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Iowa State University

Life Sciences

2009

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Recommendations For Managing Soybean White Mold In 2010, Xiao-Bing Yang Dec 2009

Recommendations For Managing Soybean White Mold In 2010, Xiao-Bing Yang

Integrated Crop Management News

The 2009 growing season had record cool weather in July that was ideal for soybean white mold occurrence. The disease was widespread in the north central region of the U.S. and agronomists even in southern Iowa observed this disease in many soybean fields. In northern Iowa, patches of soybean killed by this disease were obvious in many soybean fields along the highways. Some farmers reported losses totaling more than $10,000 from this disease.


Crop Advantage Series Provides Latest Crop Production Information, Brent A. Pringnitz Dec 2009

Crop Advantage Series Provides Latest Crop Production Information, Brent A. Pringnitz

Integrated Crop Management News

If you’re involved in crop production in Iowa, plan to attend one of the 2010 Crop Advantage Series meetings near you. Sponsored by Iowa State University Extension, the meetings will be held at 13 locations across Iowa in January.


Crop And Weather Report Dec. 21, Integrated Crop Management News Dec 2009

Crop And Weather Report Dec. 21, Integrated Crop Management News

Integrated Crop Management News

Crop and weather report guests include Iowa State University Extension climatologist Elwynn Taylor, integrated pest management specialist Rich Pope, and corn agronomist Roger Elmore. On the first day of winter with snow covering most of the state and halting any remaining corn harvests, guests comment on the just released corn yield report - 2009 Iowa Crop Performance Test --- Corn.


Vitisnet: “Omics” Integration Through Grapevine Molecular Networks, Jérôme Grimplet, Grant R. Cramer, Julie Dickerson, Kathy Mathiason, John L. Van Hemert, Anne Y. Fennell Dec 2009

Vitisnet: “Omics” Integration Through Grapevine Molecular Networks, Jérôme Grimplet, Grant R. Cramer, Julie Dickerson, Kathy Mathiason, John L. Van Hemert, Anne Y. Fennell

Electrical and Computer Engineering Publications

Background

Genomic data release for the grapevine has increased exponentially in the last five years. The Vitis vinifera genome has been sequenced and Vitis EST, transcriptomic, proteomic, and metabolomic tools and data sets continue to be developed. The next critical challenge is to provide biological meaning to this tremendous amount of data by annotating genes and integrating them within their biological context. We have developed and validated a system of Grapevine Molecular Networks (VitisNet).

Methodology/Principal Findings

The sequences from the Vitis vinifera (cv. Pinot Noir PN40024) genome sequencing project and ESTs from the Vitis genus have been paired and ...


Fate And Bioavailability Of Sulfamethazine In Freshwater Ecosystems, Keri L. D. Henderson, Thomas Moorman, Joel R. Coats Dec 2009

Fate And Bioavailability Of Sulfamethazine In Freshwater Ecosystems, Keri L. D. Henderson, Thomas Moorman, Joel R. Coats

Entomology Publications

The antibiotic sulfamethazine can be transported from manured fields to surface water bodies. We investigated the degradation, fate, and bioavailability of sulfamethazine in surface water using 14C-U-phenyl-sulfamethazine in small pond water microcosms. Sulfamethazine dissipated exponentially from the water column, with the majority of loss occurring via movement into the sediment phase. Manure input significantly increased sorption and binding of sulfamethazine residues to the sediment. These results indicate sediment is a potential sink for sulfamethazine and sulfamethazine-related residues, which could have important implications for benthic organisms. Understanding the bioavailability of pharmaceuticals in environmental matrices is particularly important considering they are often ...


