeigen, daB die Anfalligkeit der Weizenpflatizen gegentiber F. culmorum insbesondere nach Infektionen mit BYDV in einem spaten Entwicklungsstadium erhoht ist. Diese Resultate stimmen mit den Beobachtungen wahrend der dreijahrigen Virusepidemie in Deutschland tiberein. Wahrend dieser Zeit breitete sich BYDV hauptsachlich im Frilhsommer aus, gefolgt von einer schweren Sektmdarinfektion des Weizens mit F. culmorum. Aus den vorliegenden Ergebnissen kann geschlossen werden, daC die wirtschaftlich bedeutsame Ertragsreduktion wahrend der BYDV-Epidemie hauptsachlich durch die Pilzinfektion verursacht wurde, die ihrerseits durch den Virusbefall gefordert wurde.

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“…Furthermore, Baltengberger et al [ 13 ] reported more severe symptoms and greater yield losses in plants infected with both BYDV-PAV and CYDV-RPV than they did in plants inoculated with one isolate or the other singly. A high level of Septoria tritici was also observed in experiment 3 and may also have played a role, as significant interactions between BYDV and other diseases have been reported [ 44 , 45 ]. Thus, some of the yield loss reported here may be attributed to other factors that have not been analyzed or captured here, but some of which have been discussed.…”

Section: Discussionmentioning

confidence: 77%

Yield Losses Caused by Barley Yellow Dwarf Virus-PAV Infection in Wheat and Barley: A Three-Year Field Study in South-Eastern Australia

et al. 2021

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Barley yellow dwarf virus (BYDV) is transmitted by aphids and significantly reduces the yield and quality of cereals worldwide. Four experiments investigating the effects of barley yellow dwarf virus-PAV (BYDV-PAV) infection on either wheat or barley were conducted over three years (2015, 2017, and 2018) under typical field conditions in South-Eastern Australia. Plants inoculated with BYDV-PAV using viruliferous aphids (Rhopalosiphum padi) were harvested at maturity then grain yield and yield components were measured. Compared to the non-inoculated control, virus infection severely reduced grain yield by up to 84% (1358 kg/ha) in wheat and 64% (1456 kg/ha) in barley. The yield component most affected by virus infection was grain number, which accounted for a large proportion of the yield loss. There were no significant differences between early (seedling stage) and later (early-tillering stage) infection for any of the parameters measured (plant height, biomass, yield, grain number, 1000-grain weight or grain size) for either wheat or barley. Additionally, this study provides an estimated yield loss value, or impact factor, of 0.91% (72 kg/ha) for each one percent increase in natural BYDV-PAV background infection. Yield losses varied considerably between experiments, demonstrating the important role of cultivar and environmental factors in BYDV epidemiology and highlighting the importance of conducting these experiments under varying conditions for specific cultivar–vector–virus combinations.

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Predisposition to Septoria Leaf Blotch in Oats Affected by Barley Yellow Dwarf Virus

Cited by 16 publications

References 0 publications

A review of Septoria diseases of wheat and barley

A review of Septoria diseases of wheat and barley

Interaction Of Barley Yellow Dwarf Virus and Fusarium culmorum (W. G. Sm.) Sacc. in Winter Wheat

Yield Losses Caused by Barley Yellow Dwarf Virus-PAV Infection in Wheat and Barley: A Three-Year Field Study in South-Eastern Australia

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