Effectiveness of fungicides in controlling stripe rust, leaf rust, and black point in soft white spring wheat

Conner, Robert L.; Kuzyk, A. D.

doi:10.1080/07060668809501706

Cited by 39 publications

(31 citation statements)

References 10 publications

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“…Wheat yields on the Canadian prairies are reduced more than 5% annually by root rot diseases (Ledingham et al 1973) and foliar diseases of wheat may decrease yields by up to 18% in Canada (Sutton 1985;Connor and Kuzyk 1988). The fungus Rhizoctonia solani is reported to reduce marketable yields of potato by over 20% (Banville 1989).…”

Section: Mots Clésmentioning

confidence: 99%

Fungal plant pathogens and soil biodiversity

Reeleder¹

2003

Can. J. Soil. Sci.

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The role of biodiversity as it affects the control of soil-borne fungal pathogens is discussed. Soil-borne fungal plant pathogens have often proven difficult to manage with conventional methods of disease control. Nonetheless, researchers have characterized several naturally occurring “disease-suppressive” soils where crop loss from disease is less than would otherwise be expected. Suppressive soils can also result from the incorporation of various amendments into soil. In most cases, disease control in such soils has been shown to be biological in nature; that is, soil organisms appear to directly or indirectly inhibit the development of disease. Increased knowledge of the identity and functioning of these organisms may support the development of techniques that can be used to develop suppressiveness in soils that are otherwise disease-conducive. Populations of pathogens themselves have been shown to exhibit considerable genetic diversity; the ability of populations to respond to disease control measures should be considered when developing a management strategy. New molecular techniques can be exploited to better characterize soil communities, including the pathogens themselves, as well as community responses to various disease control options. The contributions of Canadian researchers to these areas are discussed and models for further study are proposed. Key words: Biocontrol, molecular technologies, functional diversity, integrated pest management

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Section: Mots Clésmentioning

confidence: 99%

Fungal plant pathogens and soil biodiversity

Reeleder¹

2003

Can. J. Soil. Sci.

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“…Various fungicides are used to reduce the yield loss of wheat due to rust, but with varying efficacies [9]. A single spray of various fungicides at the first appearance of disease symptoms was reported to be effective in reducing the loss of wheat yield due to stripe rust up to 38% and the loss in 1,000-grain weight (TGW) of up to 24% was achieved in the same experiment by spraying fungicides twice in Central Asia [10].…”

Section: Wheat Yield Response To Foliar Fungicide Application Againstmentioning

confidence: 92%

Wheat Yield Response to Foliar Fungicide Application against Leaf Rust Caused by Puccinia triticina

Joshi¹,

Ullah²,

Rehman³

et al. 2017

JAST-A

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Abstract:A study was conducted on reducing the yield loss of wheat due to leaf rust caused by Puccinia triticina with foliar application of fungicides during the 2014-2015 and 2015-2016 growing seasons at the Wheat Research Institute in Faisalabad, Pakistan. Three fungicides: Folicur (tebuconazole) at 300 mL/ha, Nativo (tebuconazole + trifloxystrobin) at 300 g/ha and Tilt (propiconazole) at 500 mL/ha were applied single or two times to Morocco and Sehar-06 wheat varieties used in the trial. The trial plots were first sprayed at the Zadok's scale (ZS) 3 stage and second sprayed between ZS 4.3 and 5.4 stages. The greenness of the trial crop was measured using GreenSeeker. Foliar application of fungicides significantly reduced the loss of grain yield and 1,000-grain weight (TGW) of wheat due to leaf rust in comparison to the control without fungicides application. Of the three fungicides, two times spray of Nativo reduced the grain yield loss of leaf rust susceptible mega wheat variety Sehar-06 by 45%-56% and the loss of TGW by 42%, also giving the highest marginal return in the trial. Single application of Nativo was equally effective as two times spray of Folicur in reducing the loss of wheat grain yield. Two times spray of Folicur was found to be the second choice of fungicide for reducing the yield loss of wheat. The research identified suitable fungicides for reducing the yield loss of wheat due to leaf rust and also generated important scientific knowledge required to manage a sudden outbreak of leaf rust to ensure food security.

