SUMMARY
  • Mould growth and therefore mycotoxin presence in feed materials is a common problem.
  • Mycotoxins can lead to high economic losses, millions annually through losses in performance and fertility as well as increased susceptibility to secondary diseases.
  • Mycostat restricted mould growth in broiler feed tested in laboratory conditions.

 

BACKGROUND
  • Mould growth in forage and feed on farm pre- and post-harvest is a common problem that results in loss of nutrients, reduced feed intake and production of secondary metabolites (mycotoxins).
  • The control of fungal growth in feed materials with higher moisture content is important where poor harvest conditions or certain processing conditions lead to reduced dry matter content, and predisposing the material to fungal growth and toxin production.
  • Mycotoxins can cause reduced feed intake and growth as well as reduction in immunity even at relatively low levels because they generally co-exist, increasing their negative impact on the bird.

 

METHOD

Water was added to broiler feed (11.5% moisture) to give a range of final moisture contents (14 to 18%). 4 treatments of Mycostat (0.5, 1.0, 1.5 and 2.0 kg/t) and a control were tested on 60 g of wetted feed. Each treatment was thoroughly mixed and divided into 3 x 20 g portions and then placed in a sterile, plugged test tube and incubated at 22°C and 65% relative humidity for 6 weeks.

RESULTS

  • As the moisture content increased, the levels of mould growth increased in the control sample.
  • Mycostat addition restricted mould development at all levels of application, although for the higher moisture levels, inclusion levels of 1.5 – 2.0 kg/t are required for effective control.
  • Where ambient temperatures are higher, increased doses should be used to ensure protection of the feed material.