The effects of adding picoxystrobin, azoxystrobin and nitrogen to a triazole programme on disease control, flag leaf senescence, yield and grain quality of winter wheat

Ruske, R. E.; Gooding, M. J.; Jones, S. A.

doi:10.1016/s0261-2194(03)00113-3

Cited by 73 publications

(63 citation statements)

References 18 publications

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“…Interactions between T3 and N rate were observed at five sites (P < 0.10); at 100 kg N ha -1 , T3 increased kernel weight by 2.7% compared to the UTC, while at 170 kg ha -1 , T3 increased kernel weight by an average of 4.5%. Increased kernel weight with fungicide application has been reported in other research (Ruske et al, 2003a;Olesen et al, 2000;Kelley, 2001); this component probably contributed to the strong interactions on grain yield between N rate and fungicide strategy in the current study.…”

Section: Nitrogen Rate × Fungicide Interaction Effect On Winter Wheatsupporting

confidence: 73%

“…This was a synergistic response to high N and fungicide because the response was greater than the sum of responses for a high N rate (170 vs. 100) and inclusion of fungicides (no fungicide vs. three applications), or 0.48 and 0.67 Mg ha -1 , respectively. The synergism between N and fungicide has been reported in the literature, but the synergistic yield improvements have not been as great or consistent as those presented in this study, and most are reported from environments that traditionally practice intensive wheat management (Ruske et al, 2003a;Olesen et al 2000;Walters and Bingham, 2007;Delin et al 2008). In contrast, Olesen et al (2003b) reported yield increases with N rates and fungicide applications, but the study did not show any interaction between N application rate and fungicide.…”

Section: Resultssupporting

confidence: 48%

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Synergism of Nitrogen Rate and Foliar Fungicides in Soft Red Winter Wheat

et al. 2014

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Projected global demand for small grain cereals emphasizes the need for sustainable intensi cation with higher crop yields. Field studies on so red winter wheat (Triticum aestivum L.) examined interactions among three fertilizer N rates, eight fungicide application strategies, and various cultivars grown in nine eld environments in Ontario, Canada. A synergistic response occurred when a high rate of N was applied with a fungicide strategy that controlled disease. Overall, compared to a typical N rate of 100 kg ha -1 and no fungicide, yields increased by an average of 1.45 Mg ha -1 when N was applied at 170 kg ha -1 with the most intensive fungicide treatment pooled across sites. is yield response varied from 0.80 to 2.11 Mg ha -1 depending on eld site and pooled across cultivars. Fungicide strategies that included a T2 ( ag leaf timing) or T3 (anthesis timing) produced the highest yields across environments, especially at the high N rate and in most cultivars. e crop response to fungicide depended on the susceptibility of the cultivar to foliar disease and whether the eld environment was favorable for disease development. High N rates increased spike numbers and kernels spike -1 , whereas fungicides mainly increased kernel weight and kernels spike -1 . Prior to an economic analysis, results from this study indicates clear potential for increasing wheat performance by intensifying management with increasing N and deploying fungicide application strategies, especially in some cultivars and in high yielding environments that may be favorable for disease development.

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Section: Nitrogen Rate × Fungicide Interaction Effect On Winter Wheatsupporting

confidence: 73%

Section: Resultssupporting

confidence: 48%

Synergism of Nitrogen Rate and Foliar Fungicides in Soft Red Winter Wheat

et al. 2014

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“…These findings concur with the conclusions of previous studies (e.g., Gooding et al, 2000;Ruske et al, 2003Ruske et al, , 2004. Indeed, these authors have reported that the use of strobilurin and triazole fungicides consistently increased TGW and grain yield, namely because of the delay of senescence of the flag leaves.…”

Section: Discussionsupporting

confidence: 92%

“…The GPC was generally not affected by fungicide applications at Everlange (there was no clear trend found at Burmerange), supporting the conclusions of previous studies (e.g., Ruske et al, 2003Ruske et al, , 2004). Ruske et al (2004) reported an improvement of flour protein concentration after an additional 40 kg N ha −1 application at flag leaf emergence in winter wheat (cultivar Malacca) in United Kingdom.…”

Section: Discussionsupporting

confidence: 86%

Do single, double or triple fungicide sprays differentially affect the grain quality in winter wheat?

