Abstract
Field experiments were conducted during the 1992 and 1993 growing seasons in 13 commercial fields in Iowa to assess the efficacy of foliar applications of fungicides to seed corn for control of common rust, Puccinia sorghi, and northern leaf spot, Bipolaris zeicola. Chlorothalonil, mancozeb, and/or propiconazole sprays were initiated at growth stage (GS) 2.5, GS 4.0, or approximately 2 weeks before detasseling, and applications were repeated up to five times at various growth stages. The majority of fungicide treatments resulted in an increase in salable seed units (1 unit = 80,000 seeds) compared to untreated control treatments. The greatest increase in salable seed occurred in the large and medium seed size units. Although disease severity on the final assessment date in both years and standardized area under the disease progress curve in 1993 were significantly higher (P ≤ 0.05) in untreated control plots than in fungicide-treated plots in all experiments, the best disease control was provided by 5 applications of chlorothalonil or 2 to 4 applications of chlorothalonil, mancozeb, or propiconazole initiated on the first spray date.
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Claims 5
Claim · model-written summary
Most fungicide treatments increased salable seed units compared with untreated control treatments.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- fungicide treatmentse2
- Outcome
- salable seed unitse2
- Direction
- increasee2
- Comparator
- untreated control treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“foliar applications of fungicides to seed corn for control of common rust, Puccinia sorghi, and northern leaf spot, Bipolaris zeicola”
e2“The majority of fungicide treatments resulted in an increase in salable seed units (1 unit = 80,000 seeds) compared to untreated control treatments”
Claim · model-written summary
The greatest increase in salable seed occurred in the large and medium seed size units.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- salable seede3
- Direction
- greatest increasee3
- Qualifier
- in the large and medium seed size unitse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“foliar applications of fungicides to seed corn for control of common rust, Puccinia sorghi, and northern leaf spot, Bipolaris zeicola”
e3“The greatest increase in salable seed occurred in the large and medium seed size units”
Claim · model-written summary
Disease severity and standardized AUDPC in 1993 were significantly higher in untreated control plots than in fungicide-treated plots.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- fungicide-treated plotse4
- Interactor
- Puccinia sorghi
Puccinia sorghie1pathogen - Second interactor
- Bipolaris zeicola
Bipolaris zeicolae1pathogen - Outcome
- disease severity on the final assessment date in both years and standardized area under the disease progress curve in 1993e4
- Direction
- highere4
- Qualifier
- P ≤ 0.05e4
- Comparator
- untreated control plotse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“foliar applications of fungicides to seed corn for control of common rust, Puccinia sorghi, and northern leaf spot, Bipolaris zeicola”
e4“disease severity on the final assessment date in both years and standardized area under the disease progress curve in 1993 were significantly higher (P ≤ 0.05) in untreated control plots than in fungicide-treated plots in all experiments”
Claim · model-written summary
Five applications of chlorothalonil gave the best disease control.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- 5 applications of chlorothalonile5
- Outcome
- disease controle5
- Direction
- beste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“foliar applications of fungicides to seed corn for control of common rust, Puccinia sorghi, and northern leaf spot, Bipolaris zeicola”
e5“the best disease control was provided by 5 applications of chlorothalonil or 2 to 4 applications of chlorothalonil, mancozeb, or propiconazole initiated on the first spray date”
Claim · model-written summary
Two to four applications of chlorothalonil, mancozeb or propiconazole started at the first spray date gave the best disease control.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- 2 to 4 applications of chlorothalonil, mancozeb, or propiconazole initiated on the first spray datee5
- Outcome
- disease controle5
- Direction
- beste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“foliar applications of fungicides to seed corn for control of common rust, Puccinia sorghi, and northern leaf spot, Bipolaris zeicola”
e5“the best disease control was provided by 5 applications of chlorothalonil or 2 to 4 applications of chlorothalonil, mancozeb, or propiconazole initiated on the first spray date”
The same questions in other papers
mancozeb · control · Zea mays (maize)Results agree
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- positive
- positive
propiconazole · control · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- positive
- positive
application · control · Zea mays (maize)Results agree
14 papers in the same direction as this paper
- positive
- positive
- positive
11 papers more in this group
See all 15 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.