Control of septoria leaf blotch of wheat and powdery mildew of barley with antitranspirant epidermal coating materials

AC Hamilton is a six-rowed spring feed barley (Hordeum vulgare L.) cultivar bred at the Plant Research Centre, Agriculture and Agri-Food Canada, and evaluated by the Eastern Canada Barley Breeding Group. It was selected from a Leger/OAC Kippen cross and is suitable for growing in Ontario, where it outyielded the check cultivars AC Stephen and Chapais. AC Hamilton is moderately resistant to powdery mildew (Erysiphe graminis f. sp. hordei) and is resistant to septoria leaf blotch (Septoria passerinii). Key words:Hordeum vulgare L., six-rowed barley, feed barley, high yield, powdery mildew

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Characteristics of wheat leaf diseases development in Latvia

Acta Agrobotanica ◽

10.5586/aa.2005.059 ◽

2012 ◽

Vol 58 (2) ◽

pp. 329-334 ◽

Cited By ~ 1

Author(s):

Biruta Bankina ◽

Ilza Priekule

Keyword(s):

Powdery Mildew ◽

Septoria Tritici ◽

Field Observations ◽

Septoria Leaf Blotch ◽

Leaf Blotch ◽

Wheat Leaf ◽

Disease Epidemics

The field observations were carried out in 1999-2004 on 29 fields in Latvia. Incidence and severities of wheat leaf diseases were determined. Tan pot caused by Drechslera tritici-repentis and Septoria leaf blotch, induced by Septoria tritici were the most harmful diseases at the time of research (incidence 10-100% and 1-100%, respectively). Also the incidence of powdery mildew, caused by Blomeria graminis was high (4-100%), while that of rusts (Puccinia tritici and P. striiformis) was very low. Changes in disease epidemics were determined and showed the differences between the analyzed diseases.

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Fungicides against diseases of lawn grass leaves

Karantin i zahist roslin ◽

10.36495/2312-0614.2019.3-4.7-9 ◽

2019 ◽

pp. 7-9

Author(s):

S. Retman ◽

O. Nychyporuk ◽

О. Shevchuk

Keyword(s):

Powdery Mildew ◽

Technical Efficiency ◽

Disease Severity ◽

Growing Season ◽

Disease Spread ◽

Septoria Leaf Blotch ◽

Leaf Blotch ◽

Chemical Groups ◽

Positive Effect

Goal. To evaluate the effectiveness of the use of fungicides of various chemical groups against the leaf diseases turfgrass. Methods. The research was carried out in 2015—2017 on the lawn mixture «Universal» in the zone of the Polissya of Ukraine. The effect of fungicides of various chemical groups was investigated (Impact T, SC; Bumper Super, EC; Amistar Extra 280 SC, SC; Alto Super 300 EC, EC; Maxim 025 FS, FS; Horus 75 WG, WG). Fungicides were applied twice. The first spraying was carried out when development of diseases in control plot reached 3—5%, the second — in 30 days. The assessments were performed according to generally accepted methods, disease spread, disease severity and technical efficiency of pesticides were determined. Results. During the period of research, the most common leaf diseases of turfgrass, which eveloped annually and had a significant severity during the growing season, were powdery mildew and septoria leaf blotch. After two-time spraying, the technical efficiency of fungicides against powdery mildew reached 82.2—92.2%, against septoria leaf blotch up to 80.2%. The most effective against powdery mildew was the use of Alto Super 330 EC, EC (0.5 l / ha), Amistar Extra 280 SC, SC (0.75 l / ha) and tank mixture of Maxim 025 FS, FS (0.75 l / ha and 1.0 l / ha) with Horus 75 WG, VH (0.6 kg / ha). Against the septoria leaf blotch, the highest efficiency was shown by Alto Super 330 EC, EC (0.5 l / ha), Bumper Super, EC (0.8 l / ha) and Maxim 025 FS, FS (1.0 l / ha) + Horus 75 WG, WG (0.6 kg / ha). In addition, due to the reduction of disease severity, a positive effect of fungicides on the quality of the lawn was achieved and the projective coating increased to 92—93%. Conclusion. The use of fungicides contributes to the reduction of disease and the formation of quality herbs. The best indicators against flour dew and septoriosis of leaves were obtained for the treatment of Alto Super 330 EC, CE (0.5 l / ha) and tank Maxim 025 FS, tc.s. (1.0 l / ha) + Horus 75 WG, VH (0.6 kg / ha).

