Effect of Foliar Fungicides on Corn with Simulated Hail Damage

Bradley, Carl A.; Ames, Keith A.

doi:10.1094/pdis-94-1-0083

Cited by 40 publications

(30 citation statements)

References 22 publications

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“…At Leonard in 2010, severity of northern corn leaf blight was affected by the timing of foliar B application, but not by the amount of B applied (Table 10). A reduction in the severity of common rust, gray leaf spot, and northern corn leaf blight in corn due to pyraclostrobin, not B was found by some other researchers [36,50]. The V4-V6 B application at 2.24 kg·ha −1 and all VT applications increased the severity of northern corn leaf blight compared to the non-treated control.…”

Section: Resultsmentioning

confidence: 64%

Effect of Foliar Boron Fertilization of Fine Textured Soils on Corn Yields

Kaur

Nelson

2014

Agronomy

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Boron (B) is an essential micronutrient needed for normal plant growth and development. To evaluate the response of corn to foliar B applications at V4-V6 (4-6 leaves with visible collars) and VT (tasseling) growth stages on fine textured soils, a field experiment was conducted at four sites from 2008 to 2010 in Northeast Missouri. The treatments included a non-treated control; V4-V6 applied B at 0.56, 1.12 and 2.24 kg·ha −1 ; and VT applied B at 0.28, 0.56 and 1.12 kg·ha −1 . Foliar B, applied at V4-V6 at 2.24 kg·ha −1 , resulted in higher yields than VT applications. No significant differences in yield were found for B applications at different timings for concentrations of 0.56 and 1.12 kg·ha −1. Boron applied at V4-V6 and 2.24 kg·ha −1 increased yield 0.29 Mg·ha −1 compared to the non-treated control. The B applications at VT increased ear leaf tissue B concentration compared to V4-V6 applications and non-treated control, but it had no significant effect on corn yields. No significant difference between B treatments was observed for grain oil, protein, starch or extractable starch concentration; severity of anthracnose stalk rot or common rust; and ear tip fill. The B application of 2.24 kg·ha −1 at V4-V6 decreased the severity of gray leaf spot, but increased the severity of northern leaf blight compared to the non-treated control. Boron applied at V4-V6 at 2.24 kg·ha −1 was the most beneficial timing and concentration evaluated in these fine textured soils. OPEN ACCESSAgronomy 2015, 5 2

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Section: Resultsmentioning

confidence: 64%

Effect of Foliar Boron Fertilization of Fine Textured Soils on Corn Yields

Kaur

Nelson

2014

Agronomy

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“…Theoretical increases in LAI of up to 6 to 6.5 increase intercepted photosynthetically active radiation (IPAR) to values between 90 and 95% (Williams et al, 1965;Gallo and Daughtry, 1986). Bradley and Ames (2010) measured greater LAI at V12 in undefoliated corn plants than in corn plants defoliated between 25 and 30% (LAI values of 3.2 vs. 2.3, respectively). Bradley and Ames (2010) measured greater LAI at V12 in undefoliated corn plants than in corn plants defoliated between 25 and 30% (LAI values of 3.2 vs. 2.3, respectively).…”

Section: Hail Damage Impacts On Corn Grain Yieldmentioning

confidence: 93%

“…In the last 10 yr, fungicides have been promoted as enhancers of plant tolerance to hail damage (Bradley and Ames, 2010;Fernandez-Cornejo et al, 2014). Working in Illinois with a 110-RM hybrid with moderate susceptibility to grey leaf spot (Cercospora zeae-maydis Tehon & E.Y.…”

Section: Hail Damage Effects and Plant Disease Pressurementioning

confidence: 99%

Hail Damage Impacts on Corn Productivity: A Review

et al. 2019

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Hail influence on corn (Zea mays L.) yield depends on defoliation timing and severity. Complete defoliation during early vegetative stages can have minimum yield effects if plants’ growing point is not affected but can generate some delays in the planting to flowering period. Low‐severity defoliations after V10 can reduce yield up to 30%. Higher severities gradually increase yield penalties to a peak around flowering and decrease progressively during the grain‐filling period. Charts to estimate the percentage of corn yield loss due to defoliation developed in the late 1960s are still accurate in most situations but fail to describe particular situations. Defoliation around VT commonly affects time to silking, anthesis–silking interval, and plant growth rate, but not time to anthesis, and is commonly explained by lower kernel number (KN). Defoliation at R2 commonly affects kernel weight (KW), without changing KN. However, several studies showed a reduction in both KW and KN with R2 defoliations. Under low plant disease pressure, fungicides applied around VT do not help reduce any yield defoliation impact. Specific genotypes, row spacing, and hybrid maturity can influence crop yield defoliation responses. More studies are warranted to confirm the potential for narrow rows to reduce yield loss after defoliation.

