scholarly journals Meta-analysis of yield response of foliar fungicide-treated hybrid corn in the United States and Ontario, Canada

PLoS ONE ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. e0217510 ◽  
Author(s):  
Kiersten A. Wise ◽  
Damon Smith ◽  
Anna Freije ◽  
Daren S. Mueller ◽  
Yuba Kandel ◽  
...  
Keyword(s):  
United States ◽  
Meta Analysis ◽  
The United States ◽  
Yield Response ◽  
Hybrid Corn ◽  
Foliar Fungicide

scholarly journals Meta-Analysis of Yield Response of Hybrid Field Corn to Foliar Fungicides in the U.S. Corn Belt

2011 ◽  
Vol 101 (9) ◽  
pp. 1122-1132 ◽  
Author(s):  
P. A. Paul ◽  
L. V. Madden ◽  
C. A. Bradley ◽  
A. E. Robertson ◽  
G. P. Munkvold ◽  
...  
Keyword(s):  
United States ◽  
Disease Severity ◽  
Meta Analysis ◽  
The United States ◽  
Yield Response ◽  
Foliar Disease ◽  
Yield Increase ◽  
Field Corn ◽  
Yield Difference ◽  
Meta Analyses

The use of foliar fungicides on field corn has increased greatly over the past 5 years in the United States in an attempt to increase yields, despite limited evidence that use of the fungicides is consistently profitable. To assess the value of using fungicides in grain corn production, random-effects meta-analyses were performed on results from foliar fungicide experiments conducted during 2002 to 2009 in 14 states across the United States to determine the mean yield response to the fungicides azoxystrobin, pyraclostrobin, propiconazole + trifloxystrobin, and propiconazole + azoxystrobin. For all fungicides, the yield difference between treated and nontreated plots was highly variable among studies. All four fungicides resulted in a significant mean yield increase relative to the nontreated plots (P < 0.05). Mean yield difference was highest for propiconazole + trifloxystrobin (390 kg/ha), followed by propiconazole + azoxystrobin (331 kg/ha) and pyraclostrobin (256 kg/ha), and lowest for azoxystrobin (230 kg/ha). Baseline yield (mean yield in the nontreated plots) had a significant effect on yield for propiconazole + azoxystrobin (P < 0.05), whereas baseline foliar disease severity (mean severity in the nontreated plots) significantly affected the yield response to pyraclostrobin, propiconazole + trifloxystrobin, and propiconazole + azoxystrobin but not to azoxystrobin. Mean yield difference was generally higher in the lowest yield and higher disease severity categories than in the highest yield and lower disease categories. The probability of failing to recover the fungicide application cost (ploss) also was estimated for a range of grain corn prices and application costs. At the 10-year average corn grain price of $0.12/kg ($2.97/bushel) and application costs of $40 to 95/ha, ploss for disease severity <5% was 0.55 to 0.98 for pyraclostrobin, 0.62 to 0.93 for propiconazole + trifloxystrobin, 0.58 to 0.89 for propiconazole + azoxystrobin, and 0.91 to 0.99 for azoxystrobin. When disease severity was >5%, the corresponding probabilities were 0.36 to 95, 0.25 to 0.69, 0.25 to 0.64, and 0.37 to 0.98 for the four fungicides. In conclusion, the high ploss values found in most scenarios suggest that the use of these foliar fungicides is unlikely to be profitable when foliar disease severity is low and yield expectation is high.

Impact of foliar fungicide timing and fungicide class on corn yield response in the United States and Ontario, Canada

2021 ◽  
Author(s):  
Kiersten A. Wise ◽  
Damon L. Smith ◽  
Anna Freije ◽  
Daren S. Mueller ◽  
Yuba R. Kandel ◽  
...  
Keyword(s):  
United States ◽  
The United States ◽  
Yield Response ◽  
Corn Yield ◽  
Foliar Fungicide

A Meta-Analysis of the Effect of Mediated Health Communication Campaigns on Behavior Change in the United States

