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Tag "Bob Hartzler"

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: 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 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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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: Palmer Pigweed – Add Osceola County to the Map – Increased Vigilance Needed

Iowa: Palmer Pigweed – Add Osceola County to the Map – Increased Vigilance Needed

👤By Bob Hartzler, Extension Weed Specialist, Iowa State University 🕔Aug 23, 2017

A farmer in Osceola County recently found a single Palmer amaranth in a soybean field. He removed and burned the offending plant. This brings the ‘official’ ISU count of infested counties to 50. As we’ve stressed before, Palmer amaranth is

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Dicamba Volatility in 2001: Iowa State Researchers Saw the Issue 16 Years Ago

Dicamba Volatility in 2001: Iowa State Researchers Saw the Issue 16 Years Ago

👤By Bob Hartzler, Professor of Agronomy, Iowa State University 🕔Aug 18, 2017

The following article originally appeared on the ISU Weed Science Online website.  Current research is showing that the new formulations of dicamba (Xtendimax with Vapor Grip Technology and Engenia) have not solved the volatility problem associated with dicamba.  Since the fundamentals

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Iowa: Dicamba Off-Target Injury Complaints Continue to Rise

Iowa: Dicamba Off-Target Injury Complaints Continue to Rise

👤By Bob Hartzler, Iowa State University Weed Specialist 🕔Aug 4, 2017

As of July 20, the Iowa Department of Agriculture and Land Stewardship (IDALS) had received 142 cases of pesticide misuse, historically this number has ranged from 58-85 at this time of year. Dicamba was involved in 46 of these cases. Two of the

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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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Dicamba: Tennessee’s New Rules in Force; Missouri May Temporarily Lift Ban – DTN

Dicamba: Tennessee’s New Rules in Force; Missouri May Temporarily Lift Ban – DTN

👤By Pam Smith DTN Progressive Farmer Crops Technology Editor 🕔Jul 14, 2017

The Tennessee Department of Agriculture (TDA) on Wednesday joined other Southern states by announcing additional measures to mitigate the risk of herbicides containing dicamba.  The new rules filed with the Tennessee Secretary of State extend through Oct. 1, 2017, and

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Herbicide Drift: How Low A Dose Triggers Symptoms? Surprising Answers

Herbicide Drift: How Low A Dose Triggers Symptoms? Surprising Answers

👤BY BOB HARTZLER, EXTENSION WEED SPECIALIST, IOWA STATE UNIVERSITY 🕔Jan 18, 2017 Read Full Article