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“…Of particular interest are compounds such as Alto® and Folicur®, also registered at the same dosages against stripe rust, which ranked highly in protection against leaf rust damage across all parameters measured. Previous studies showed that fungicides may differ in their efficacy against different wheat diseases (Hardwick et aI., 1994;Mercer & Ruddock, 1996;Conner & Kuzyk, 1988;Turner, Elcock & Hilms, 1996;Kalappanavar & Patil, 1997;Boshoff, Pretorius & Swart, 1999;Cook et af., 1999). This may be attributed to differences in their mechanism of action, and features such as net-uptake or degradation, and systemic ability of fungistatic compounds (Lyr, 1995;Parry, Jenkinson & Mcleod, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Under epidemic conditions wheat leaf rust causes reductions in yield components including kernel mass, kernels per square meter, and grain fill rate, which individually or collectively may result in yield losses of between 7 and 63%, depending on cultivar susceptibility (Conner & Kuzyk, 1988;Dannenberg et ai., 1989;Eversmeyer & Kramer, 1996;Sayre et ai., 1998;Singh, 1999). The effect of foliar rusts on plant development and wheat quality depends on the onset of disease, yield potential and the level of cultivar resistance (Bever, 1937;Ash & Brown, 1990;Gaunt & Cole, 1991;Schultz & Line, 1992;Murray, Ellison & Watson, 1995;Ma & Singh, 1996;Sayre et ai., 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Leaf rust, caused by Puccinia triticina Eriks., is a foliar pathogen of wheat (Triticum aestivum L.) with the potential to cause extensive losses in grain yield (Wiese, 1987;Conner & Kuzyk, 1988;Dannenberg, Eversmeyer & Kramer, 1989;Khan & Trevathan, 1997;Sayre et ai., 1998;Cook, Hilms & Vaughan, 1999). Under epidemic conditions wheat leaf rust causes reductions in yield components including kernel mass, kernels per square meter, and grain fill rate, which individually or collectively may result in yield losses of between 7 and 63%, depending on cultivar susceptibility (Conner & Kuzyk, 1988;Dannenberg et ai., 1989;Eversmeyer & Kramer, 1996;Sayre et ai., 1998;Singh, 1999).…”

Section: Introductionmentioning

confidence: 99%

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The impact of leaf rust on spring wheat in the winter rainfall region of South Africa

Boshoff¹,

Pretorius

Niekerk³

2002

South African Journal of Plant and Soil

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In a field trial established near Malmesbury in the Western Cape during 1999 the effect of Puccinia triticina on yield and quality of the bread wheat (Triticum aestivum L.) cultivar SST 75 was determined. Information on the efficacy of different foliar fungicide treatments in controlling leaf rust was also obtained. The fungicides bromuconazole (140 g a.i. ha-1 ), epoxiconazole/carbendazim (112.5/112.5 g a.i. ha-I ), flusilazole/carbendazim (1001 50 g a.i. ha-I ), flutriafol (125 g a.i. ha-I ), propiconazole (100 g a.i. ha-I ), cyproconazole (40 g a.i. ha-I ), tebuconazole (187.5 g a.i. ha-I ), and tebuconazole/carbendazim (125/100 g a.i. ha-I ) were sprayed in single applications at either growth stage 16 and 37, and in double applications at both these growth stages. The application of the eight fungicides at both seven and flag leaf stages resulted in a mean decrease of 65% in the AUDPC, calculated for leaf rust severity. In the control plots 23% siftings (seed <1.5 mm) were obtained followed by 20%, 13% and 12% for the seven leaf, flag leaf and combined seven and flag leaf treatments, respectively. Combined seven and flag leaf treatments resulted in a mean yield increase of 56%, followed by 50% and 15% for the flag leaf and seven leaf treatments, respectively. Over treatments applied, yield increases varied from 24% for bromuconazole to 53% for epoxiconazole/carbendazim. Yield was negatively correlated with the AUDPC (R = -0.88 [77% of variance accounted for]). The application of the flag leaf and combined seven and flag leaf treatments resulted in a significant increase in the hectolitre mass (kg hi-I). Protein content, over fungicides applied, varied from 12.5% for the combined seven and flag leaf treatments to 12.8% for the seven leaf treatment. The results of the study emphaSised the economic importance of leaf rust as well as the value of controlling foliar rust diseases genetically.

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Effectiveness of fungicides in controlling stripe rust, leaf rust, and black point in soft white spring wheat

Cited by 39 publications

References 10 publications

Fungal plant pathogens and soil biodiversity

Fungal plant pathogens and soil biodiversity

Wheat Yield Response to Foliar Fungicide Application against Leaf Rust Caused by Puccinia triticina

The impact of leaf rust on spring wheat in the winter rainfall region of South Africa

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