Arbuscular Mycorrhizal Colonization Response to Three Seed‐Applied Fungicides

Murillo-Williams, Adriana; Pedersen, Palle

doi:10.2134/agronj2007.0142

Cited by 26 publications

(18 citation statements)

References 63 publications

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“…The grower may have improved partial returns of the rhizobia–biological–fungicide–insecticide seed treatment by planting at a lower seeding rate (Cox and Cherney, 2011a). Growers at all locations seeded at their typical rates, which may have been too high to benefit fully from seed treatment combinations in this study, similar to the findings of Murillo‐Williams and Pedersen (2008).…”

Section: Resultssupporting

confidence: 58%

“…The location × seed treatment yield interaction was not associated with planting equipment at different locations, as indicated by a positive yield response to the rhizobia–biological–fungicide–insecticide seed treatment at a grain drill (Seneca County) and a row crop location (Yates County) and no response at a grain drill (Livingston County) and a row crop location (Tomkins County). Other researchers have also observed an inconsistent yield increase with the use of fungicide and/or insecticide seed treatments, despite increases in early plant populations (Bradley et al, 2001; Poag et al, 2005; Murillo‐Williams and Pedersen, 2008; Schulz and Thelen, 2008; Cox and Cherney, 2011b; Esker and Conley, 2012). The addition of the biological compound PPST 2030 to fungicide and/or insecticide seed treatments did not reduce the inconsistent yield response to soybean seed treatments in this study.…”

Section: Resultsmentioning

confidence: 97%

“…The three site‐years where positive responses occurred were characterized by wetter and colder than normal conditions after planting (Schulz and Thelen, 2008). Murillo‐Williams and Pedersen (2008) also reported that early plant populations and yield did not respond to seed‐applied fungicides (mefenoxam, fludioxonil, or mefenoxam–fludioxonil). Murillo‐Williams and Pedersen (2008) attributed the lack of yield response in part to final plant densities in the untreated control exceeding the critical threshold of 240,000 plants ha −1 for optimum yield in 0.38‐m rows in Iowa.…”

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confidence: 98%

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Soybean Seed Treatments Interact with Locations for Populations, Yield, and Partial Returns

Cox

Cherney

2014

Agronomy Journal

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Soybean [Glycine max (L.) Merr.] prices and profitability have increased recently, so growers manage the crop more intensively, including using seed treatments. Field-scale studies were conducted at four locations in New York in 2012 and 2013 to evaluate agronomic and economic responses to rhizobia (Bradyrhizobium japonicum), biological, fungicide, and insecticide seed treatments. Plant populations, yield, and partial returns had location ´ seed treatment interactions. Rhizobia, biological, and fungicide seed treatments vs. untreated seed increased plant populations by 22 and 8% but not yield at two locations. Rhizobia, biological, fungicide, and insecticide seed treatments vs. untreated seed increased plant populations (20 and 10%) and yield (7 and 4.5%) at two other locations, along with partial returns (US$155 ha -1 ) where yield increased by 7% but not where yield increased by 4.5%. Growers seeded at 383,000 to 492,000 seeds ha -1 , which may have been too high to fully realize the benefit of seed treatments. Application of rhizobia at planting vs. untreated seed did not increase yield and partial returns, even at locations where soybean had been grown only twice in the previous 10 yr. Growers who are risk averse to poor plant establishment will probably apply biological, fungicide, and insecticide seed treatments, whereas growers who are risk averse to additional inputs without a high probability of increased profit will probably not apply seed treatments or rhizobia inoculant, especially if low market prices prevail. The results of this study are site specific, so growers should conduct strip tests to determine if soybean seed treatments or rhizobia inoculants are beneficial, given their production practices, soil resources, and risk tolerance.

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 97%

mentioning

confidence: 98%

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Soybean Seed Treatments Interact with Locations for Populations, Yield, and Partial Returns

Cox

Cherney

2014

Agronomy Journal

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“…C onditions are typically cool and moist during soybean planting time in the Northeast United States (Cox et al, 2008), which extends the time that seeds are exposed to soil pathogens and insects (Murillo‐Williams and Pedersen, 2008). For example, soybean may have unsatisfactory emergence because of root infections by Pythium spp.…”

mentioning

confidence: 99%

Location, Variety, and Seeding Rate Interactions with Soybean Seed‐Applied Insecticide/Fungicides

Cox

Cherney

2011

Agronomy Journal

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Cool conditions aft er soybean [Glycine max (L.) Merr.] planting may increase soil pest incidence and reduce emergence. Fieldscale studies were conducted in 2009 and 2010 at three locations in New York on two varieties at four seeding rates (272,000, 346,000, 420,000, and 490,000 seeds ha -1 ) with and without seed-applied insecticide/fungicides to determine if treated seed enhances plant establishment, allowing for lower seeding rates for maximum yield and partial return. Plant density and yield had location × variety × seed treatment interactions. A treated vs. untreated Asgrow variety had 16 to 22% plant density increases and 4% yield increases at two locations, whereas a Pioneer variety had a 16% density increase at one location but no yield increases. At a third location, the treated vs. untreated Pioneer variety had 19 and 4% increases, respectively, whereas the Asgrow variety had no increases. Yield, which had no seeding rate × seed treatment interaction, had quadratic responses to seeding rate and early plant densities (maximum yield at 478,300 seeds and 295,300 plants ha -1 , respectively). Partial return, which had a seeding rate × seed treatment interaction, had quadratic responses to seeding rate with maximum values at 398,800 and 341,800 seeds ha -1 for untreated and treated seed, respectively. Maximum partial returns at these seeding rates ($1241-1245 ha -1 , respectively) were similar because seed treatment cost off set lower seed cost. Maximum partial return occurred at early plant densities of 248,400 plants ha -1 , but the variety × location × seed treatment interaction complicates selecting seeding rates for this plant density.

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“…Mycorrhizal species may improve tolerance to drought (e.g., 2) and salt (e.g., 22) and, in certain circumstances, improve crop yields (69). In conventional agriculture, tilled soils and those treated with certain fungicides may have decreased integrity and abundance of mycorrhizal networks (13,33,46,52). Although some mycorrhizal services may be replaced with, for example, phosphorous-containing fertilizers, other services, such as soil integrity promotion, enhanced nutrient uptake, and even heavy metal remediation, have fewer readily available substitutes.…”

Section: Biodiversity and Hungermentioning

confidence: 99%

Biological Diversity and Public Health

Bernstein

2014

Annu. Rev. Public Health

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In the wake of a species extinction event unprecedented in human history, how the variety, distribution, and abundance of life on earth may influence health has gained credence as a worthy subject for research and study at schools of public health and for consideration among policy makers. This article reviews a few of the principal ways in which health depends on biodiversity, including the discovery of new medicines, biomedical research, the provision of food, and the distribution and spread of infections. It also examines how changes in biological diversity underlie much of the global burden of disease and how a more thorough understanding of life on earth and its relationships has the potential to greatly alleviate and prevent human suffering.

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Arbuscular Mycorrhizal Colonization Response to Three Seed‐Applied Fungicides

Abstract: A gronomy J our n al • Volume 10 0 , I s sue 3 • 2 0 0 8 795

Cited by 26 publications

References 63 publications

Soybean Seed Treatments Interact with Locations for Populations, Yield, and Partial Returns

Soybean Seed Treatments Interact with Locations for Populations, Yield, and Partial Returns

Location, Variety, and Seeding Rate Interactions with Soybean Seed‐Applied Insecticide/Fungicides

Biological Diversity and Public Health

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