Veterinary Pharmaceuticals In The Environment: An Introduction, Keri L. D. Hendersn, Joel R. Coats Dec 2009

Veterinary Pharmaceuticals In The Environment: An Introduction, Keri L. D. Hendersn, Joel R. Coats

Entomology Publications

The production of swine, cattle, and poultry raised for human consumption represents a significant portion of the U.S. agricultural economy. To maximize production, livestock producers regularly use pharmaceuticals and hormones as supplements in animal feed and water to increase rates of weight gain, and prevent or treat diseases among their livestock. For example, in swine it is estimated that antibiotics are used for disease prevention and growth promotion in more than 90% of starter feeds, 75% of grower feeds, 50% of finishing feeds, and 20% of sow feeds. Equally relevant numbers are seen in beef cattle production (1-4). It ...


Amyris And Siam-Wood Essential Oils: Insect Activity Of Sesquiterpenes, Gretchen E. Paluch, Junwei Zhu, Lyric Bartholomay, Joel R. Coats Dec 2009

Amyris And Siam-Wood Essential Oils: Insect Activity Of Sesquiterpenes, Gretchen E. Paluch, Junwei Zhu, Lyric Bartholomay, Joel R. Coats

Entomology Publications

Recent investigations on the sesquiterpene-rich Amyris (Amyris balsamifera L.) and Siam-wood (Fokienia hodginsii L.) essential oils revealed significant arthropod repellency and toxicity responses. Amyris essential oil and one of its major components, elemol, were evaluated in laboratory bioassays and identified as effective mosquito repellents, specifically characterized by high levels of contact and minimal spatial repellency. Mosquito responses to catnip (Nepeta cataria L.) essential oil are characterized with high spatial activity, but lack significant contact repellency. Sampling within the staticair bioassay chamber with solid-phase microextraction provided measurements of the relative concentration and distribution of volatiles. These results supported the differences observed ...


Environmental Fate And Chemistry Of A Veterinary Antibiotic—Tylosin, Dingfei Hu, Keri L. D. Henderson, Joel R. Coats Dec 2009

Environmental Fate And Chemistry Of A Veterinary Antibiotic—Tylosin, Dingfei Hu, Keri L. D. Henderson, Joel R. Coats

Entomology Publications

Aerobic degradation, photolysis, and mobility of tylosin were investigated in the laboratory. Tylosin A is degraded with a half-life of 200 d in water, while it is stable in the dark. Tylosin C and D are relatively stable except in ultrapure water in the light. Slight increases of tylosin B and formation of two photoreaction products, isotylosin A alcohol (E,Z) and isotylosin A aldol (E,Z), were observed under exposure to light. In soil tylosin A and D has a dissipation half-life of about 1 wk. Sorption and abiotic degradation are the major factors influencing the loss of tylosin ...


Preface Of Veterinary Pharmaceuticals In The Environment, Keri Henderson, Joel R. Coats Dec 2009

Preface Of Veterinary Pharmaceuticals In The Environment, Keri Henderson, Joel R. Coats

Entomology Publications

An important symposium was presented on "Veterinary Pharmaceuticals in the Environment" at the 233rd National Meeting of the American Chemical Society on March 25-26, 2007, in Chicago, IL. The excellence and timeliness of the presentations indicated the need for an ACS Symposium Series book addressing the environmental chemistry and toxicology of this group of emerging contaminants.

The purpose of this symposium was to bring together scientists from academia, government, and industry to discuss and present data relevant to the significance of veterinary pharmaceuticals in the environment. A broad range of topics was covered, including environmental chemistry studies focusing on transport ...


Are Adjustment Clauses In Disclaimers Void As Against Public Policy?, Neil E. Harl Dec 2009

Are Adjustment Clauses In Disclaimers Void As Against Public Policy?, Neil E. Harl

Agricultural Law Digest

In a 2009 Eighth Circuit Court of Appeals case, Estate of Christiansen v. Commissioner,1 the issue of fractional or formula disclaimers was raised, with the Eighth Circuit confronted with the assertion by the Internal Revenue Service that “. . . such disclaimers should be categorically disqualified as against public policy.”2 The case involved the estate of a South Dakota rancher who had implemented a rather novel estate plan prior to her death.3 The appellate court upheld a bequest of property to a charitable foundation as a result of the daughter’s disclaimer in an amount that reflected the increased valuation ...


