Is your maize testing for dry matter lower than expected? This may not be the only drawback of the hot and dry summer, with higher levels of mycotoxins due to increased incidences of the fungal disease, smut (Ustilago maydis), according to Alltech UK’s ruminant technical manager David Wilde.
“Smut has been reported widely in forage maize this year and is responsible for a high percentage of stunted crops,” says Mr Wilde.
“Pressure caused by smut means plants are more susceptible to moulds which present a hidden threat at feed out,” he adds.
“On its own, smut can cause diarrhoea in cows and if known to be in the silage it is vital to provide plenty of effective fibre to mitigate the effects.”
Mycotoxins can lead to a wide range of symptoms including erratic production, reduced fertility, general lethargy and swollen hocks.
“If a mycotoxin problem is suspected, producers should withdraw or dilute contaminated feed and contact their vet,” advises Mr Wilde.
A booklet providing information on the origins, effects and treatment of mycotoxins in ruminant livestock is now available free of charge from Alltech (01780 764 512; www.alltech.com).