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Stalk Borers Worth Scouting In Iowa This Summer, Erin W. Hodgson 2019 Iowa State University

Stalk Borers Worth Scouting In Iowa This Summer, Erin W. Hodgson

Integrated Crop Management News

Within the last week, I have heard about higher-than-normal stalk borer infestations along field margins compared to previous years. According to degree-day tracking of 2019, the caterpillars should be moving from overwintering hosts to corn throughout Iowa this week.


Japanese Beetles Get A Slow Start To 2019, Erin W. Hodgson 2019 Iowa State University

Japanese Beetles Get A Slow Start To 2019, Erin W. Hodgson

Integrated Crop Management News

Several reports from ISU Field Agronomists have indicated Japanese beetles are emerging in southern Iowa. The emergence is about 7-10 days behind the last few years, due to slowly accumulating degree days in 2019. Literature shows Japanese beetle adults need about 1,030 growing degree days (base 50°F) to complete development and will continue emergence until around 2,150 degree days. Based on accumulating degree-day temperatures in 2019, Japanese beetle adults should be active in some areas of southern Iowa this week (Figure 1).


Soybean Gall Midge Confirmed In Iowa And Nebraska, Erin W. Hodgson 2019 Iowa State University

Soybean Gall Midge Confirmed In Iowa And Nebraska, Erin W. Hodgson

Integrated Crop Management News

Last year, the widespread outbreak of soybean gall midge took many farmers and entomologists by surprise. There was significant field edge injury and economic loss in at least 65 counties in Iowa, Nebraska, Minnesota, and South Dakota. A small team organized a concerted effort to learn more about the life cycle, biology and management of soybean gall midge in 2019. The first step was to establish emergence cages in various habitat types to better understand where they overwinter. We used the “corn rootworm” style traps to collect adults emerging from the ground. A series of traps in Iowa, Nebraska and ...


Submitting Samples To The Plant And Insect Diagnostic Clinic, Edward R. Zaworski, Lina M. Rodriguez Salamanca 2019 Iowa State University

Submitting Samples To The Plant And Insect Diagnostic Clinic, Edward R. Zaworski, Lina M. Rodriguez Salamanca

Integrated Crop Management News

With the crops of Iowa in the ground, it is time to start thinking about seedling diseases. The Plant and Insect Diagnostic Clinic is a resource for corn and soybean growers assessing their field throughout the season.


Staying On Top Of Weeds In 2019, Robert G. Hartzler, Meaghan J. B. Anderson 2019 Iowa State University

Staying On Top Of Weeds In 2019, Robert G. Hartzler, Meaghan J. B. Anderson

Integrated Crop Management News

While good progress has been made toward getting crops in the ground, the adverse early spring conditions are likely to complicate weed management throughout the 2019 growing season. The most important step in minimizing problems is to scout fields regularly to identify problems quickly and allow timely adjustments to management.


Nitrogen Fertilization Options With Delayed Or Rescue Applications, John E. Sawyer 2019 Iowa State University

Nitrogen Fertilization Options With Delayed Or Rescue Applications, John E. Sawyer

Integrated Crop Management News

It’s been a wait-go-stop (repeat) corn planting season this spring. Whether you planted early or are just now getting corn planted, it seems planting windows were short and rushed. In some cases this meant planting (corn/soybean) and worrying later about getting nitrogen (N) applied. And in some areas of Iowa, wetter than normal conditions are raising questions about supplemental N application. What are the options for sidedress N?


Biomethane Production From Distillery Wastewater, Zachary Christman 2019 University of Nebraska - Lincoln

Biomethane Production From Distillery Wastewater, Zachary Christman

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Distillery wastewater treatment is a great ecological problem, for example, India produces 2.7 billion liters of alcohol that results in 40 billion liters of wastewater. However, this material can be seen as a resource since 11 million cubic meters of biogas at 60% methane could be produced in addition to cleaning the water. The distillery has two options of what to do with the biogas. The first is to use the biogas to fuel the distillery making the production plant more energy efficient and removing some of the need to buy natural gas. The other is to upgrade the ...


It’S Time To Think About Sampling For Nematodes That Feed On Corn, Gregory L. Tylka 2019 Iowa State University

It’S Time To Think About Sampling For Nematodes That Feed On Corn, Gregory L. Tylka

Integrated Crop Management News

As Iowa’s corn crop gets slowly planted and established in 2019, it’s time to turn thoughts towards pests. Plant-parasitic nematodes that feed on corn can cause damage and yield loss. Some nematode species are damaging to corn at very low population densities (numbers). But most species are not harmful until population densities reach many hundreds or more per 100 cm3 (a little less than a half-cup) of soil. And then there are some nematode species that are not thought to be harmful to corn at all. It is very common for Iowa fields to have several different ...


