Effect of Late-Season Fungicide Application on Grain Yield and Seed Size Distribution in Wheat and Barley

Entz, Martin H.; Berg, C. G. J. van den; Stobbe, E. H.; Rossnagel, B. G.; Lafond, G. P.; Austenson, H. M.

doi:10.4141/cjps90-086

Cited by 23 publications

(21 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings are consistent with those of Entz et al (1990), Stover (1990) and Bockus and Claassen (1994) where yield losses were reduced following application of propiconazole or tebuconazole to wheat affected by P. tritici-repentis. In Western Australia, single applications of tebuconazole at 63 g a.i./ha or 125 g a.i./ha significantly reduced yield losses in successive years.…”

Section: Discussionsupporting

confidence: 91%

“…However, in the 1990 season, where lower disease severities were recorded, only four applications of tebuconazole throughout the season significantly reduced the yield loss due to yellow spot compared with the untreated control. Inconsistent field results between seasons have previously been reported following fungicide application for the control of yellow spot (Watkins et al 1982;Entz et al 1990). The variable results are most likely due to the fluctuating disease levels present in the experiments between seasons.…”

Section: Discussionmentioning

confidence: 67%

See 1 more Smart Citation

Fungicidal control of Pyrenophora tritici-repentis in wheat

Colson

Platz

Usher

2003

Austral. Plant Pathol.

View full text Add to dashboard Cite

Abstract. The use of fungicides to control yellow spot in wheat, caused by Pyrenophora tritici-repentis, in the northern wheat region of Australia, was examined in three field experiments. Field conditions were conducive to disease development. This was aided by spreading stubble infested with P. tritici-repentis and by regular spray irrigations, and moderate yellow spot epidemics resulted in all 3 years. Within the three experiments, 12 fungicides were evaluated for their ability to reduce the impact of yellow spot on grain yield. Single spray applications of the fungicides, some at varying rates, were made at 90% flag leaf emergence. Treated controls had 3-4 applications of propiconazole at 62 mL a.i./ha or tebuconazole at 72.5 mL a.i./ha throughout the season. Grain yield losses of up to 59% were recorded in the untreated plots. A reduction in grain size rather than a decrease in the number of grains was responsible for the yield losses. Yield losses were significantly lower following application of flusilazol, prochloraz, propiconazole and tebuconazole in cvv. Hartog and Banks, in the first experiment. Application of azoxystrobin at 125 and 250 g a.i./ha, difenoconazole at 125 mL a.i./ha, epoxyconizole at 72 mL a.i./ha, propiconazole at 125 mL a.i./ha, tebuconazole at 125 mL a.i./ha or trifloxystrolin at 150g a.i./ha significantly reduced losses in the third experiment, sown with cv. Sunstate. This work has demonstrated that fungicidal control of yellow spot in wheat in the northern region can be a viable control option in years of high yield potential and high disease pressure.A P 0 3 0 1 0 C o n t r o l o f P y r e n o p h o r a t r i t i c i -r e p e n t i s E . S . C o l s o n e t a l .

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 67%

Fungicidal control of Pyrenophora tritici-repentis in wheat

Colson

Platz

Usher

2003

Austral. Plant Pathol.

View full text Add to dashboard Cite

show abstract

“…Results of experiments presented here corroborate reports (Entz et al 1990;Lawless 1990;Bockus et al 1992;Moes et al 1992) that large-seed yields of wheat can be significantly increased by a single foliar fungicide application. Increases are usually only significant when disease severity is moderate to severe with much lower or insignificant increases when disease is light (Entz et al 1990;Moes et al 1992).…”

Section: Discussionsupporting

confidence: 90%

“…Increases are usually only significant when disease severity is moderate to severe with much lower or insignificant increases when disease is light (Entz et al 1990;Moes et al 1992). Results for the Manhattan location support these findings because disease severity was light and no significant increases in large-seed production occurred for any cultivar following fungicide application.…”

Section: Discussionmentioning

confidence: 68%

Time of application and winter wheat genotype affect production of large seed after fungicide application

Bockus¹,

Bowden²,

Claassen³

et al. 1997

Can. J. Plant Sci.

View full text Add to dashboard Cite

winter wheat genotype affect production of large seed after fungicide application. Can. J. Plant Sci. 77: 567-572. Two field experiments were established to compare four times of fungicide application (flag leaf emergence, boot, fully headed, and milky ripe) for improving production of large seed. Quadratic models fit the data when large-seed (≥0.238-cm diameter) yields were regressed against time of fungicide application. The optimum time to apply foliar fungicides was between boot and fully headed. Four other field experiments were established to compare large-seed yields after fungicide application on 12 cultivars differing in susceptibility to foliar diseases. With moderate foliar disease pressure, linear models fit the data when increases in large seed due to fungicide were regressed against Kansas Cooperative Extension Service disease ratings. In conjunction with the expected price of seed wheat, these models can be used to help decide whether foliar fungicide is warranted.

show abstract

“…Previous studies indicated that foliar fungicide applied at stem elongation or flag leaf emergence can effectively suppress SFNB and improve grain yield and quality (van den Berg and Rossnagel 1990;Jayasena et al 2002;Poole and Arnaudin 2014). However, for NFNB, increases in grain yield and quality can be achieved by application of foliar fungicide at head emergence (Entz et al 1990). Information on optimum application timing would be useful in developing economic SFNB management strategies.…”

Section: Introductionmentioning

confidence: 97%

Spot form of net blotch suppression and yield of barley in response to fungicide application in the Wimmera region of Victoria, Australia

McLean¹,

Weppler²,

Howlett

et al. 2015

Australasian Plant Pathol.

View full text Add to dashboard Cite

Spot form of net blotch (SFNB), caused by Pyrenophora teres f. maculata caused up to 25 % (0.9 t/ha) grain yield loss to barley and significant reductions in grain quality parameters such as retention (13 %), screenings (5 %) and grain weight (6 %) in the Wimmera region of Victoria during 2005-11. Spot form of net blotch was suppressed by varying degrees between experiments, seasons, and crop growth stages when foliar fungicide (propiconazole) was applied. Of single applications, treatment at the stem elongation (Z31) or flag leaf (Z39) growth stages generally provided the greatest disease suppression. Single application at tillering (Z25) or ear emergence (Z55) were generally ineffective. Eight chemical seed treatments registered for use in barley were tested as potential low cost management options for SFNB. Four seed treatments reduced SFNB severity in the glasshouse, but none were effective in the field.

show abstract

Effect of Late-Season Fungicide Application on Grain Yield and Seed Size Distribution in Wheat and Barley

Cited by 23 publications

References 10 publications

Fungicidal control of Pyrenophora tritici-repentis in wheat

Fungicidal control of Pyrenophora tritici-repentis in wheat

Time of application and winter wheat genotype affect production of large seed after fungicide application

Spot form of net blotch suppression and yield of barley in response to fungicide application in the Wimmera region of Victoria, Australia

Contact Info

Product

Resources

About