Economic Evaluation of the Effects of Planting Date and Application Rate of Imidacloprid for Management of Cereal Aphids and Barley Yellow Dwarf in Winter Wheat

2005 ◽  
Vol 98 (1) ◽  
pp. 95-102 ◽  
Author(s):  
T. A. Royer ◽  
K. L. Giles ◽  
T. Nyamanzi ◽  
R. M. Hunger ◽  
E. G. Krenzer ◽  
...  
Keyword(s):  
Economic Evaluation ◽  
Winter Wheat ◽  
Application Rate ◽  
Planting Date ◽  
Yellow Dwarf ◽  
Cereal Aphids ◽  
Barley Yellow Dwarf

Modified Recurrent Selection for Barley Yellow Dwarf Virus Tolerance in Winter Wheat

Crop Science ◽  
1994 ◽  
Vol 34 (2) ◽  
pp. 371-375 ◽  
Author(s):  
Ellen M. Bauske ◽  
Frederic L. Kolb ◽  
Adrianna D. Hewings ◽  
Gordon Cisar
Keyword(s):  
Winter Wheat ◽  
Recurrent Selection ◽  
Barley Yellow Dwarf Virus ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Barley Yellow Dwarf ◽  
Virus Tolerance ◽  
Selection For ◽  
Yellow Dwarf Virus

Estimating Yield Losses Due to Barley Yellow Dwarf on Winter Wheat in Kansas Using Disease Phenotypic Data

2015 ◽  
Vol 16 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Genna M. Gaunce ◽  
William W. Bockus
Keyword(s):  
Winter Wheat ◽  
Yield Loss ◽  
Disease Incidence ◽  
Relative Yield ◽  
Yellow Dwarf ◽  
Wheat Cultivars ◽  
Grain Yields ◽  
Barley Yellow Dwarf ◽  
Winter Wheat Cultivars ◽  
The Impact

Barley yellow dwarf (BYD) is one of the most important wheat diseases in the state of Kansas. Despite the development of cultivars with improved resistance to BYD, little is known about the impact that this resistance has on yield loss from the disease. The intent of this research was to estimate yield loss in winter wheat cultivars in Kansas due to BYD and quantify the reduction in losses associated with resistant cultivars. During seven years, BYD incidence was visually assessed on numerous winter wheat cultivars in replicated field nurseries. When grain yields were regressed against BYD incidence scores, negative linear relationships significantly fit the data for each year and for the combined dataset covering all seven years. The models showed that, depending upon the year, 19–48% (average 33%) of the relative yields was explained by BYD incidence. For the combined dataset, 29% of the relative yield was explained by BYD incidence. The models indicated that cultivars showing the highest disease incidence that year had 25–86% (average 49%) lower yield than a hypothetical cultivar that showed zero incidence. Using the models, the moderate level of resistance in the cultivar Everest was calculated to reduce yield loss from BYD by about 73%. Therefore, utilizing visual BYD symptom evaluations in Kansas coupled with grain yields is useful to estimate yield loss from the disease. Accepted for publication 1 December 2014. Published 9 January 2015.

Grassy Weeds and Corn as Potential Sources of Barley yellow dwarf virus Spread Into Winter Wheat

Plant Disease ◽  
2020 ◽  
pp. PDIS-05-20-1004
Author(s):  
Mahnaz Rashidi ◽  
Regina K. Cruzado ◽  
Pamela J. S. Hutchinson ◽  
Nilsa A. Bosque-Pérez ◽  
Juliet M. Marshall ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Barley Yellow Dwarf Virus ◽  
Rhopalosiphum Padi ◽  
Virus Titer ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Virus Spread ◽  
Weed Species ◽  
Barley Yellow Dwarf ◽  
Yellow Dwarf Virus