Meta-Analysis Of Yield Response Of Foliar Fungicide-Treated Hybrid Corn In The United States And Ontario, Canada, Kiersten A. Wise, Damon Smith, Anna Freije, Daren S. Mueller, Yuba Kandel, Tom Allen, Carl A. Bradley, Emmanuel Byamukama, Martin Chilvers, Travis Faske, Andrew Friskop, Clayton Hollier, Tamra A. Jackson-Ziems, Heather Kelly, Bob Kemerait, Paul Price III, Alison Robertson, Albert Tenuta 2019 University of Kentucky Research and Education Center

Meta-Analysis Of Yield Response Of Foliar Fungicide-Treated Hybrid Corn In The United States And Ontario, Canada, Kiersten A. Wise, Damon Smith, Anna Freije, Daren S. Mueller, Yuba Kandel, Tom Allen, Carl A. Bradley, Emmanuel Byamukama, Martin Chilvers, Travis Faske, Andrew Friskop, Clayton Hollier, Tamra A. Jackson-Ziems, Heather Kelly, Bob Kemerait, Paul Price Iii, Alison Robertson, Albert Tenuta

Plant Pathology and Microbiology Publications

Background

Foliar fungicide applications to corn (Zea mays L.) occur at one or more application timings ranging from early vegetative growth stages to mid-reproductive stages. Previous studies indicated that fungicide applications are profitable under high disease pressure when applied during the tasseling to silking growth stages. Few comprehensive studies in corn have examined the impact of fungicide applications at an early vegetative growth stage (V6) compared to late application timings (VT) for yield response and return on fungicide investment (ROI) across multiple locations.

Objective

Compare yield response of fungicide application timing across multiple fungicide classes and calculate the probability of ...


Springtime Precipitation – A Tool For Estimating Nitrogen Application Need For Corn, John E. Sawyer 2019 Iowa State University

Springtime Precipitation – A Tool For Estimating Nitrogen Application Need For Corn, John E. Sawyer

Integrated Crop Management News

Wet springtime conditions typically raise questions about the status of applied nitrogen (N). Or the question, do I need to apply additional N to my cornfields? At this time we do not know what the weather/precipitation will be for the entire springtime, but the extended period of wet conditions this spring is of concern. A summary of long-term N rate trials with continuous corn and corn rotated with soybean conducted at seven ISU research and demonstration farms in Iowa from 1999 to 2016 has been an on-going basis for indicating the potential for needing an N rate greater than ...


The Effects Of Agricultural Waste-Based Compost Amendments In Organic Pest Management, Gregg T. Stephenson 2019 California Polytechnic State University, San Luis Obispo

The Effects Of Agricultural Waste-Based Compost Amendments In Organic Pest Management, Gregg T. Stephenson

Master's Theses and Project Reports

Soil-borne pests and pathogens, such as Verticillium dahliae, can devastate a wide range of annual and perennial crops. Current management options for organic production are limited and sustainable management of pathogens, weeds, and arthropods is important for staying profitable and reducing the use of harmful chemicals. Organic soil amendments play an important role in supplying some of the nutritional needs of vegetable crops and improving soil structure, while also contributing to pest control. The objective of this research was to determine the effects of grape and olive-based composts on soil pathogen load, arthropod communities, and weed biomass and diversity. Field ...


Cover Crop Options With Prevented Planting Fields, Mark A. Licht, Hugo Ramirez-Ramirez, Brian J. Lang, Aaron Saeugling, Katana Lippolis 2019 Iowa State University

Cover Crop Options With Prevented Planting Fields, Mark A. Licht, Hugo Ramirez-Ramirez, Brian J. Lang, Aaron Saeugling, Katana Lippolis

Integrated Crop Management News

Whether it's too much rain or perfectly timed rain, many fields are flooded or too wet to continue planting in many parts of Iowa. Delayed and preventative planting crop insurance dates are fast approaching with an unfavorable weather forecast. Decisions surrounding your delayed and prevented planting provision need to involve a conversation with your crop insurance provider. There is a nice article available on the Ag Decision Maker website that talks about the insurance provision implications. Additionally, there is are articles addressing Late Corn Planting Options and Late Soybean Planting Options; these articles discuss late planted yield potential. Each ...


Considerations For Baleage With First Crop Alfalfa, Dan Loy, Garland Dahlke, Erika Lundy 2019 Iowa State University

Considerations For Baleage With First Crop Alfalfa, Dan Loy, Garland Dahlke, Erika Lundy

Integrated Crop Management News

Earlier this spring, we discussed using the PEAQ method (Predictive Equations for Alfalfa Quality) to help determine when to harvest first crop alfalfa. Looking at the PEAQ measurements made around the state, we are getting close to taking the first crop alfalfa. However, the wet conditions could present some challenges with putting up the first cutting of alfalfa in a timely fashion and maintaining feed quality.