Cases, Regulations, And Statutes, Robert P. Achenbach Jr Dec 2009

Cases, Regulations, And Statutes, Robert P. Achenbach Jr

Agricultural Law Digest

No abstract provided.


Index To Volume 20, Nos. 1-24, Agricultural Law Digest Dec 2009

Index To Volume 20, Nos. 1-24, Agricultural Law Digest

Agricultural Law Digest

No abstract provided.


Minimize Sds And White Mold Risk To Same Field, Xiao-Bing Yang Dec 2009

Minimize Sds And White Mold Risk To Same Field, Xiao-Bing Yang

Integrated Crop Management News

Both soybean sudden death syndrome (SDS) and white mold (WM) were wide spread in Iowa during the 2009 season. The simultaneous outbreak of soybean sudden death syndrome and white mold (SDS-WM) had only occurred once previously – in east central Iowa during the 2007 growing season. This season was the first time that the two diseases were wide spread in Iowa. Many growers experienced the occurrence of SDS-WM on the same farm, some in the same field. In one session at the Iowa State University Integrated Crop Management Conference on Dec. 3 in Ames, I polled the group to learn how ...


Windthrow And Salvage Logging In An Old-Growth Hemlock-Northern Hardwoods Forest, Katharyn D. Lang, Lisa A. Schulte, Glenn R. Guntenspergen Dec 2009

Windthrow And Salvage Logging In An Old-Growth Hemlock-Northern Hardwoods Forest, Katharyn D. Lang, Lisa A. Schulte, Glenn R. Guntenspergen

Natural Resource Ecology and Management Publications

Although the initial response to salvage (also known as, post-disturbance or sanitary) logging is known to vary among system components, little is known about longer term forest recovery. We examine forest overstory, understory, soil, and microtopographic response 25 years after a 1977 severe wind disturbance on the Flambeau River State Forest in Wisconsin, USA, a portion of which was salvage logged. Within this former old-growth hemlock-northern hardwoods forest, tree dominance has shifted from Eastern hemlock (Tsuga canadensis) to broad-leaf deciduous species (Ulmus americana, Acer saccharum, Tilia americana,Populus tremuloides, and Betula alleghaniensis) in both the salvaged and unsalvaged areas. While ...


Cases, Regulations, And Statutes, Robert P. Achenbach Jr Dec 2009

Cases, Regulations, And Statutes, Robert P. Achenbach Jr

Agricultural Law Digest

No abstract provided.


Warning To Grandparents And Others: Bankruptcy Filing By A Section 529 Account Owner Can Result In Loss Of A Contribution Within Last 720 Days, Neil E. Harl Dec 2009

Warning To Grandparents And Others: Bankruptcy Filing By A Section 529 Account Owner Can Result In Loss Of A Contribution Within Last 720 Days, Neil E. Harl

Agricultural Law Digest

A recent Bankruptcy Court decision1 interpreting an amendment in the 2005 Bankruptcy Abuse Prevention and Consumer Protection Act2 has confirmed that the 2005 amendment poses a substantial risk where the account owner files bankruptcy within 720 days or less of contributions made to a Section 529 plan. Part or all of the contributions within that period became property of the bankruptcy estate (the debtor had a legal interest in the account as of the petition date) and the contributions are not fully excluded under 11 U.S.C. § 541(c)(2).3 That poses a risk that many ...