2004 ◽  
Vol 9 (sup1) ◽  
pp. 71-96 ◽  
Author(s):  
LESLIE B. SNYDER ◽  
MARK A. HAMILTON ◽  
ELIZABETH W. MITCHELL ◽  
JAMES KIWANUKA-TONDO ◽  
FRAN FLEMING-MILICI ◽  
...  
Keyword(s):  
United States ◽  
Health Communication ◽  
Behavior Change ◽  
Meta Analysis ◽  
The United States ◽  
Communication Campaigns ◽  
Health Communication Campaigns

scholarly journals Prevalence of Financial Fraud and Scams Among Older Adults in the United States: A Systematic Review and Meta-Analysis

2017 ◽  
Vol 107 (8) ◽  
pp. e13-e21 ◽  
Author(s):  
David Burnes ◽  
Charles R. Henderson ◽  
Christine Sheppard ◽  
Rebecca Zhao ◽  
Karl Pillemer ◽  
...  
Keyword(s):  
United States ◽  
Systematic Review ◽  
Older Adults ◽  
Meta Analysis ◽  
The United States ◽  
Financial Fraud

scholarly journals Epidemics of Community-Associated Methicillin-Resistant Staphylococcus aureus in the United States: A Meta-Analysis

PLoS ONE ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. e52722 ◽  
Author(s):  
Vanja M. Dukic ◽  
Diane S. Lauderdale ◽  
Jocelyn Wilder ◽  
Robert S. Daum ◽  
Michael Z. David
Keyword(s):  
United States ◽  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Meta Analysis ◽  
The United States ◽  
Methicillin Resistant

scholarly journals Discontinuity of Cardiac Follow‐Up in Young People With Congenital Heart Disease Transitioning to Adulthood: A Systematic Review and Meta‐Analysis

2021 ◽  
Author(s):  
Philip Moons ◽  
Sandra Skogby ◽  
Ewa‐Lena Bratt ◽  
Liesl Zühlke ◽  
Ariane Marelli ◽  
...  
Keyword(s):  
United States ◽  
Systematic Review ◽  
Congenital Heart Disease ◽  
Heart Disease ◽  
Congenital Heart ◽  
Heart Defects ◽  
Meta Analysis ◽  
Transition Programs ◽  
The United States

Background The majority of people born with congenital heart disease require lifelong cardiac follow‐up. However, discontinuity of care is a recognized problem and appears to increase around the transition to adulthood. We performed a systematic review and meta‐analysis to estimate the proportion of adolescents and emerging adults with congenital heart disease discontinuing cardiac follow‐up. In pooled data, we investigated regional differences, disparities by disease complexity, and the impact of transition programs on the discontinuity of care. Methods and Results Searches were performed in PubMed, Embase, Cinahl, and Web of Science. We identified 17 studies, which enrolled 6847 patients. A random effects meta‐analysis of single proportions was performed according to the DerSimonian‐Laird method. Moderator effects were computed to explore sources for heterogeneity. Discontinuity proportions ranged from 3.6% to 62.7%, with a pooled estimated proportion of 26.1% (95% CI, 19.2%–34.6%). A trend toward more discontinuity was observed in simple heart defects (33.7%; 95% CI, 15.6%–58.3%), compared with moderate (25.7%; 95% CI, 15.2%–40.1%) or complex congenital heart disease (22.3%; 95% CI, 16.5%–29.4%) ( P =0.2372). Studies from the United States (34.0%; 95% CI, 24.3%–45.4%), Canada (25.7%; 95% CI, 17.0%–36.7%), and Europe (6.5%; 95% CI, 5.3%–7.9%) differed significantly ( P =0.0004). Transition programs were shown to have the potential to reduce discontinuity of care (12.7%; 95% CI, 2.8%–42.3%) compared with usual care (36.2%; 95% CI, 22.8%–52.2%) ( P =0.1119). Conclusions This meta‐analysis showed that there is a high proportion of discontinuity of care in young people with congenital heart disease. The highest discontinuity proportions were observed in studies from the United States and in patients with simple heart defects. It is suggested that transition programs have a protective effect. Registration URL: www.crd.york.ac.uk/prospero . Unique identifier: CRD42020182413.

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