Forage Options With Prevented Planting Fields, Mark A. Licht, Hugo Ramirez-Ramirez, Brian J. Lang, Aaron Saeugling, Katana Lippolis 2019 Iowa State University

Forage Options With Prevented Planting Fields, Mark A. Licht, Hugo Ramirez-Ramirez, Brian J. Lang, Aaron Saeugling, Katana Lippolis

Integrated Crop Management News

Whether it's too much rain or perfectly timed rain, many fields are flooded or too wet to continue planting in many parts of Iowa. Delayed and preventative planting crop insurance dates are fast approaching with an unfavorable weather forecast. Decisions surrounding your delayed and prevented planting provision need to involve a conversation with your crop insurance provider. There is a nice article available on the Ag Decision Maker website that talks about the insurance provision implications. Additionally, there is are articles addressing Late Corn Planting Options and Late Soybean Planting Options; these articles discuss late planted yield potential. Each ...


Delayed Planting And Diseases In 2019, Alison E. Robertson, Daren S. Mueller, Ethan Stoetzer 2019 Iowa State University

Delayed Planting And Diseases In 2019, Alison E. Robertson, Daren S. Mueller, Ethan Stoetzer

Integrated Crop Management News

This growing season, delayed planting, combined with continued cool and wet conditions have taken their toll on crops that were planted in the brief periods of optimum weather. Given that there is already delayed emergence, and the wet and cool weather patterns are expected to continue, we could very well see continued delayed growth and development of crops. This means that we can also expect reaching grain fill later in the growing season, which creates a window of opportunity for plant diseases to impact total yield. The earlier a plant disease occurs during grain fill, the more likely it is ...


Weeds In A Wet Year, Robert G. Hartzler 2019 Iowa State University

Weeds In A Wet Year, Robert G. Hartzler

Integrated Crop Management News

The delays in planting get the headlines (for good reason), but another issue with prolonged wet periods is the inability to manage weeds and cover crops in a timely fashion. The following is a brief review of some of the problems that may be encountered.


Late-Spring Soil Nitrate Test (Lsnt) Use In 2019, John E. Sawyer, Antonio Mallarino 2019 Iowa State University

Late-Spring Soil Nitrate Test (Lsnt) Use In 2019, John E. Sawyer, Antonio Mallarino

Integrated Crop Management News

Nitrogen (N) fertilization for this year’s Iowa corn crop has been complicated by frequent and sometimes excessive rainfall from late last fall through this spring. Many farmers who normally apply N in the fall couldn’t, and spring preplant N application and corn planting has been challenging in many areas with the wet and extended cold soil conditions. Therefore, many farmers are uncertain about the N availability for corn, early post-emergence assessment of soil N supply, and the potential for supplemental sidedress N application.


Evaluating Soybean Stands, Meaghan J. B. Anderson, Rebecca K. Vittetoe 2019 Iowa State University

Evaluating Soybean Stands, Meaghan J. B. Anderson, Rebecca K. Vittetoe

Integrated Crop Management News

As of May 20, an estimated 27 percent of Iowa’s soybean crop is planted according to the USDA-NASS Iowa Crop Progress Report. Early-planted soybeans have been exposed to stressful conditions following multiple rainfall events, cold temperatures, and wide temperature swings in the last several weeks. We previously posted an article on evaluating corn stands, and many of the same issues are important when evaluating soybean stands.


Introduction To Sorghum Paper Production, Zachary Christman 2019 University of Nebraska-Lincoln

Introduction To Sorghum Paper Production, Zachary Christman

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Sorghum is a tall grass used for many commercial products such as fodder and syrup. The 10 to 15 feet stalk of the plant has lower lignin than wood and provides a fiber length of 2.31 mm in the outer covering and 1.38 mm for the leaf. Sorghum fiber makes a high quality, strong paper suitable for printing, packaging and paperboard.


Recycling Pesticide Containers, Kristine J. P. Schaefer 2019 Iowa State University

Recycling Pesticide Containers, Kristine J. P. Schaefer

Integrated Crop Management News

Handling and disposing of empty pesticide containers is a necessary part of pesticide applications and recycling containers is an environmentally friendly and responsible way of disposing of them. In 2018 763,078 pounds of pesticide containers 55 gallons and smaller were collected and recycled for the state of Iowa. Iowa ranked number one in the Midwest for containers recycled in 2018.


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