Tar Spot

2 cornstalks split in half, with rot on the left stalk and no rot on the right stalk

Why stalks in tar spot fields disintegrated Why stalks in tar spot fields disintegrated

byTom J. Bechman

Dec 3, 2024

2 Min Read

John Deere combine covered in black from dust and tar spot harvests a cornfield

Lower yield with irrigation? That doesn’t make sense Lower yield with irrigation? That doesn’t make sense

Nov 27, 2024

2 Min Read

Tar spot on leaves in cornfield

How can you prepare for tar spot in ’25?

How can you prepare for tar spot in ’25?

byTom J. Bechman, Midwest Crops Editor

dried-down cornfield infected with tar spot

Tar spot update: Experts answer questions after tough year

Tar spot update: Experts answer questions after tough year

byTom J. Bechman, Midwest Crops Editor

Tar spot with raised black spots on leaves

Tar spot is appearing earlier. Here’s how to prepare for it

Tar spot is appearing earlier. Here’s how to prepare for it

byChris Torres, Editor, American Agriculturist

Dan Quinn looking at corn in field that's ready for harvest

Takeaway from 2024: Don’t stop scouting

Takeaway from 2024: Don’t stop scouting

byTom J. Bechman, Midwest Crops Editor

tar spot on corn leaves

Early corn yield estimates fail in face of tar spot

Early corn yield estimates fail in face of tar spot

byTom J. Bechman, Midwest Crops Editor

Dan Quinn standing in a cornfield nearly ready for harvest

Tar spot runs rampant after fungicide plays out

Tar spot runs rampant after fungicide plays out

byTom J. Bechman, Midwest Crops Editor

Two full ears of corn at the dent stage lying next to corn leaves with black dots and brown spots indicative of tar spot

Don’t spray tar spot at dent stage

Don’t spray tar spot at dent stage

byTom J. Bechman, Midwest Crops Editor

Yellow leaf spots on a corn leaf, indicative of gray leaf spot

Disease pressure mounts in Corn Belt

Disease pressure mounts in Corn Belt

byTom J. Bechman, Midwest Crops Editor

Corn leaves with small black spots indicative of tar spot

Should tar spot be treated late in season?

Should tar spot be treated late in season?

Tar spot and southern rust continue to be a problem in cornfields across the Midwest

Focus on scouting these crop concerns

Focus on scouting these crop concerns

byElizabeth Hodges, Staff Writer

A close up of corn leaves in a field with tar spot

Scout tar spot until black layer

Scout tar spot until black layer

byTom J. Bechman, Midwest Crops Editor

Small black spots on a corn leaf

Tar spot identified in Pennsylvania

Tar spot identified in Pennsylvania

Small black dots on corn leaves indicative of tar spot

Don’t miss window to control tar spot

Don’t miss window to control tar spot

close-up of tar spot

Tar spot confirmed in Michigan’s Branch County

Tar spot confirmed in Michigan’s Branch County

byJennifer Kiel, Editor, Michigan Farmer and Ohio Farmer

A close-up of a corn leaf with black spots and discoloration indicating tar spot

Studying tar spot just got easier

Studying tar spot just got easier

byTom J. Bechman, Midwest Crops Editor

A close-up of a corn leaf with tar spot

Scouting for tar spot — get ready

Scouting for tar spot — get ready

byTom J. Bechman, Midwest Crops Editor

tar spot on corn

How to manage tar spot in corn

How to manage tar spot in corn

byFarm Progress staff

tar spot on Missouri corn

Tar spot shows up in Missouri corn crops

Tar spot shows up in Missouri corn crops

byMindy Ward, Editor, Missouri Ruralist

A close up of corn leaves with tar spot symptoms

Key discovery made in tar spot battle

Key discovery made in tar spot battle

byTom J. Bechman, Midwest Crops Editor

closeup of cornstalks

Tassel time fungicide applications for tar spot

Tassel time fungicide applications for tar spot

byCurt Arens, Editor, Nebraska Farmer

peanuts and tractor

10 stories to hone your fungicide plan

10 stories to hone your fungicide plan

byStephanie Sokol

An irrigation system spraying a field of crops

What effect will irrigation have on tar spot?

What effect will irrigation have on tar spot?

byChris Torres, Editor, American Agriculturist

corn plants in a field

Is tar spot lurking in your South Dakota cornfield?

Is tar spot lurking in your South Dakota cornfield?

bySarah McNaughton-Peterson, Dakota Farmer editor

Yellow cropduster over the cornfield

Which side of tar spot debate are you on?

Which side of tar spot debate are you on?

byMindy Ward, Editor, Missouri Ruralist

A close up of tar spot on a corn leaf

How far south did tar spot travel in 2023?

How far south did tar spot travel in 2023?

byMindy Ward, Editor, Missouri Ruralist

A close-up of a corn leaf covered with black dots indicating tar spot

Good microbes could help fight tar spot

Good microbes could help fight tar spot

byTom J. Bechman, Midwest Crops Editor

A close-up of a corn leaf with gray leaf spot lesions

Bringing medical-style in-field diagnostics to agriculture

Bringing medical-style in-field diagnostics to agriculture

byTom J. Bechman, Midwest Crops Editor

Tar spot on maple leaves

Know different types of tar spot

Know different types of tar spot

byCurt Arens, Editor, Nebraska Farmer

A close-up of hands holding a corn leaf with tiny black spots

Tillage not answer to reducing tar spot risk

Tillage not answer to reducing tar spot risk

Ryan Gentle, Wyffels agronomy manager, in a cornfield

No easy button for tar spot

No easy button for tar spot

byHolly Spangler, Prairie Farmer Senior Editor

corn leaf showing signs of tar spot

Follow 6 steps to manage tar spot

Follow 6 steps to manage tar spot

byTom J. Bechman, Midwest Crops Editor

black specks on corn leaves are a sign of tar spot disease

Tough tar spot questions get answered

Tough tar spot questions get answered

byTom J. Bechman, Midwest Crops Editor

Tar spot lesions on corn leaf that's dried down

Tweak tar spot plans based on weather

Tweak tar spot plans based on weather

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