Frost has effected some parts of the region

Avoid grazing Johnsongrass, sorghum, Sudangrass, and Sorghum-Sudan crosses during frosts.

When these plants are stressed and the cell wall ruptures, cell contents mix causing the production of prussic acid or hydrocyanic acid (HCN). Once ingested by a ruminant animal, the HCN is released in the stomach and readily absorbed into the bloodstream.  The HCN does not affect oxygen from being carried by the red blood cells but it does prevent the cell from getting accepting the oxygen.  Resulting in asphyxiation at the cellular level.  Ruminant animals affected by prussic acid poisoning will exhibit bright red blood just prior to and during death. 

Frost is known to cause HCN in Johnsongrass and other sorghum crops.  To avoid livestock losses, farmers should follow these strategies:

•     Remove cattle from fields containing Johnsongrass until the first hard frost and when the grass is dry.

•     Do not allow cattle to graze for two weeks after a non-killing frost.

•     Do not allow cattle to graze at night when frost is likely.

•     Allow hay to cure properly to remove the danger of prussic acid poisoning from hay containing Johnsongrass.

Sarah Kenyon

Agronomy Specialist, Ph.D.

Ag Day in the Ozarks 2018 Presentations 

 Willard Lemaster - Head Beef Nutritionist at Furst-McNess Company

Fescue Minerals

Nutrition Strategies for the Ozarks (pdf)

Sarah Kenyon - Field Specialist in Agronomy at University of Missouri Extension Howell County

Grazing Heights & Pasture Management

The importance of Proper Grazing Height (pdf)

Nahshon Bishop - Small Farm Specialist & David Middleton - Farm Outreach Worker at Lincoln University Cooperative Extension

New Technologies for Ergonomic Hand Tools and Personal Protective Equipment

Missouri AgrAbility (web link)

Dr. Mike Peters - Veterinarian, Owner at Animal Clinic of Ava

Heard Health and Vaccination Strategies for Cattle

Vaccination Strategies for Cattle (pdf)


News & Info

FACTSHEETS >>> Randy Wiedmeier, Livestock Specialist/CES Ozark County Extension  

 The Drought- Commodity Feeding    

The Drought- Purchasing Supplemental Feeds

Fundamentals of Ration Balancing for Beef Cattle: As-Fed -vs- Dry Matter Basis Part 1

Fundamentals of Ration Balancing for Beef Cattle: Nutrient Terminology Part 2

Fundamentals of Ration Formulation for Beef Cattle: Determining the Nutrient Content of Your Forage Part 3

SW Regional Drought Survival Meetings 

Info & Handouts:

>>> Pros and Cons of Feeding Commodities

Dr. Eric Bailey, State Beef Nutrition Specialist/Columbia, MO

>>> Brief Overview of Low-Quality Forage Use in Ruminant Livestock

Randy Wiedmeier, Livestock Specialist/CES Ozark County Extension

>>> Selling Cows Versus Buying Hay

Jim Spencer, Ag Business Specialist

>>>Fall and Winter Grazing Options Following a Drought

Tim Schnakenberg, Agronomy Specialist
>>> Precautions with Nitrates and Prussic Acid  

Sarah Kenyon, Agronomy Specialist

>>> Seeding Rates, Dates and Depths for Common Missouri Forages

MU Publication G4652

>>> Moving Baled Hay from Areas Under Quarantine for Imported Fire Ant

USDA Animal and Plant Health Inspection Service

>>> Tips for Coping with Drought-Related Stress and Depression

MU Publication drought_stress

 November 2018

Ozark County Extension News & Events

Monthly Newsletter and Program Updates