Abstract
Tan spot, caused by Pyrenophora tritici-repentis (Died.) Drechs, is a serious constraint on wheat yields in the Southern Cone region of South America. A 2-year experiment was conducted to evaluate fungicide deposition, disease development and grain yield. Three spray nozzles were evaluated: an air-induction flat fan (AI), a wide-angle flat fan (TT), and an extended-range flat fan (XR). A systemic fungicide containing azoxystrobin and cyproconazole was used in both years. Tan spot severity and the area under non-green leaf area disease progress curve (AUNGLA) were analysed. There were no significant differences in deposition among nozzles, and no significant interactions between nozzles and leaf layers in the first year. In both years, AUNGLAs were similar for the three nozzles types, and the tan spot severity in untreated plots was significantly higher than in fungicide-applied plots. Grain yield was higher in the fungicide-applied plots, and there were no significant differences among nozzles in both years. Droplet size had no effect on the fungicide’s efficacy for tan spot control in Uruguay across three susceptible wheat cultivars. The use of drift-reducing nozzles and a systemic fungicide in these trials led to satisfactory performance for spray deposition, canopy penetration and control of the tan spot disease of wheat in the same way as expected from conventional nozzles.
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Claims 7
Claim · model-written summary
There were no significant differences in fungicide deposition among spray nozzles in the first year.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- nozzlese2
- Outcome
- depositione2
- Direction
- no_changeinferrede2
- Qualifier
- in the first yeare2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“There were no significant differences in deposition among nozzles, and no significant interactions between nozzles and leaf layers in the first year”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
Claim · model-written summary
There were no significant interactions between nozzles and leaf layers in the first year.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- nozzlese2
- Outcome
- interactions between nozzles and leaf layerse2
- Qualifier
- in the first yeare2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“There were no significant differences in deposition among nozzles, and no significant interactions between nozzles and leaf layers in the first year”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
Claim · model-written summary
Area under the non-green leaf area disease progress curve was similar for the three nozzle types in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- three nozzles typese3
- Interactor
- Pyrenophora tritici-repentis
Pyrenophora tritici-repentise1pathogen - Outcome
- AUNGLAse3
- Direction
- no_changeinferrede3
- Qualifier
- In both yearse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“In both years, AUNGLAs were similar for the three nozzles types”
e1“caused by Pyrenophora tritici-repentis (Died.) Drechs”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
Claim · model-written summary
Tan spot severity was significantly higher in untreated wheat plots than in fungicide-applied plots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fungicidee4
- Interactor
- Pyrenophora tritici-repentisPyrenophora tritici-repentise1pathogen
- Outcome
- tan spot severitye4
- Direction
- highere4
- Comparator
- untreated plotse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the tan spot severity in untreated plots was significantly higher than in fungicide-applied plots”
e1“caused by Pyrenophora tritici-repentis (Died.) Drechs”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
Claim · model-written summary
Grain yield was higher in the fungicide-applied plots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fungicidee5
- Outcome
- Grain yielde5
- Direction
- highere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Grain yield was higher in the fungicide-applied plots, and there were no significant differences among nozzles in both years”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
Claim · model-written summary
Grain yield did not differ significantly among spray nozzles in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- nozzlese5
- Outcome
- Grain yielde5
- Direction
- no_changeinferrede5
- Qualifier
- in both yearse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Grain yield was higher in the fungicide-applied plots, and there were no significant differences among nozzles in both years”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
Claim · model-written summary
Droplet size had no effect on the efficacy of the fungicide for tan spot control in Uruguay across three susceptible wheat cultivars.
- Taxon
- wheatTriticum aestivume6
- Material
- three susceptible wheat cultivarse6
- Treatment
- Droplet sizee6
- Interactor
- Pyrenophora tritici-repentisPyrenophora tritici-repentise1pathogen
- Outcome
- efficacy for tan spot controle6
- Direction
- no_changeinferrede6
- Setting
- Uruguaye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Droplet size had no effect on the fungicide’s efficacy for tan spot control in Uruguay across three susceptible wheat cultivars”
e1“caused by Pyrenophora tritici-repentis (Died.) Drechs”
t0“Evaluation of spray nozzles for fungicidal control of tan spot in wheat”
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See all 262 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.