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Iowa Pesticide Education Program Updates Name, Elizabeth J. Buffington, Kristine J. P. Schaefer Dec 2014

Iowa Pesticide Education Program Updates Name, Elizabeth J. Buffington, Kristine J. P. Schaefer

Integrated Crop Management News

Effective December 1, the Pest Management and the Environment (PME) program at Iowa State University Extension and Outreach will be known as Pesticide Safety Education Program (PSEP). The name change better describes the programs offered, audiences served and reflects the program’s emphasis on providing educational information throughout Iowa on the safe and effective use of pesticides.


Crop Advantage Series Provides Latest Crop Porduction Information Across Iowa, Brent A. Pringnitz Nov 2014

Crop Advantage Series Provides Latest Crop Porduction Information Across Iowa, Brent A. Pringnitz

Integrated Crop Management News

Iowa State University Extension and Outreach will offer the Crop Advantage Series to producers at 13 locations across Iowa during January. Crop Advantage Series provides the latest information to promote profitable decision-making for upcoming growing seasons. Each location features a full agenda of workshops that attendees can choose from to develop a personalized agenda. ISU Extension field agronomists will present program topics focusing on local needs and production issues.


Iowa State University Graduate Named Coordinator At Feel, Integrated Crop Management News Nov 2014

Iowa State University Graduate Named Coordinator At Feel, Integrated Crop Management News

Integrated Crop Management News

The Field Extension Education Laboratory (FEEL) at Iowa State University has named Warren Pierson as the new coordinator. Starting Nov. 1, Pierson will be responsible for organizing educational events at FEEL which holds demonstration plots used by Iowa State faculty and Iowa State Extension and Outreach staff. Pierson, an ISU graduate, emphasized his M.S. research on investigating corn growth and development as he worked as a graduate research assistant managing research trials after receiving a B.S. in agronomy. The Iowa native has experience with the teaching agronomy lab at ISU as well as involvement in Extension conferences.


Hundreds Of Scn-Resistant Soybean Varieties Available For 2014, Gregory L. Tylka Oct 2014

Hundreds Of Scn-Resistant Soybean Varieties Available For 2014, Gregory L. Tylka

Integrated Crop Management News

The soybean cyst nematode (SCN) is a serious yield-reducing pathogen of soybeans. It is present in many fields throughout the Midwest, wherever soybeans are grown.

To produce profitable soybean yields in fields infested with SCN, farmers should grow SCN-resistant soybean varieties. SCN-resistant soybeans can produce high yields while keeping SCN population densities from increasing.


Pay Attention To Stewardship Requirements For Biotech Grains, Charles R. Hurburgh Oct 2014

Pay Attention To Stewardship Requirements For Biotech Grains, Charles R. Hurburgh

Integrated Crop Management News

Most of us have been following developments in biotechnology approval for many years. The most recent issue is the non-approval of certain corn events by China. Viptera (MIR162) corn has not been approved there since its introduction in 2010; Duracade, new this year, is in the same situation. The greatest impact of the Chinese situation is on distillers grains from ethanol production. China is a major importer of dried distillers grains with solubles (DDGS); much less so for whole corn.


Hold Off On Tillage This Fall, Keep Soil Covered, Mahdi Al-Kaisi Oct 2014

Hold Off On Tillage This Fall, Keep Soil Covered, Mahdi Al-Kaisi

Integrated Crop Management News

This is the time of the year when tillage becomes the number one priority for some, whether they need it or not. The question to ask is, “Do I need to till this fall?” Given the economic and environmental challenges farmers are facing, the answer in most cases is no. With the end of the growing season here and harvest under way, now is a good time to start thinking about this decision. Take into consideration your site-specific condition and whether tillage makes economic and environmental sense given the input costs associated with tillage operations as well as the impact ...


Integrated Crop Management Conference Highlights Research And New Technologies, Alison E. Robertson, Brent A. Pringnitz Oct 2014

Integrated Crop Management Conference Highlights Research And New Technologies, Alison E. Robertson, Brent A. Pringnitz

Integrated Crop Management News

Iowa State University’s Integrated Crop Management conference will be held Dec. 3-4, 2014, at the Scheman Building on the ISU campus. Online registration is available at www.aep.iastate.edu/icm. “The latest information on crop production and protection technologies will be presented, giving producers and agribusiness professionals new information to use in their operations,” said Alison Robertson, crop plant pathologist and planning committee chair.


