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Iowa Soybeans: 8 Facts About Charcoal Rot

Iowa Soybeans: 8 Facts About Charcoal Rot

👤By Jody Korthaus and Daren Mueller, Iowa State University Extension Specialists 🕔Jul 18, 2017

1. Develops in hot, dry weather conditions. Charcoal rot is a fungal disease that is most severe in years and areas experiencing hot, dry weather. However, this disease can also cause losses when ample moisture is present, making it a

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Dicamba Drift – Why Now? Two Reasons in Iowa; Multiple Reasons in Midsouth

Dicamba Drift – Why Now? Two Reasons in Iowa; Multiple Reasons in Midsouth

👤By Bob Hartzler, Iowa State University Weed Specialist 🕔Jul 14, 2017

While off-target movement of pesticides is not a new problem, the growth regulator herbicides create a unique situation due to their ability to induce easily observed symptoms at very low doses. Large scale drift problems were experienced when the phenoxy

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Iowa Field Reports: Crops Mostly Look Good, Some Areas Need Rain

Iowa Field Reports: Crops Mostly Look Good, Some Areas Need Rain

👤By Rebecca Vittetoe, Iowa State University Agronomist 🕔Jul 12, 2017

Parts of the state are still quite dry and could use some much needed rain. Some of these areas did receive some much needed rain Monday night (July 10)/early Tuesday morning (July 11). While some areas of the state are

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Dicamba Drift Injury: Iowa Farmers Join the Club

Dicamba Drift Injury: Iowa Farmers Join the Club

👤By Bob Hartzler, Iowa State University Agronomist 🕔Jul 12, 2017

The problems experienced with off-target movement and injury in states south of Iowa, particularly Missouri, Arkansas and Tennessee have been well covered in the press, but there has been little discussion of problems in Iowa. Unfortunately, the lack of press does not mean

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Iowa Corn: Bacterial Leaf Streak Lookalikes

Iowa Corn: Bacterial Leaf Streak Lookalikes

👤By Alison Robertson, Iowa State University Plant Pathologist 🕔Jul 11, 2017

Bacterial leaf streak is a new disease of corn that was confirmed in the U.S. last year – as if we don’t have enough spots to diagnose on corn!  And, as you might expect, a lot of spots and streaks

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Iowa Field Reports: Crops Generally Look Good Despite Challenging Season

Iowa Field Reports: Crops Generally Look Good Despite Challenging Season

👤By Rebecca Vittetoe, Iowa State University 🕔Jun 28, 2017

Despite June typically being one of the wettest months of the year, it is ending to be much drier than normal across much of the state. Besides drier conditions, other common issues showing up in Iowa crop fields include weed management

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Iowa Soybeans: Time to Stop Spraying Dicamba on Xtend Beans?

Iowa Soybeans: Time to Stop Spraying Dicamba on Xtend Beans?

👤By Clarke McGrath, Iowa State University 🕔Jun 28, 2017

We are now past the Summer Solstice, which means daylight hours will be getting shorter and we will starting seeing more flowers on soybean plants in fields, which has triggered questions about when we have to stop using dicamba on

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Iowa: Corn Water Use and Evapotranspiration

Iowa: Corn Water Use and Evapotranspiration

👤By Mark Licht, Iowa State University 🕔Jun 27, 2017

Crop water use (transpiration) during the growing season is a major factor in attaining high yield potential. Soil water loss (evaporation) and crop water loss (transpiration) occur simultaneously; making predictions of evapotranspiration complex. Actual evapotranspiration values vary greatly from day to day

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Iowa: Is Palmer Pigweed Spread in a ‘Lag Phase’?

Iowa: Is Palmer Pigweed Spread in a ‘Lag Phase’?

👤By Bob Hartzler, Iowa State University 🕔Jun 23, 2017

The introduction and spread of Palmer amaranth in Iowa undoubtedly will have a significant impact on crop production and weed management in the future.  However, since the first infestations were identified I’ve been intrigued by what seemed odd behavior for

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Iowa Soybeans: Thistle Caterpillars Showing Up

Iowa Soybeans: Thistle Caterpillars Showing Up

👤By Erin Hodgson, Iowa State University 🕔Jun 21, 2017

Today while scouting a commercial field north of Ames, I was looking for soybean aphid. I didn’t see one aphid (sniff, sniff), but I did see a handful of thistle caterpillars. The caterpillars web together soybean leaves and feed inside

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