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Iowa Soybeans: How Fast Do Crops Dry Down in the Field?

Iowa Soybeans: How Fast Do Crops Dry Down in the Field?

👤By Sotirios Archontoulis and Mark Licht, Iowa State University Extension Specialists 🕔Sep 20, 2017

Soybean are nearing maturity across Iowa with minimal delay due to cool temperatures compared to 2016. However, soybean sensitivity to day length speeds up crop development towards physiological maturity. During senescence carbohydrates are converted into oils. Soybean seed moisture changes

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Iowa Corn: New Diseases Booklet Available from ISU Extension

Iowa Corn: New Diseases Booklet Available from ISU Extension

👤By Alison Robertson and Jody Korthaus, Iowa State University Extension Specialists 🕔Sep 20, 2017

To help farmers and agronomists identify, scout, and manage corn diseases a new Corn Diseases booklet, published by Iowa State University Extension and Outreach, is now available to crop producers and industry professionals. The up-to-date publication provides current recommendations for management, along

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Iowa Soybeans: Dicamba – How Many Hours Were Available to Spray in 2017?

Iowa Soybeans: Dicamba – How Many Hours Were Available to Spray in 2017?

👤By Bob Hartzler, Extension Weed Specialist, Iowa State University 🕔Sep 19, 2017

My colleagues at Purdue recently compiled weather data to determine how many hours would be available to apply the new dicamba products (e.g. Xtendimax with VaporGrip Technology, FeXapan with VaporGrip Technology, and Engenia) postemergence in soybean.  Several people asked what

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Iowa Harvest: Fire Prevention, Management Tips in Dry Fields

Iowa Harvest: Fire Prevention, Management Tips in Dry Fields

👤By Mark Hanna and Clarke McGrath, Iowa State University Extension Specialists 🕔Sep 14, 2017

It’s always difficult to forecast weather, but if dry field conditions persist, potential for combine and field fires this fall could be a problem. All it takes is a single high-temperature source in the engine area, or an overheated bearing

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Iowa Crop Update: Drought Stressed Crops Heading Towards Harvest

Iowa Crop Update: Drought Stressed Crops Heading Towards Harvest

👤By Rebecca Vittetoe, Iowa State University Agronomist 🕔Sep 14, 2017

As the 2017 growing season winds down, ISU Extension and Outreach field agronomists share how the crops are progressing and finishing out the season in their repressive regions across the state.    Northwest Iowa Paul Kassel (Region 2): “Signs of crop maturity

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Iowa: Corn Aphids Active in September

Iowa: Corn Aphids Active in September

👤By Erin Hodgson, Iowa State University Extension Entomologist 🕔Sep 13, 2017

In mid-August of this summer, I wasn’t hearing anything about aphids feeding on corn and I thought we weren’t going to see it this year. These aphids are highly erratic and so where and when they land are not well

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2017 Western Iowa Labor Day Palmer Amaranth Tour

2017 Western Iowa Labor Day Palmer Amaranth Tour

👤By Bob Hartzler, Extension Weed Specialist, Iowa State University 🕔Sep 6, 2017

For the past four years (maybe five) I’ve visited the first three known infestations of Palmer amaranth in western Iowa to track the status of the populations in these fields.  Following is a brief summary of  my visits to Harrison,

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Iowa Corn: Nitrogen Considerations with Dry Conditions in 2017

Iowa Corn: Nitrogen Considerations with Dry Conditions in 2017

👤By Antonio Mallarino and John Sawyer, Iowa State University Extension Agronomists 🕔Aug 31, 2017

The dry conditions in some areas of Iowa in 2017 have raised several soil fertility questions. In some cases, there has been relatively normal crop production and no need for management changes. In other situations with severely damaged crops, there

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Iowa Soybeans: When Is It Too Late to Treat for Soybean Aphid?

Iowa Soybeans: When Is It Too Late to Treat for Soybean Aphid?

👤By Erin Hodgson, Iowa State University Extension Entomologist 🕔Aug 31, 2017

I’m getting a lot of questions regarding treatment timing for soybean aphid. Mainly, when is it too late to treat? In the last week of August 2017, most fields are reaching R5/R6 and so the question is an important one.

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Iowa Soybeans: Why Use the Economic Threshold for Soybean Aphid?

Iowa Soybeans: Why Use the Economic Threshold for Soybean Aphid?

👤By Erin Hodgson, Iowa State University Extension Entomologist 🕔Aug 31, 2017

The economic threshold of 250 soybean aphids per plant, with more than 80% of plants infested and aphid populations increasing was published in 2007 to prevent populations from reaching the EIL. These values were determined by closely monitoring aphid populations in

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