Ag Chemical Dealer Update Meetings Scheduled, Brent A. Pringnitz Oct 2014

Ag Chemical Dealer Update Meetings Scheduled, Brent A. Pringnitz

Integrated Crop Management News

Updates on the latest crop production products and recommendations are the featured topics at meetings sponsored by Iowa State University Extension and Outreach in Iowa City on November 25 and Ames, Iowa on December 10, 2014. These meetings are an excellent opportunity for agricultural input providers to meet with Extension specialists to review current research, discuss new products, and learn of new recommendations.


More Choices Of Scn-Resistant Soybean Varieties For Iowa For 2015, Gregory L. Tylka Oct 2014

More Choices Of Scn-Resistant Soybean Varieties For Iowa For 2015, Gregory L. Tylka

Integrated Crop Management News

An effective way to manage the soybean cyst nematode (SCN) is to grow SCN-resistant soybean varieties. Resistant varieties can yield well in fields infested with the nematode and can keep SCN population densities (numbers) from greatly increasing. With soybean checkoff funding through a grant from the Iowa Soybean Association, Iowa State University personnel compile an annual list of SCN-resistant soybean varieties available to Iowa farmers. Soybean cyst nematode-resistant soybean varieties in Iowa, PM1649, was recently updated for the 2015 growing season. The 26-page publication is available at no-charge in PDF format online at the Iowa State University Extension and Outreach ...


Mycotoxins Videos Released, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers Oct 2014

Mycotoxins Videos Released, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers

Integrated Crop Management News

For a more in-depth discussion and overview of mycotoxins, the Grain Quality Initiative and the Crop Advisor Institutehave prepared two video modules, Mycotoxins in Feed and Grain Industries.


One Oft Forgotten Important Fall Chore – Sampling Fields For Scn, Gregory L. Tylka Oct 2014

One Oft Forgotten Important Fall Chore – Sampling Fields For Scn, Gregory L. Tylka

Integrated Crop Management News

Crisp, clear fall days are perfect for splitting firewood, tilling the garden under and collecting soil samples to check fields for the soybean cyst nematode (SCN). Although soil sampling for SCN might not be on most people’s list of favorite autumn chores, fall is a great time to sample fields for this pest. Reasons to sample for SCN include to check for the presence of the nematode in fields and to monitor SCN numbers in fields known to be infested with the pest.


Update On 2014 Crop Quality, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers Oct 2014

Update On 2014 Crop Quality, Charles R. Hurburgh, Alison E. Robertson, Erin Louise Bowers

Integrated Crop Management News

It seems like a broken record...weather changes have shifted expectations of new crop corn quality. Three weeks ago, somewhat wetter corn than normal but high quality was the forecast. It is clear that the wetter part will come true; early harvest moistures are generally coming in at 18 – 22 percent, which is above average but not high enough to cause severe complications in drying. Field drydown is probably nearly over so do not expect much change in moisture from here on.


Nitrogen Fertilization Rates For Corn Production, John E. Sawyer Oct 2014

Nitrogen Fertilization Rates For Corn Production, John E. Sawyer

Integrated Crop Management News

October 13, 2014 – There has been a large change in corn grain prices this fall. How might that affect recommended nitrogen (N) fertilizer or manure-N application rates, and planning for the 2015 crop? The answer depends on more than just the price of corn, but also the price of nitrogen. It is the ratio of these prices (price ratio, where the $/lb actual N is divided by the $/bu corn; example, $0.50/lb N and $3.50/bu corn is a 0.14 price ratio). Both prices are important and influence recommended N rates as the ratio reflects the ...


Fall Nitrogen Applications And Soil Temperature, John E. Sawyer Oct 2014

Fall Nitrogen Applications And Soil Temperature, John E. Sawyer

Integrated Crop Management News

If you are considering fall application of anhydrous ammonia to corn fields (the only nitrogen fertilizer recommended for fall application), remember to wait until soil temperatures cool to 50° F and continue to trend colder. The same guidance applies to manure with high ammonium N content, like liquid swine manure.


