Bob Hartzler | Farm Progress

Bob Hartzler

Bob Hartzler is an extension weed specialist at Iowa State University.

Latest from Bob Hartzler

Multiflora rose

Manage multiflora rose effectively in spring Manage multiflora rose effectively in spring

byMeaghan Anderson, Bob Hartzler

Jun 2, 2021

2 Min Read

sprayer in cover crops field

To terminate or not to terminate?To terminate or not to terminate?

Apr 22, 2021

2 Min Read

All from Bob Hartzler

Sprayer equipment working a field

Crop Protection

How dry soils affect preemergence herbicides

How dry soils affect preemergence herbicides

Use caution when spraying herbicide near endangered species

Use caution when spraying herbicide near endangered species

byPaul Kassel, Bob Hartzler

Palmer amaranth

Metabolic resistance in Palmer amaranth

Metabolic resistance in Palmer amaranth

Corn plants lie on the ground following a derecho storm near Polo, Illinois, on Aug. 10, 2020. The storm brought wind gusts o

VIDEO: Management of Volunteer Corn

VIDEO: Management of Volunteer Corn

waterhemp

Escaped weeds produce crop of seeds

Escaped weeds produce crop of seeds

herbicide resistance marestail+in+soy.jpg

What is a realistic goal for weed management?

What is a realistic goal for weed management?

Harvest weed seed control

Harvest weed seed control

Banner year for the weedy cukes

Banner year for the weedy cukes

Herbicide drift in 2018: How are we doing?

Herbicide drift in 2018: How are we doing?

Not all drift is created equal

Not all drift is created equal

A weed out of place

A weed out of place

Crop Protection

Think you know your pigweeds?

Think you know your pigweeds?

Crop Protection

Preemergence herbicide options for planted soybean fields

Preemergence herbicide options for planted soybean fields

Crop Protection

Is 80% of Iowa waterhemp really resistant to Group 14 herbicides?

Is 80% of Iowa waterhemp really resistant to Group 14 herbicides?

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