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Emmanuel Byamukama

Assistant Professor & SDSU Extension Plant Pathologist

605-688-4521

Plant Science Building 107
Agronomy, Horticulture & Plant Science-Box 2108
University Station
Brookings, SD 57007

Generate research-based information to help growers manage plant diseases effectively and sustainably.
Provide alerts and updates of diseases developing in crops
Help growers diagnose plant diseases affecting their field crops
Provide fungicide safety and resistance management education

Also by Emmanuel Byamukama

Gibberella ear rot and Fusarium spp. symptoms on two corn ears.

Gibberella and Fusarium Ear Rots Developing in Corn

Corn ear rots are one of the last diseases to scout for in the corn growing season, and sometimes they are ignored or forgotten entirely. Ear rots can cause yield loss in the form of grain quality at harvest, but also cause losses during storage.

A corn field with several plants showing symptoms of stalk rot.

Assess for Corn Stalk Rots

Several corn fields are beginning to show stalk rot and top dieback symptoms. Stalk rots cause the entire plant to die prematurely, which can lead to plants lodging under windy conditions making harvesting problematic.

Two leaves of corn, one showing signs of Southern Rust, the other with Common Rust.

Southern Rust Developing Late in Corn

Southern rust was found in a few corn fields scouted last week. This rust is developing very late in the season and therefore its impact on corn yield will be minimal.