Cover Crops And Scn: What's The Connection?, Gregory L. Tylka Sep 2014

Cover Crops And Scn: What's The Connection?, Gregory L. Tylka

Integrated Crop Management News

Iowa farmers are using cover crops for erosion control and soil nutrient and pest management in their fields. There are two aspects of cover crops that relate to the biology and management of the soybean cyst nematode (SCN).


How Much Risk Of Frost Do You Have?, Mark A. Licht Sep 2014

How Much Risk Of Frost Do You Have?, Mark A. Licht

Integrated Crop Management News

The last USDA crop progress report indicates 72% of corn in or past the dent stage with 5% of the corn acres mature and soybean with 26% leaves turning color. Heat unit accumulation has been and continues to be slower than normal resulting in a crop that is not maturing as early as planned. With the 50% probability of a 28oF frost generally being mid- to late-October, there is some concern with a fall frost killing the crop before maturity is reached, especially for corn.


Watch For Stalk And Ear Rots In Corn, Alison E. Robertson Sep 2014

Watch For Stalk And Ear Rots In Corn, Alison E. Robertson

Integrated Crop Management News

As the 2014 growing season draws to a close, agronomists and farmers are reminded to scout for stalk and ear rots of corn. Stalk rots are likely to be a problem this year particularly in fields where leaf diseases occurred and fields with high yield potential. Diplodia ear rot is already prevalent in some fields.


Soybean Diseases Taking Off In Iowa, Daren S. Mueller, Tristan Mueller Aug 2014

Soybean Diseases Taking Off In Iowa, Daren S. Mueller, Tristan Mueller

Integrated Crop Management News

Several soybean diseases have popped up over the past several weeks across Iowa. While some diseases are quite severe in certain fields, others are only scattered problems in parts of the state. Regardless, it is important to scout and identify what diseases are present and to keep track of where the diseased spots are occurring in the field. This can help with variety selection and possible management of these diseases in the future.


Expected "Fly Free" Date For Hessian Fly In Iowa, Erin W. Hodgson Aug 2014

Expected "Fly Free" Date For Hessian Fly In Iowa, Erin W. Hodgson

Integrated Crop Management News

With some farmers gaining interest in using cover crops, there are questions about possible pests that may develop with introducing new plants on the farm. Consider these insect-related issues when planting crops in the fall. Hessian fly (Photo 1) is a potentially destructive pest in winter wheat; however, cultural control can minimize the potential damage and economic loss.


Revised Corn Yield Forecasts, Mark A. Licht Aug 2014

Revised Corn Yield Forecasts, Mark A. Licht

Integrated Crop Management News

With corn pollination complete and grain fill well underway, estimates of corn yield are being made across Iowa. On July 20, Corn Yield Predictions was written to provide an insight into corn yields forecasts based on the weather and management through pollination. This article is discussing a revised corn yield forecast now that grain fill is underway. The aforementioned article gives the background on the collaborative team, management/location assumptions and Hybrid-Maize model.


Update On Corn Rootworm In Iowa, Erin W. Hodgson Aug 2014

Update On Corn Rootworm In Iowa, Erin W. Hodgson

Integrated Crop Management News

Overall, corn rootworm populations have been dampened in Iowa this season. A few factors likely contributed to this decrease:

  1. An exceptionally harsh winter may have increased mortality of overwintering eggs.
  2. Saturated soils in June may have increased mortality of corn rootworm larvae.
  3. Some fields with extremely high corn rootworm populations were likely rotated out of corn, which disrupts the pests' life cycle. Since 2011, corn production has decreased in Iowa by one-half million acres according to the USDA..
  4. Cooler summer temperatures translate to a slower growth for corn rootworm larvae in the soil, and this may increase natural mortality from ...


Be On The Lookout For Brown Stem Rot In Soybean, Daren S. Mueller, Adam Sisson, Tristan Mueller Aug 2014

Be On The Lookout For Brown Stem Rot In Soybean, Daren S. Mueller, Adam Sisson, Tristan Mueller

Integrated Crop Management News

Soybean diseases are starting to show up in Iowa fields this growing season. In an On-Farm Network trial in north central Iowa, brown stem rot (BSR) was recently found. This disease is caused by the fungus Phialophora gregata, and infection can result in yield loss for Iowa farmers.