Jarroudi

Kouadio

Junk

et al. 2015

Field Crops Research

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a b s t r a c tFoliar fungicides in wheat are typically used to safeguard against economic losses from diseases. In this study, we assessed the effects of three fungicide spray regimes [single, double, and triple treatments] on four different grain quality parameters [thousand grain weight (TGW), test weight (TW), grain protein content (GPC), and Zeleny sedimentation volume (ZSV)] during the 2006-2009 period at two sites in Luxembourg. The fungicides used were generally a mix of chlorothalonil and triazoles. At Burmerange, (cultivar Cubus), the values of TGW, TW, GPC and ZSV ranged from 38 to 62 g, 67 to 83 kg hl −1 , 12.0% to 14.7% dry matter (DM), and 27 to 54 ml, respectively. Whereas, at Everlange (cultivar Achat), the ranges of TGW, TW, GPC and ZSV were 42 to 65 g, 65 to 81 kg hl −1 , 11.0% to 15.0% DM, and 21 to 66 ml, respectively. In more than 75% cases, the results indicate that fungicides did not significantly affect TW or ZSV at either sites (P > 0.05). However, there was a significant and positive fungicide effect on GPC in 2006 and 2009 at Burmerange, and only in 2006 at Everlange (P < 0.05). On the contrary, TGW was significantly affected at Burmerange in all years, except 2008 when a positive increase was observed compared to control plots; and in 2006 and 2007 at Everlange. Interestingly, when there was an effect of fungicides on a quality parameter, there was no difference among different fungicide treatments. Thus under conditions prevailing in Luxembourg, a single fungicide treatment applied with judicious timing generally resulted in statistically similar grain quality parameters when compared with a double or triple fungicide treatment.

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“…The appearance of leaf rust during grain filling decreases assimilate supply during post-anthesis by reductions in radiation interception/absorption (Waggoner and Berger 1987;Bryson et al 1997;Bancal et al 2007;Serrago et al 2009;Carretero et al 2010). These reductions determine fewer assimilates supplied per grain, inducing grainweight reductions (Cornish et al 1990;Gooding et al 1994Gooding et al , 2000Dimmock and Gooding 2002;Ruske et al 2003;Robert et al 2004;Pepler et al 2005;Serrago et al 2011). Although the hypothesis of assimilate supply reduction is the most accepted to explain grain weight decrease due to the appearance of late foliar diseases during grain filling, it has not been clearly established whether those reductions could be completely ascribed to source and/or sink limitations.…”

Section: Introductionmentioning

confidence: 99%

Source limitations due to leaf rust (caused by Puccinia triticina) during grain filling in wheat

Serrago

Miralles

2014

Crop Pasture Sci.

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Abstract. Late foliar diseases (especially leaf rust) reduce assimilate supply during post-anthesis, determining fewer assimilates per grain and thereby inducing grain weight reductions. Although the assimilate reduction hypothesis is the most accepted to explain decreases in grain weight due to late foliar diseases, it has not been clearly established whether those reductions could be completely ascribed to source limitations or whether diminished grain weight could be the consequence of reductions in grain weight potential. The objective of this work was to determine whether grain weight reductions due to leaf rust during grain filling could be associated with source-sink limitations. Two experiments (during 2007 and 2008 growing seasons) including healthy and diseased wheat crops were conducted under field conditions. Source-sink manipulation treatments and grain water content measurements were made to test the source-and sink-limitation hypotheses due to the appearance of late foliar diseases during grain filling. Leaf rust was induced to appear exclusively during grain filling, and in both years, it reduced grain yield and grain weight in both experiments. However, except for distal grains, there were no significant differences between healthy and diseased plots in maximum grain water content, indicating that late foliar diseases did not affect the potential size of the grains. The reserves stored in stems were remobilised to the growing grains in both healthy and diseased crops. However, the reserves remaining at physiological maturity were significantly reduced in diseased crops. Reduction in grain number by trimming the spikes increased the grain weight in diseased but not in healthy crops. Grain weight of trimmed spikes in diseased crops reached similar values to those of healthy crops. These results support the hypothesis that foliar diseases could cause source limitation for grain filling beyond differences in grain weight potential when the crops are severely affected by late foliar diseases such as leaf rust.

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The effects of adding picoxystrobin, azoxystrobin and nitrogen to a triazole programme on disease control, flag leaf senescence, yield and grain quality of winter wheat

Cited by 73 publications

References 18 publications

Synergism of Nitrogen Rate and Foliar Fungicides in Soft Red Winter Wheat

Synergism of Nitrogen Rate and Foliar Fungicides in Soft Red Winter Wheat

Do single, double or triple fungicide sprays differentially affect the grain quality in winter wheat?

Source limitations due to leaf rust (caused by Puccinia triticina) during grain filling in wheat

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