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Address mycotoxin risks from 2020 corn silage

Address mycotoxin risks from 2020 corn silage

Cows eat total mixed ration

Cows like their total mixed ration of dry hay, corn silage, haylage, high-moisture corn and liquid whey. The Weisenbecks use a skid steer to push up feed every two to three hours. An automatic scraper that cleans every two hours keeps hoof problems to a minimum.

This year, producers endured multiple challenges during the corn growing and harvesting seasonand they find themselves feeding out newly fermented corn silage while worrying about exposing their herd to higher-than-average levels of molds or mycotoxins.

Assess conditions during harvest

Mycotoxins are produced by specific molds, which cannot be completely be avoided in the process of growing and storing crops for feed. Harvest conditions are an important factor to assess your operation’s risk of mycotoxin contamination. If corn was grown under stressors like drought, weed or insect infestation or drought, the resulting silage is more susceptible to fungal infestation and could possibly lead to production of mycotoxins.

There will likely be lower the natural population of lactic acid bacteria on the plants. Yet, this risk can be offset if a research-proven forage inoculant was used at ensiling.

Understand risks to productivity

Mycotoxins can be the source of several important herd health and production problems, ranging from reduced feed intake to suppressed immune response. Ruminants are more resistant to the effects of mycotoxins than monogastric animals like pigs and poultry. However, the toxins can disrupt rumen function in important ways.

It can be risky for producers to estimate how much mycotoxin exposure a herd can withstand. Often, mycotoxin testing is performed after animals’ exhibit reduced performance or health problems – meaning producers are already dealing with the financial effects.

Researchers have found that when ingested, mycotoxins can cause lactic acid to build up. This can result in sub-acute ruminal acidosis (SARA). When SARA occurs, the animal’s ability to use the ration efficiently is impaired and can lead to other, more serious, health problems.

Maintain optimal rumen function

To avoid these consequences, do not feed visibly moldy silage.

This solves part of the problem as mycotoxin content is not necessarily related to the amount of mold seen. If contaminated feed manages to reach the feed bunk, it’s important for animals to have optimal rumen function. Producers can include a research-proven active dry yeast (ADY) probiotic in the ration to help achieve this goal.

ADY probiotics that include the strain saccharomyces cerevisiae have a high capacity to increase pH and fiber digestibility in the rumen. Probiotic feed additives can help improve rumen function and increase fiber digestion. This can help avoid reduced production due to several herd health challenges, including mycotoxins.

Lallemand Animal Nutrition aims to optimize animal performance and well-being with specific natural microbial product and service solutions. The company develops, produces and markets yeast and bacteria products ─ including probiotics, silage inoculants and yeast derivatives.

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