Development And Implementation Of High-Throughput Snp Genotyping In Barley, Timothy J. Close, Prasanna R. Bhat, Stefano Lonardi, Yonghui Wu, Nils Rostoks, Luke Ramsay, Arnis Druka, Nils Stein, Jan T. Svensson, Steve Wanamaker, Serdar Bozdag, Mikeal L. Roose, Matthew J. Moscou, Shiaoman Chao, Rajeev K. Varshney, Péter Szűcs, Kazuhiro Sato, Patrick M. Hayes, David E. Matthews, Andris Kleinhofs, Gary J. Muehlbauer, Joseph Deyoung, David F. Marshall, Kavitha Madishetty, Raymond D. Fenton, Pascal Condamine, Andreas Graner, Robbie Waugh Dec 2009

Development And Implementation Of High-Throughput Snp Genotyping In Barley, Timothy J. Close, Prasanna R. Bhat, Stefano Lonardi, Yonghui Wu, Nils Rostoks, Luke Ramsay, Arnis Druka, Nils Stein, Jan T. Svensson, Steve Wanamaker, Serdar Bozdag, Mikeal L. Roose, Matthew J. Moscou, Shiaoman Chao, Rajeev K. Varshney, Péter Szűcs, Kazuhiro Sato, Patrick M. Hayes, David E. Matthews, Andris Kleinhofs, Gary J. Muehlbauer, Joseph Deyoung, David F. Marshall, Kavitha Madishetty, Raymond D. Fenton, Pascal Condamine, Andreas Graner, Robbie Waugh

Plant Pathology and Microbiology Publications

Background High density genetic maps of plants have, nearly without exception, made use of marker datasets containing missing or questionable genotype calls derived from a variety of genic and non-genic or anonymous markers, and been presented as a single linear order of genetic loci for each linkage group. The consequences of missing or erroneous data include falsely separated markers, expansion of cM distances and incorrect marker order. These imperfections are amplified in consensus maps and problematic when fine resolution is critical including comparative genome analyses and map-based cloning. Here we provide a new paradigm, a high-density consensus genetic map of ...


Statement At The Hearing On Costs And Benefits Of Domestic Offsets, Dermot J. Hayes Dec 2009

Statement At The Hearing On Costs And Benefits Of Domestic Offsets, Dermot J. Hayes

Economics Presentations, Posters and Proceedings

No abstract provided.


Farm Energy: Electric Savings: Understanding Demand And 3-Phase Motor Use, H. Mark Hanna, Jay D. Harmon, Jane Flammang Dec 2009

Farm Energy: Electric Savings: Understanding Demand And 3-Phase Motor Use, H. Mark Hanna, Jay D. Harmon, Jane Flammang

Agriculture and Environment Extension Publications

Sometimes simple changes can reduce energy use on the farm. Explore details on demand charges and 3-phase motors.


Methane Flux In Cropland And Adjacent Riparian Buff Ers With Different Vegetation Covers, Dong-Gill Kim, Thomas M. Isenhart, Timothy B. Parkin, Richard C. Schultz, Thomas E. Loynachan Dec 2009

Methane Flux In Cropland And Adjacent Riparian Buff Ers With Different Vegetation Covers, Dong-Gill Kim, Thomas M. Isenhart, Timothy B. Parkin, Richard C. Schultz, Thomas E. Loynachan

Natural Resource Ecology and Management Publications

While water quality functions of conservation buffers established adjacent to cropped fields have been widely documented, the relative contribution of these re-established perennial plant systems to greenhouse gases has not been completely documented. In the case of methane (CH(4)), these systems have the potential to serve as sinks of CH(4) or may provide favorable conditions for CH(4) production. This study quantifies CH(4) flux from soils of riparian buffer systems comprised of three vegetation types and compares these fluxes with those of adjacent crop fields. We measured soil properties and diel and seasonal variations of CH(4 ...


Farm Energy: Tracking The Energy Use On Your Farm, H. Mark Hanna, Jay D. Harmon, Jane Flammang Dec 2009

Farm Energy: Tracking The Energy Use On Your Farm, H. Mark Hanna, Jay D. Harmon, Jane Flammang

Agriculture and Environment Extension Publications

Find out how to track your energy use on the farm with a simple energy log by using the provided Excel file linked within the PDF.


