The Hot Spots in Cereal Rusts and Powdery Mildew Research

Chen, Wanquan; Duan, Xiayu

doi:10.1016/s2095-3119(13)60688-7

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Wheat powdery mildew, caused by Blumeria graminis f. sp. tritici ( Bgt ), is one of the major wheat diseases in the world ( Chen and Duan, 2014 ; Mwale et al, 2014 ; 2015 ; Liu et al, 2018 , 2021 ), and poses a significant threat to wheat production and food security ( Li et al, 2012 , 2018 ; Cao et al, 2014 ; Singh et al, 2016 ; Jevtić et al, 2017 ). The disease has existed and maintained a more serious state of occurrence since the late 1970s in China due to the increased use of fertilizer, expansion of irrigated production areas, and the wide use of highly susceptible wheat cultivars in fields.…”

Section: Introductionmentioning

confidence: 99%

The Quantitative Analyses for the Effects of Two Wheat Varieties With Different Resistance Levels on the Fungicide Control Efficacies to Powdery Mildew

et al. 2022

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Effective strategies to reduce the occurrence of wheat powdery mildew include the use of resistant varieties and application of fungicides. However, most studies rarely focus on the quantitative value of fungicide reduction using resistant varieties. To explore how the fungicides performed on different resistant wheat varieties to powdery mildew, field experiments were conducted during wheat growing seasons in 2018/19 and 2019/20 to investigate the control efficacies of enostroburin⋅epoxiconazole 18% SC and triadimefon 20% EC to wheat powdery mildew on a highly resistant wheat variety (“Baofeng104”) and a highly susceptible wheat variety (“Jingshuang16”). The analyses of variance on control efficacies showed that the control efficacies of enostroburin⋅epoxiconazole 18% SC to wheat powdery mildew were mostly significantly higher than triadimefon 20% EC under the same conditions (i.e., varieties, dosages). However, both fungicide and variety resistance made variabilities in the mildew disease index and played a significant role in mildew management. Particularly, the variety resistance made the greatest contribution in mildew-reducing, and the disease index could significantly be reduced on the highly resistant variety even in the absence of fungicide treatment. The control efficacies to mildew on the highly susceptible variety mainly depended on the high efficiency of fungicides whereas the highly resistant variety were mainly by virtue of variety resistance through the comparative analyses of linear regression models. Furthermore, the random-coefficient regression models and quantile models quantificationally expounded that the relationships between active ingredient dosage and disease index or control efficacy varied from the effects of variety, fungicide, and year, particular from variety. Thus, a dosage reference table of enostroburin⋅epoxiconazole 18% SC or triadimefon 20% EC for different resistant wheat varieties were provided; it would be helpful for users to formulate an appropriate dosage of fungicide on mildew management in the field and avoid overusing or superfluous application. Further study needs to consider the effects of fungicide reduction on wheat yields, only then the maximum-economic benefits on mildew management can be determined.

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Section: Introductionmentioning

confidence: 99%

The Quantitative Analyses for the Effects of Two Wheat Varieties With Different Resistance Levels on the Fungicide Control Efficacies to Powdery Mildew

et al. 2022

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“…The second hypothesis was that a close relationship existed between avirulence/virulence phenotype and molecular genotype of the P. triticina isolates. Our objectives therefore included: (i) to determine the pathogenic diversity of the P. triticina populations from different provinces; (ii) to examine the association of pathogenic variation and molecular genotype in the sampled populations; (iii) to determine if there are 'hot-spot' areas for long-term survival of P. triticina in China similar to that shown for P. striiforms (Chen and Duan 2014).…”

Section: Introductionmentioning

confidence: 99%

Population genetic structure of Chinese Puccinia triticina races based on multi-locus sequences

Liu

et al. 2018

Journal of Integrative Agriculture

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Puccinia triticina, the causal agent of wheat leaf rust, is one of the most devastating rust fungi attacking wheat worldwide. Seventy-six isolates of the wheat leaf rust pathogen from Yunnan, Sichuan, Gansu and Henan provinces, China, were tested on wheat leaf rust differentials and the population structure was analyzed using four presumably neutral partial sequence markers such as elongation factor-1α (EF-1α), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), β-tubulin (TUB) and the second largest RNA polymerase subunit (RPB2). The phenotypic diversity of the Yunnan and Sichuan populations was higher than that of the Gansu and Henan populations. The four populations were separated into two clusters based on the pathogenic data. A total of 12 single nucleotide polymorphisms (SNPs) and 32 haplotypes were identified among the four sequences. The 32 haplotypes were divided into two clusters in a neighbor-joining tree. Bayesian analyses also identified two clusters. Pairwise F ST between populations in different regions were significantly different (P<0.05). AMOVA indicated that 68% of the total genetic variation was within populations.

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The Hot Spots in Cereal Rusts and Powdery Mildew Research

Cited by 2 publications

References 8 publications

The Quantitative Analyses for the Effects of Two Wheat Varieties With Different Resistance Levels on the Fungicide Control Efficacies to Powdery Mildew

The Quantitative Analyses for the Effects of Two Wheat Varieties With Different Resistance Levels on the Fungicide Control Efficacies to Powdery Mildew

Population genetic structure of Chinese Puccinia triticina races based on multi-locus sequences

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