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Peculiarities of action and retrospective analysis of fungicides efficacy for protection of soft winter wheat against leaf diseases

Plant Protection News ◽

10.31993/2308-6459-2020-103-4-13741 ◽

2020 ◽

Vol 103 (4) ◽

pp. 224-232

Author(s):

N. A. Krupenko* ◽

I. N. Odintsova

Keyword(s):

Powdery Mildew ◽

Winter Wheat ◽

Retrospective Analysis ◽

Area Under The Curve ◽

Disease Development ◽

Septoria Leaf Blotch ◽

Leaf Blotch ◽

Biological Efficacy ◽

Two Component ◽

Soft Winter Wheat

The data on the efficacy of 40 fungicides for protection of soft winter wheat against leaf diseases during 2010–2019 are demonstrated. Biological efficacy is calculated based upon the area under the curve of disease development. Biological and economical efficacy of those compounds has been analyzed depending on the number of components, as well as chemical classes of active agents in those compounds. The highest biological efficacy of one-component fungicides against powdery mildew has been recorded for those containing proquinazid, tebuconazole and metrafenone – 69.9–79.3 %. Among 23 two-component fungicides the higher efficacy (82.1–84.3 %) against powdery mildew has been recorded for the fungicides containing azole combined with morpholine. Biological efficacy against Septoria leaf blotch has varied from 64.7 to 88.0 % depending on fungicide composition. Among three-component fungicides the efficacy against powdery mildew has varied from 59.5 to 82.8 %, and against Septoria leaf blotch it has varied from 59.8 to 89.9 %. As a result of the diseases severity decrease due to the fungicide application the saved yield has reached 9.9 centner of grain per hectare.

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Practical application of integrated disease management

Plant Protection Science ◽

10.17221/10358-pps ◽

2002 ◽

Vol 38 (SI 1 - 6th Conf EFPP 2002) ◽

pp. 212-220 ◽

Cited By ~ 1

Author(s):

V. Zinkernagel ◽

H. Hausladen ◽

H. Habermeyer

Keyword(s):

Decision Support ◽

Disease Management ◽

Powdery Mildew ◽

Tan Spot ◽

Integrated Disease Management ◽

Practical Application ◽

Septoria Leaf Blotch ◽

Leaf Blotch ◽

Advisory Service ◽

Glume Blotch

A decision support system for cereal diseases and late blight of potatoes has been developed at the Chair of Phytopathology, Technische Universität München. The Wheat and Barley Prognosis System has been in use for many years by the Bavarian official advisory service. It is based on an exact diagnosis and established biological thresholds influenced by weather. Certain fungicides are recommended also covering diseases which have not reached the threshold. Diseases under consideration are eye spot disease, powdery mildew, Septoria leaf blotch, Septoria leaf and glume blotch, tan spot, brown and yellow rusts.The PhytophthoraModel Weihenstephan consists of two parts, weather based prognosis and monitoring in the unsprayed control plots. Spraying recommendations are given based on the results of the above-mentioned parts and considering cultivar behaviour and blight development in the field. The first spraying in the season as well as the timing of the following ones are crucial. This model does not give any recommendations regarding which active ingredient should applied. However there is a distinction made with regard to contact (protective) fungicides and systemic fungicides. The PhytophthoraModel Weihenstephan has been in use for several years in Germany as well as in Austria.

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Yield and resistance to leaf diseases of modern winter bread wheat varieties under the limiting influence of biotic factors

Genetičnì resursi roslin (Plant Genetic Resources) ◽

10.36814/pgr.2020.27.01 ◽

2020 ◽

pp. 11-25

Author(s):

A.V. Yarosh ◽

V.K. Riabchun ◽

O.O. Chetveryk

Keyword(s):

Powdery Mildew ◽

Leaf Rust ◽

Bread Wheat ◽

High Yield ◽

Sources Of Resistance ◽

Septoria Leaf Blotch ◽

Leaf Blotch ◽

Winter Bread Wheat ◽

Brown Leaf ◽

Group Resistance

Aim. To identify new sources of resistance of winter bread wheat to powdery mildew,Septoria leaf blotch, brown leaf rust and of high yield capacity under the conditions of the northeastern part of the Left-Bank Forest-Steppe of Ukraine. Results and Discussion. The study of modern varieties of winter bread wheat onepiphytoties identified 88 sources with high (7-9 points) individual resistance to leaf diseases wereidentified, including 40 sources of resistance to powdery mildew, 20 sources of resistance to Septoria leaf blotch, and 28 sources of resistance to brown leaf rust. We selected 12 accessions of the highest breeding value due to their group resistance to powdery mildew, Septoria leaf blotch and brown leaf rust, among which domestic accessions bred by the Institute of Plant Physiology and Genetics of NAS of Ukraine and the VM Remeslo Myronivka Institute of Wheat of NAAS were predominant. As to foreign institutions, varieties bred at the RUE "Scientific and Practical Center for Agriculture of Belarus of NAS" stood out. Among the mid-tall sources of group resistance to powdery mildew, Septoria leaf blotch and brown leaf rust, three domestic genotypes with high yields (116-155% related to the check variety) were distinguished: Darynka Kyivska,Amina, Vezha Myronivska (UKR). Among the semi-dwarfs, Novosmuhlianka and Koliada (UKR) were the best varieties in terms of yield (152% related to the check variety). Conclusions. It was determined that there were moderate or strong positive correlationsbetween the resistance of the winter bread wheat accessions under investigation to leaf diseases on epiphytoties and yield capacity (r = 0.47-0.60) with the greatest significance (P <0.01). At thesame time, Septoria-induced reduction in the yields was more conspicuous than that caused by brown leaf rust and especially by powdery mildew. The identified winter bread wheat sources of resistance to powdery mildew, Septoria leaf blotch, and brown leaf rust as well as of high yield

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