Southeastern Broiler Gaseous And Particulate Matter Emissions Monitoring, Robert T. Burns, Hongwei Xin, Richard S. Gates, Hong Li, Lara B. Moody, Douglas G. Overhults, John W. Earnest, Steven J. Hoff, Steven Trabue Dec 2009

Southeastern Broiler Gaseous And Particulate Matter Emissions Monitoring, Robert T. Burns, Hongwei Xin, Richard S. Gates, Hong Li, Lara B. Moody, Douglas G. Overhults, John W. Earnest, Steven J. Hoff, Steven Trabue

Agricultural and Biosystems Engineering Technical Reports and White Papers

This report describes the measurement methodologies and results of gaseous and particulate matter (PM) emissions (ammonia, carbon dioxide, hydrogen sulfide, non-methane hydrocarbon or NMHC, total suspended particulate or TSP, PM10, and PM2.5) from two typical Tyson broiler production houses located on two separate farm sites in western Kentucky. Each broiler house was 43 ft x 510 ft (13 m x 155 m), with an initial, nominal placement of 25,800 (winter) to 24,400 (summer) Cobb-Cobb straight-run broilers per flock. The broilers were grown on new or built-up litter to an average age of 52 d (50 - 54 d ...


Is Local Food More Expensive? A Consumer Price Perspective On Local And Non-Local Foods Purchased In Iowa, Rich S. Pirog, Nick W, Mccann Dec 2009

Is Local Food More Expensive? A Consumer Price Perspective On Local And Non-Local Foods Purchased In Iowa, Rich S. Pirog, Nick W, Mccann

Leopold Center Publications and Papers

Is local food more expensive than its non-local counterpart? The Leopold Center for Sustainable Agriculture’s Marketing and Food Systems Initiative conducted consumer market research in June, July, and August 2009 to examine what Iowa consumers pay for locally grown products and how these prices compare to non-local market channel prices.


Assessing China's Potential Import Demand For Distillers Dried Grain: Implications For Grain Trade, Jacinto F. Fabiosa, James Hansen, Holger Matthey, Suwen Pan, Francis Tuan Dec 2009

Assessing China's Potential Import Demand For Distillers Dried Grain: Implications For Grain Trade, Jacinto F. Fabiosa, James Hansen, Holger Matthey, Suwen Pan, Francis Tuan

CARD Staff Reports

A team of U.S. analysts visited China to assess the potential for use of distillers dried grain plus solubles (DDGS) in China's livestock sector. They examined the economics of the use of DDGS in feeds, the policy issues surrounding the use of the product, and transportation-logistic constraints in the expansion of DDGS imports. The team collected actual and secondary data to conduct a micro-economic analysis of the impact of DDGS on feed cost, solicited official and expert opinions through interviews, and conducted site visits. They found the development of the DDGS import market in China to be very ...


A Test Of Four Models To Predict The Risk Of Naturalization Of Non-Native Woody Plants In The Chicago Region, Mark P. Widrlechner, Janette R. Thompson, Emily J. Kapler, Kristen Kordecki, Philip M. Dixon, Galen Gates Dec 2009

A Test Of Four Models To Predict The Risk Of Naturalization Of Non-Native Woody Plants In The Chicago Region, Mark P. Widrlechner, Janette R. Thompson, Emily J. Kapler, Kristen Kordecki, Philip M. Dixon, Galen Gates

NCRPIS Publications and Papers

Accurate methods to predict the naturalization of non-native woody plants are key components of risk-management programs being considered by nursery and landscape professionals. The objective of this study was to evaluate four decision-tree models to predict naturalization (fi rst tested in Iowa) on two new sets of data for non-native woody plants cultivated in the Chicago region. We identifi ed life-history traits and native ranges for 193 species (52 known to naturalize and 141 not known to naturalize) in two study areas within the Chicago region. We used these datasets to test four models (one continental-scale and three regional-scale) as ...


