Management of wheat stripe mosaic virus by crop rotation
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Management of wheat stripe mosaic virus by crop rotation Lucas Antonio Stempkowski & Fernando Sartori Pereira & Juliana Borba Valente & Monica Farias & Douglas Lau & Genei Antonio Dalmago & Anderson Santi & Talita Bernardon Mar & Paulo Kuhnem & Ricardo Trezzi Casa & Amauri Bogo & Fábio Nascimento da Silva
Accepted: 8 July 2020 # Koninklijke Nederlandse Planteziektenkundige Vereniging 2020
Abstract Soil-borne wheat mosaic disease (SBWMD) caused by wheat stripe mosaic virus (WhSMV) is one of the most important viral diseases of wheat in Brazil. Farmers have used crop rotation (CR) successfully to reduce the incidence of many diseases in wheat. CR can contribute along with genetic resistance in the management of SBWMD. The objective of this study was to evaluate the effect of CR in SBWMD incidence and wheat yield as compared with wheat monoculture (W). During 2017 and 2018 growth seasons, in a long-term experiment, W and three CR: W1 – white oats-wheat; W2 – vetch-white oats- wheat; and W3 – black oatsbarley-black oats-wheat were evaluated using three wheat cultivars: BRS Parrudo (resistant), BRS Reponte (moderately resistant) and BRS Guamirim (susceptible). The rainiest season (2018) was more favorable to the development of the disease. In this year, CR W2 and W3 significantly decreased SBWMD incidence by 90% compared to wheat monoculture. Also, grain yield (GY) differences between CR were higher in the rainiest season. GY increases up to 58% (BRS Reponte), 81% (BRS Guamirim) and 106% (BRS Parrudo) in W2 and L. A. Stempkowski : F. S. Pereira : J. B. Valente : M. Farias : R. T. Casa : A. Bogo : F. N. da Silva Crop Production Graduate Program, Santa Catarina State University/UDESC, Lages, SC 88520-000, Brazil D. Lau (*) : G. A. Dalmago : A. Santi : T. B. Mar Embrapa Trigo, Passo Fundo, RS 99050-970, Brazil e-mail: [email protected] P. Kuhnem Biotrigo Genética LTDA, Passo Fundo, RS 99050-970, Brazil
W3. The use of plant species that are non-hosts of WhSMV may be one of the main factors that contribute to the reduction of SBWMD levels. Keywords Triticum aestivum L. . Cultural method . Polymyxa graminis . Host range . Soil-borne transmitted virus . Grain yield
Introduction Diseases and pests cause yield losses of about 20% to the global wheat production every year (Figueroa et al. 2018). Among them, viral diseases provide a major challenge to agriculture worldwide (Burrows et al. 2016; Jones and Naidu 2019). Soil-borne transmitted virus cause soil-borne wheat mosaic disease (SBWMD) in cereal crops and result in significant grain yield reductions worldwide (Kanyuka et al. 2003). Among the etiologic agents of the SBWMD were described Soil-borne wheat mosaic virus (Furovirus genus, Virgaviridae family) and Wheat spindle streak mosaic virus (Bymovirus genus, Potyviridae family). In Brazil, SBWMD was first described in wheat (Triticum aestivum L.) in 1978 (Caetano et al. 1978) and was formerly attributed to soil-borne wheat mosaic virus (SBWMV). However, recent genome sequencing results reveled that, in Brazil, SBWMD
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