It's Palmer Time, Robert G. Hartzler Aug 2014

It's Palmer Time, Robert G. Hartzler

Integrated Crop Management News

The lack of reliable traits to distinguish Palmer amaranth and waterhemp during vegetative stages complicates efforts at stopping the spread of Palmer amaranth across the state. However, both plants should be in full reproductive mode at this time, greatly simplifying the identification of the two amaranths.


Soybean Aphid Numbers On The Rise, Erin W. Hodgson Aug 2014

Soybean Aphid Numbers On The Rise, Erin W. Hodgson

Integrated Crop Management News

Since 2000, soybean aphid has been the primary soybean insect pest in Iowa. Infestations are sporadic and unpredictable, but this insect has the ability to cause significant yield loss during periods of optimal reproduction. Several notable infestations have been reported, particularly in north-central Iowa, this week, and therefore scouting to determine population densities is strongly encouraged. Fields that have a fairly uniform infestation with low densities (e.g., 50% of plants infested with an average of 40 aphids per plant) should be closely monitored in August.


Mid-Season Soybean Diseases Out In Full Force: How To Send A Sample To Isu Diagnostic Clinic, Laura C.H. Jesse, Daren S. Mueller Jul 2014

Mid-Season Soybean Diseases Out In Full Force: How To Send A Sample To Isu Diagnostic Clinic, Laura C.H. Jesse, Daren S. Mueller

Integrated Crop Management News

Soybean samples have been arriving almost daily at the ISU Plant and Insect Diagnostic Clinic this year. Early season problems were primarily damping off diseases and problems with herbicide carryover or sometimes a combination of the two.


Northern Leaf Blight Prevalent In Iowa, Alison E. Robertson Jul 2014

Northern Leaf Blight Prevalent In Iowa, Alison E. Robertson

Integrated Crop Management News

Northern corn leaf blight (NCLB) has been reported in numerous fields in Iowa. Most of the reports have come from central and western Iowa, but since the pathogen that causes this disease is spread by wind and rain, the disease could be more widespread.


Grasshopper Activity Observed, Erin W. Hodgson Jul 2014

Grasshopper Activity Observed, Erin W. Hodgson

Integrated Crop Management News

Grasshopper activity has been noted this week in Iowa. These insects feed on grasses and weeds, and can become field crops pests. In corn and soybean, feeding is frequently, but not always, restricted to field edges. When crop injury does occur, it usually is related to drought conditions due to a reduction in natural vegetation.


July Spray Applications, Clarke Mcgrath, H. Mark Hanna Jul 2014

July Spray Applications, Clarke Mcgrath, H. Mark Hanna

Integrated Crop Management News

Applicators using ground sprayers for herbicide may be using higher speeds to catch up with weeds and cover more acres in a narrow time window. If so, they should consider the travel speed they've used to calculate appropriate nozzle size. If field speed increases by 25% (e.g., going from 12 to 15 mi/h), spray pressure for a given nozzle must increase by 56% (e.g., from 40 psi to 63 psi) to maintain output. A better choice to reduce smaller droplets and minimize drift would be to increase nozzle size.


Fungicide Thoughts For 2014 Season, Clarke Mcgrath, Daren S. Mueller, Alison E. Robertson Jul 2014

Fungicide Thoughts For 2014 Season, Clarke Mcgrath, Daren S. Mueller, Alison E. Robertson

Integrated Crop Management News

We will have a fair amount of corn tasseling shortly after the weekend — so fungicide application season is about here. In talking with farmers and retailers the last week or so, based on all the rainfall and wet soils this is shaping up to be a big year for fungicide applications, so just a few thoughts for guys "on the fence" and trying to decide whether to spray or not.


Controlling Large Weeds - Do You Feel Lucky?, Robert G. Hartzler Jul 2014

Controlling Large Weeds - Do You Feel Lucky?, Robert G. Hartzler

Integrated Crop Management News

The heavy rains across the state have made timely postemergence weed control difficult, even in fields treated with preemergence herbicides. This leads to questions as to what can be done to insure control of weeds larger than specified on herbicide labels. Keep in mind that if there was a way to improve the consistency of a herbicide on large weeds, the manufacturer probably would have included that practice on the label. This article will focus on managing large waterhemp in soybean, but many of the principles are the same with other weeds.