Estimation of Severity Level of Wheat Powdery Mildew Based on Canopy Spectral Reflectance

Both wheat powdery mildew severities and nitrogen input levels can lead to changes in spectral reflectance, but they have been rarely studied simultaneously for their effect on spectral reflectance. To determine the effects and influences of different nitrogen input levels on monitoring wheat powdery mildew and estimating yield by near-ground hyperspectral remote sensing, Canopy hyperspectral reflectance data acquired at Feekes growth stage (GS) 10.5.3, 10.5.4, and 11.1 were used to monitor wheat powdery mildew and estimate grain yield under different nitrogen input levels during the 2016–2017, 2017–2018, 2018–2019 and 2019–2020 seasons. The relationships of powdery mildew and grain yield with vegetation indices (VIs) derived from spectral reflectance data across the visible (VIS) and near-infrared (NIR) regions of the spectrum were studied. The relationships of canopy spectral reflectance or first derivative spectral reflectance with powdery mildew did not differ under different nitrogen input levels. However, the dynamics of VIs differed in their sensitivities to nitrogen input levels, disease severity, grain yield, The area of the red edge peak (Σdr680–760 nm) was a better overall predictor for both disease severity and grain yield through linear regression models. The slope parameter estimates did not differ between the two nitrogen input levels at each GSs. Hyperspectral indices can be used to monitor wheat powdery mildew and estimate grain yield under different nitrogen input levels, but such models are dependent on GS and year, further research is needed to consider how to incorporate the growth stage and year-to-year variation into future applications.

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Dissection and QTL Mapping of Component Traits of Resistance to Wheat Powdery Mildew at Early Infection Stage

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2011.01219 ◽

2011 ◽

Vol 37 (7) ◽

pp. 1219-1228

Author(s):

Hua-Zhong WANG ◽

Zhen ZHANG ◽

Yang HE ◽

Jie-Yu YUE

Keyword(s):

Powdery Mildew ◽

Qtl Mapping ◽

Early Infection ◽

Wheat Powdery Mildew ◽

Component Traits ◽

Infection Stage

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Studies on the control effect of Bacillus subtilis on wheat powdery mildew

Pest Management Science ◽

10.1002/ps.6471 ◽

2021 ◽

Author(s):

Deshan Xie ◽

Xuewei Cai ◽

Chunping Yang ◽

Linjun Xie ◽

Guangwei Qin ◽

...

Keyword(s):

Bacillus Subtilis ◽

Powdery Mildew ◽

Control Effect ◽

Wheat Powdery Mildew

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Analysis of Anti-interference Ability of Hyperspectral Sensitive Features to Wheat Powdery Mildew

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/693/1/012124 ◽

2021 ◽

Vol 693 (1) ◽

pp. 012124

Author(s):

Jinling Zhao ◽

Guomin Chu ◽

Hao Yan ◽

Lei Hu ◽

Yongan Xue

Keyword(s):

Powdery Mildew ◽

Wheat Powdery Mildew

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The effect of phytoglobin overexpression on the plant proteome during nonhost response of barley (Hordeum vulgare) to wheat powdery mildew (Blumeria graminis f. sp. tritici)

Scientific Reports ◽

10.1038/s41598-020-65907-z ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

O. A. Andrzejczak ◽

C. K. Sørensen ◽

W.-Q. Wang ◽

S. Kovalchuk ◽

C. E. Hagensen ◽

...

Keyword(s):

Hordeum Vulgare ◽

Powdery Mildew ◽

Blumeria Graminis ◽

Wheat Powdery Mildew

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Fungicide sensitivity of populations of wheat powdery mildew (Erysiphe graminisf.sp.Tritici) in Central Europe in 1993

Pesticide Science ◽

10.1002/ps.2780430107 ◽

1995 ◽

Vol 43 (1) ◽

pp. 47-52 ◽

Cited By ~ 3

Author(s):

Miroslav Švec ◽

Marta Miklovičová ◽

Milan Sýkora ◽

Eduard Krippel

Keyword(s):

Powdery Mildew ◽

Central Europe ◽

Fungicide Sensitivity ◽

Wheat Powdery Mildew

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Changes in sterol composition with ontogeny of Blumeria graminis conidia

Canadian Journal of Botany ◽

10.1139/b00-106 ◽

2000 ◽

Vol 78 (10) ◽

pp. 1288-1293 ◽

Cited By ~ 2

Author(s):

Jérôme Muchembled ◽

Anissa Lounès-Hadj Sahraoui ◽

Anne Grandmougin-Ferjani ◽

Michel Sancholle

Keyword(s):

Powdery Mildew ◽

Plant Pathogen ◽

Total Sterol ◽

Sterol Composition ◽

Blumeria Graminis ◽

Erysiphe Graminis ◽

Qualitative And Quantitative ◽

Wheat Powdery Mildew

The total sterol composition of conidia of the obligate plant pathogen Blumeria (= Erysiphe) graminis f.sp. tritici has been analysed as a function of their ontogeny during sporulation. Two main classes of sterols were characterized: 24-ethylsterols (24-ethylcholesta-5,22-dienol, 24-ethylcholesterol, and Δ5-avenasterol) and 24-methylsterols (24-methylenecholesterol and episterol). Our results show that sterol composition is greatly modified during ontogeny of B. graminis conidia both at the qualitative and quantitative levels. In particular, 24-methylsterols, e.g., 24-methylenecholesterol and episterol, are the major sterols in old conidia whereas 24-ethylsterols, e.g., 24-ethylcholesta-5,22-dienol, 24-ethylcholesterol, and Δ5-avenasterol, are the main sterols in young conidia.Key words: Erysiphe, wheat powdery mildew, sterols, ontogeny.

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