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“…High-yield corn production systems have applied fungicide (Wegulo et al, 1997;Bradley & Ames, 2010;Nelson & Meinhardt, 2011) to maximize plants' photosynthetic efficiency and meet a growing demand for food, fuel, and fiber. Several field experiments have evaluated how fungicide applications affect hybrid corn (Bowen & Pedersen, 1988;Bair et al, 1990;Ward et al, 1997;Munkvold et al, 2001;Bradley & Ames, 2010;Nelson & Meinhardt, 2011), hybrid seed corn (Wegulo et al, 1997), and sweet corn (Pataky & Eastburn, 1993;Shah & Dillard, 2010) to manage diseases such as gray leaf spot (Cercospora zea-maydis), common rust (Puccinia sorghi), and northern leaf blight (Exserohilum turcicum). These foliar diseases have reduced corn yields up to 70% (Rodriguez-Ardon et al, 1980;Perkins & Pedersen, 1987;Bair et al, 1990;Ward et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Efficiency Foliar Nitrogen and Pyraclostrobin Applications for High Yielding Corn

Nelson¹,

Dudenhoeffer²,

Burdick³

et al. 2015

JAS

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Combining a foliar fertilizer and fungicide in a single application could complement soil-applied nitrogen (N) and reduce application costs. Limited research has evaluated such combinations for high-yield corn (Zea mays L.) production systems. This research evaluated the effect of mixing order of enhanced-efficiency foliar N (30-0-0-0, Nitamin) rates (0, 9, and 28 L ha -1 ) with pyraclostrobin under different crop-yield environments (soil applied N at 84, 169, and 337 kg ha -1 ) on crop injury, disease severity, chlorophyll content, grain quality, and yield at Novelty and Albany, Missouri, in 2010 and 2011. There was no effect of 30-0-0-0 at 9 or 28 L ha -1 on corn yields in low-(soil applied N at 84 kg ha -1 ) or medium-yield environments (soil applied N at 169 kg ha -1 ). In a highyield environment (soil applied N at 337 kg ha -1 at Novelty and Albany), 30-0-0-0 at 9 L ha -1 increased grain yields 0.38 Mg ha -1 (3.7%) compared to the non-treated control, but 30-0-0-0 at 28 L ha -1 did not increase yield due to 3-4% crop injury. In a high-yield environment (> 9.4 Mg ha -1 ), pyraclostrobin increased yields 3.9 to 7.1% (0.38 to 0.7 Mg ha -1 ) compared to the non-treated plants. This study found no significant effect of mixing order on corn yield response when 30-0-0-0 was applied with pyraclostrobin at 0.055 kg ai ha -1 . The severity of diseases (Cercospora zea-maydis, Puccinia sorghi, and Exserohilum turcicum), which was less than 12% depending on the treatment, was affected by soil-applied N rate, 30-0-0-0 rate, and pyraclostrobin, depending on the site-year. Pyraclostrobin at 0.11 kg ai ha -1 (7.1%) and 30-0-0-0 at 9 L ha -1 (3.7%) were the highest-yielding treatments compared to the non-treated control with good crop safety.

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Effect of Foliar Fungicides on Corn with Simulated Hail Damage

Cited by 40 publications

References 22 publications

Effect of Foliar Boron Fertilization of Fine Textured Soils on Corn Yields

Effect of Foliar Boron Fertilization of Fine Textured Soils on Corn Yields

Hail Damage Impacts on Corn Productivity: A Review

Enhanced Efficiency Foliar Nitrogen and Pyraclostrobin Applications for High Yielding Corn

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