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Iowa Weeds: The Cost of Resistance in Extra Herbicides

Iowa Weeds: The Cost of Resistance in Extra Herbicides

👤By Bob Hartzler, Iowa State University Weed Specialist 🕔Nov 13, 2017

The primary impact of herbicide resistance for most Iowa farmers has been an increase in expenditures for herbicides.  Extension Weed Specialist Bob Hartzler decided to do a quick analysis of this by using ISU Extension’s annual Estimated Costs of Crop Production.

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Iowa Corn: Addressing the Edge or Border Effect on Yields

Iowa Corn: Addressing the Edge or Border Effect on Yields

👤By Mark Westgate and Rebecca Vittetoe, Iowa State University Extension Agronomists 🕔Nov 8, 2017

There have been many reports of corn along the edge of the fields yielding drastically less than the remainder of the field. In many cases, the yield loss is most obvious on the southern edge of the field, but it

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Iowa Soybeans: Know Your SCN Numbers

Iowa Soybeans: Know Your SCN Numbers

👤By Greg Tylka, Iowa State University Extension Plant Pathologist 🕔Oct 30, 2017

Soybean farmers have kept the soybean cyst nematode (SCN) “in check” for decades simply by growing SCN-resistant soybean varieties. Unfortunately, prolonged use of varieties with SCN resistance genes from a breeding line called PI 88788 has resulted in SCN populations building

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Iowa Grain Storage: Time to Turn on the Fans

Iowa Grain Storage: Time to Turn on the Fans

👤By Charles Hurburgh, Iowa State University Extension Specialist 🕔Oct 27, 2017

Up to this point in the harvest season we have been short on grain dry down and cooling weather. Corn moisture percentages have been hanging in the 20’s, sometimes in the upper 20’s. This past week eliminated much of the

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Iowa: New Dicamba Labels Impact Application Timing

Iowa: New Dicamba Labels Impact Application Timing

👤By Bob Hartzler and Meaghan Anderson, Iowa State University Extension Specialists 🕔Oct 26, 2017

The EPA recently announced changes to the new dicamba labels in response to widespread off-target plant injury in 2016. The most significant change is classification of the new dicamba formulations as Restricted Use Products. Other changes will reduce the hours available

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Iowa Corn: Sampling for Nematodes in the Fall Not Advised

Iowa Corn: Sampling for Nematodes in the Fall Not Advised

👤By Greg Tylka, Iowa State University Extension Plant Pathologist 🕔Oct 24, 2017

I’ve received lots of inquiries in the past few weeks about sampling fields for nematodes that feed on corn. Most every Iowa field has one or more different nematode species present at low numbers. But it’s only when numbers are

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Iowa Cover Crops: Fall Armyworm Feeding Noted in Southern Counties

Iowa Cover Crops: Fall Armyworm Feeding Noted in Southern Counties

👤By Rebecca Vittetoe, Iowa State University Agronomist 🕔Oct 18, 2017

Fall is usually not a time I expect to get questions about armyworms, but last week I received several questions about fall armyworms in cover crops, particularly in cereal rye, triticale, or wheat cover crops. In Iowa, fall armyworms can

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Iowa Corn: Extension Recommendations for Choosing Hybrids

Iowa Corn: Extension Recommendations for Choosing Hybrids

👤By Mark Licht, Iowa State University Extension Specialist 🕔Oct 10, 2017

When you think about which hybrids to plant next season, make sure to take into account all the relevant factors. When selecting hybrids, prioritize yield potential and risk management. There are a number of other components to consider as well, including transgenic options, disease tolerance, maturity, grain dry down, standability, stalk quality, and early season vigor ratings. Choose a diverse

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Iowa Corn: Keep an Eye Open for Stalk Rots

Iowa Corn: Keep an Eye Open for Stalk Rots

👤By Alison Robertson and Rebecca Vittetoe, Iowa State University Extension Specialists 🕔Oct 6, 2017

Over the past couple of weeks we’ve been doing stalk rot assessments at several of the ISU Research Farms including the Southeast Research and Demonstration Farm, the McNay Research Farm, and the Ames Farm. While the plants seemed to be

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Iowa Soybeans: What to Look For When Choosing Varieties

Iowa Soybeans: What to Look For When Choosing Varieties

👤By Mark Licht, Iowa State University Extension Specialist 🕔Oct 6, 2017

When looking for soybean varieties, it is important to give as much thought to the process as you give to choosing corn hybrids. If you only choose one or two soybean varieties and do not take into consideration management and environmental factors of your operation, you are likely limiting yield potential. Many of the

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