Barley yellow dwarf virus (BYDV) is an important vector-borne pathogen of cereals. Although many species of grasses are known to host BYDV, knowledge of their role in virus spread in regional agroecosystems remains limited. Between 2012 and 2016, Idaho winter wheat production was affected by BYDV. BYDV-PAV and the bird cherry-oat aphid (BCOA) (Rhopalosiphum padi L.) vector were commonly present in the affected areas. A series of greenhouse bioassays were performed to examine whether two types of corn (Zea mays L.), dent and sweet, and three commonly found grassy weeds, downy brome (Bromus tectorum L.), green foxtail (Setaria viridis L.), and foxtail barley (Hordeum jubatum L.), can be inoculated with BYDV (species BYDV-PAV) by BCOA and also act as sources of the virus in winter wheat. BCOA successfully transmitted BYDV-PAV to both corn types and all weed species. Virus titers differed between the weed species (P = 0.032) and between corn types (P = 0.001). In transmission bioassays, aphids were able to survive on these host plants during the 5-day acquisition access period and later successfully transmitted BYDV-PAV to winter wheat (var. SY Ovation). Transmission success was positively correlated with the virus titer of the source plant (P < 0.001) and influenced by weed species (P = 0.028) but not corn type. Overall, the results of our inoculation and transmission assays showed that the examined weed species and corn types can be inoculated with BYDV-PAV by BCOA and subsequently act as sources of infections in winter wheat.

scholarly journals Reaction of wheat varieties to infection with barley yellow dwarf virus and prospects for resistance breeding

2009 ◽  
Vol 45 (No. 2) ◽  
pp. 45-56 ◽  
Author(s):  
O. Veškrna ◽  
J. Chrpová ◽  
V. Šíp ◽  
T. Sedláček ◽  
P. Horčička
Keyword(s):  
Winter Wheat ◽  
Spring Wheat ◽  
Barley Yellow Dwarf Virus ◽  
Field Trials ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Wheat Varieties ◽  
Barley Yellow Dwarf ◽  
Virus Content ◽  
Yellow Dwarf Virus

The reaction of winter and spring wheat to infection with barley yellow dwarf virus (BYDV-PAV) was evaluated in three-year small-plot field trials on 71 wheat varieties registered in the Czech Republic and at two locations for two years on 63 selected potential sources of resistance. Disease symptoms (VSS) were visually recorded using a 0&ndash;9 scale and the percent reduction of grain weight per spike (GWS-R) was measured on twenty plants per plot. The evaluation showed that among the registered varieties of winter and spring wheat no variety had a high resistance to BYDV (with VSS lower than 3.5). GWS-R ranged between 24% and 60%. Higher variability in VSS was detected for the registered varieties of spring wheat compared to winter wheat. Among the registered varieties of winter wheat, Saskia, Rialto, Meritto, Rexia, and Svitava, as well as the spring wheat Leguan, received the best long-term evaluations. The highest level of resistance was detected for the PSR 3628 line (a hybrid of wheat and couch-grass), but in connection with a low agronomic value. The WKL91-138 line of spring wheat and some varieties (lines) with the detected moderate level of resistance, in particular, could offer good prospects for use in breeding. The presence of the Bdv2 gene was expressed only in the reduction of virus content on the 11<sup>th</sup> day after inoculation. Nevertheless, genotypes carrying this gene were evaluated in field trials as susceptible or very susceptible to infection with the Czech PAV isolate. Similarly, the presence of the Bdv1 gene detected with the help of WMS130 marker was no assurance of an increased level of resistance to BYDV. Hybridological analyses of crosses with the WKL91-138 line showed a polygenic nature of inheritance. Thus, the marker-assisted selection does not obviously promise success without a focus on detecting a larger number of QTLs.

Winter Wheat Responses to Bird Cherry‐Oat Aphids and Barley Yellow Dwarf Virus Infection

Crop Science ◽  
1999 ◽  
Vol 39 (1) ◽  
pp. 158-163 ◽  
Author(s):  
Walter E. Riedell ◽  
Robert W. Kieckhefer ◽  
Scott D. Haley ◽  
Marie A. C Langham ◽  
Paul D. Evenson
Keyword(s):  
Virus Infection ◽  
Winter Wheat ◽  
Barley Yellow Dwarf Virus ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Barley Yellow Dwarf ◽  
Yellow Dwarf Virus
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