The economics of foliar fungicide applications in winter wheat in Northeast Texas

López, J.; Rojas, Kandy; Swart, James

doi:10.1016/j.cropro.2014.09.007

Cited by 35 publications

(21 citation statements)

References 22 publications

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“…This increase of grain yield is the result of the efficacy of the foliar fungicide to control the disease and limits its effects. The results corroborate those reported by Lopez et al and Bhatta et al [10,15], which indicates that foliar fungicide application increase grain yield by about 10 to 50% in bread wheat. However, resistant genotypes showed similar grain yield between treated and untreated plots (belong to the same classes; Table 4).…”

Section: Effect Of Genetic Resistance and Fungicide Application On Yisupporting

confidence: 83%

Yellow Rust Effects on Grain Yield, and Yield Components of Some Spring Bread Wheat Cultivars under Rainfed Conditions

Sebei¹,

Ferjaoui²,

Bchini³

2018

WJAR

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Stripe rust caused by Puccinia striiformis, is currently the major foliar disease of spring bread wheat (Triticum aestivum L.) in Tunisia, causing serious yield losses and affecting grain quality. Farmers often use foliar fungicide application or resistant cultivars to counter yield loss, however, this is hampered by a lack of resistant varieties. To investigate the effects of genetic resistance and foliar fungicide application on disease level and yield components, six improved varieties were evaluated at the regional experimental station in Beja during three consecutive growing seasons. Under natural stripe rust infection, three varieties were detected as completely resistant and the others are susceptible. The pathogen affected the leaf area in the susceptible varieties and reduces the above ground biomass at harvest, seed weight and grain yield. Fungicide application reduces the disease severity on the sensitive genotypes and improves biomass, seed weight, grain yield, and harvest index. Yield benefits were much greater in the use of resistant genotypes than fungicide application on the susceptible varieties; consequently the resistance to stripe rust can have more significant benefits to farmer and to the wheat industry.

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Section: Effect Of Genetic Resistance and Fungicide Application On Yisupporting

confidence: 83%

Yellow Rust Effects on Grain Yield, and Yield Components of Some Spring Bread Wheat Cultivars under Rainfed Conditions

Sebei¹,

Ferjaoui²,

Bchini³

2018

WJAR

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“…The use of fungicides is often a cost‐effective means of disease control and yield protection in agricultural crops (Hardwick et al , ; Pemsl & Waibel, ; Wiik & Rosenqvist, ; Lopez et al , ). However, this method of disease control applies a selection pressure on pathogen populations to develop fungicide resistance (Brent & Hollomon, ).…”

Section: Introductionmentioning

confidence: 99%

“…The use of fungicides is often a cost-effective means of disease control and yield protection in agricultural crops (Hardwick et al, 2001;Pemsl & Waibel, 2007;Wiik & Rosenqvist, 2009;Lopez et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Identifying when it is financially beneficial to increase or decrease fungicide dose as resistance develops: An evaluation from long‐term field experiments

et al. 2020

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As the frequency of fungicide resistant strains increases in a pathogen population, there is a change in the shape of the response curve of disease severity to fungicide dose. We showed previously, in a theoretical analysis, that such changes can result in an increase or a decrease in the economically optimal dose of fungicide; this depends on how the response curve changes (which is determined jointly by the degree of insensitivity and frequency of a new strain) and the shape of the disease–yield loss relationship (which is a characteristic of the pathogen and crop). Here, we use field dose–response data to estimate economic optimum doses for the control of Zymoseptoria tritici on wheat over a 21‐year period. Resistance to fungicide developed to varying degrees against three modes of action (MoA). Changes of optimal dose across years differed according to MoA, but there was an underlying pattern of initial increase in optimal dose, followed by a decrease (ultimately to zero dose at high levels of fungicide resistance). Fungicides are often applied in mixture and analysis shows that, provided the mixture partner is effective, the economic optimal dose increases less as resistance develops than when the fungicide is used as solo product; however, the subsequent decrease in optimal dose remains.

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“…Marginal returns ranged from $239.3/ha to $377.4/ha between two years (Tables 1 and 2). Two-year average net returns of $52.09/ha was reported from a study involving one foliar spray of fungicide TebuStar® 3.6 L/ha on four soft-red winter wheat cultivars [22]. Net returns of up to $239/ha with foliar application of fungicides on winter wheat was also reported [23].…”

Section: Fungicide Spray Application and Marginal Returnmentioning

confidence: 99%

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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The economics of foliar fungicide applications in winter wheat in Northeast Texas

Cited by 35 publications

References 22 publications

Yellow Rust Effects on Grain Yield, and Yield Components of Some Spring Bread Wheat Cultivars under Rainfed Conditions

Yellow Rust Effects on Grain Yield, and Yield Components of Some Spring Bread Wheat Cultivars under Rainfed Conditions

Identifying when it is financially beneficial to increase or decrease fungicide dose as resistance develops: An evaluation from long‐term field experiments

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

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