Modeling The Effects Of Pelleting On The Logistics Of Distillers Grains Shipping, Kurt A. Rosentrater, Elif Kongar Dec 2009

Modeling The Effects Of Pelleting On The Logistics Of Distillers Grains Shipping, Kurt A. Rosentrater, Elif Kongar

Kurt A. Rosentrater

The energy security needs of energy importing nations continue to escalate. It is clear that biofuels can help meet some of the increasing need for energy. Theoretically, these can be produced from a variety of biological materials, including agricultural residues (such as corn stover and wheat straw), perennial grasses, legumes, algae, and other biological materials. Currently, however, the most heavily utilized material is corn starch. Industrial fuel ethanol production in the US primarily uses corn, because it is readily converted into fuel at a relatively low cost compared to other biomass sources. The production of corn-based ethanol in the US ...


Corn Planting Date: Understanding Plant Grwoth And Yield Response, Lori J. Abendroth, Anthony J. W. Myers, Roger W. Elmore Dec 2009

Corn Planting Date: Understanding Plant Grwoth And Yield Response, Lori J. Abendroth, Anthony J. W. Myers, Roger W. Elmore

Proceedings of the Integrated Crop Management Conference

Research was conducted to equip Iowa producers with more accurate corn planting date information based on their specific location. Objectives for this research project addressed during the presentation include: 1. What are the optimum planting windows for maximum yield? 2. How do new recommendations (2006-2009 data) compare to previous ISU recommendations (1998-2000 data)? 3. What are the risks associated with planting outside the optimum window? 4. How is plant growth and development impacted by varying planting dates? 5. Are grain yield differences correlated with differences in growth and development?


Nozzle And Droplet Size Effects On Pesticide Performance And Drift, Mark Hanna, John Kruckeberg, Matt Darr, Brian Steward Dec 2009

Nozzle And Droplet Size Effects On Pesticide Performance And Drift, Mark Hanna, John Kruckeberg, Matt Darr, Brian Steward

Proceedings of the Integrated Crop Management Conference

Efficient spray application requires applying the correct amount of pesticide in a proper manner to successfully reduce the pest population. In addition pesticide should not be allowed to drift to non-target off-site plants, insects, animals, or humans. Balancing between use of a droplet size small enough for efficacious application, yet large enough to avoid off-target drift is an important consideration for most applications.


Impact Of Fungicide-Insecticide Tank Mixes On Soybean In Iowa, Rebekah Ritson, Nathan Bestor, Alison Robertson, Matt O'Neal Dec 2009

Impact Of Fungicide-Insecticide Tank Mixes On Soybean In Iowa, Rebekah Ritson, Nathan Bestor, Alison Robertson, Matt O'Neal

Proceedings of the Integrated Crop Management Conference

In recent years, growing concern about invasive pests such as soybean aphid (Aphis glycines) and soybean rust (Phakopsora pachyrhizi) has led to dramatic increases in pesticide use on soybean. Both pests pose a serious threat to the industry, with untreated outbreaks of soybean aphid capable of reducing yields by 14-50% and reports of soybean rust resulting in yield losses of 10-80%. Many agribusinesses are now offering growers a pest management program emphasizing a calendar-based, co-application of a fungicide-insecticide tank mix. However, it is unclear if these co-application methods exhibit improvement upon current recommendations, which apply pesticides only when needed.


Corn Nematodes And Soybean Cyst Nematode: Basic Facts And Prospects For 2010, Gregory L. Tylka Dec 2009

Corn Nematodes And Soybean Cyst Nematode: Basic Facts And Prospects For 2010, Gregory L. Tylka

Proceedings of the Integrated Crop Management Conference

Nematodes are microscopic worms. Many nematode species live in the soil, and some soil-dwelling nematodes feed on plant roots. These plant-parasitic nematodes can cause considerable damage and yield loss when population densities (numbers) become high.