Si-Lac Extra Silage & Hay Inoculant


Whether you are making hay or making silage, Si-Lac Extra is your first choice in silage and hay inoculants. Tried and trusted in the Australian market, Si-Lac Extra uses the unique “Fresh Culture” Si-Lac technology that delivers fresh, actively growing and fast acting bacteria to your hay or silage.

Si-Lac Extra is a vacuum-packed bacterial inoculant containing 3 Bacteria:

  • Lactobacillus plantarum - which accelerates fermentation, and reduces the pH
  • Enterococcus faecium is critical to start early fermentation.
  • Lactobacillus buchneri - which limits secondary fermentation (heating) on feed-out

SI-LAC EXTRA Advantages

  • All the advantages of SI-LAC plus Lactobacillus buchneri for secondary fermentation control (heating at feedout) to keep your silage cool.
  • Will give you the ULTIMATE PERFORMANCE in silage making, hay making AND in high moisture grain.
  • Lower growth of yeast and moulds
  • Does not require continuous refrigeration
  • Increases in strength once mixed
  • Long mixed tank life
  • Suitable for all crops
  • Will not foul tanks and block nozzles
  • User friendly
  • High advantage to round bale silage feeding

High Moisture Hay

Si-Lac Extra is ideal for use when making high moisture hay, be it high quality lucerne, oaten hay, or for hay produced from failed crops.

Seasonal conditions can highlight the problem of showery weather and high humidity causing difficulties in making hay due to crops being unable to be dried sufficiently to bale in these conditions. Continued turning for drying purposes may result in loss of leaf and quality. In many cases, hay ends up mouldy and of poor quality when eventually baled with higher than desired moisture. Further problems with potential fires can arise if moist hay is stacked.

Additionally, when unfavourable seasonal conditions occur, there may be times when “failed” or poor crops that will not achieve high grain yields may be cut for hay. Most of these crops of wheat, barley, triticale, grain legumes or canola contain a mix of leaf, stem and grain heads or pods, resulting in uneven drying and high moisture levels.

In this situation, when the crop is used for hay, using an inoculant such as Si-Lac Extra is the ideal answer to these high moisture conditions.

Si-Lac Extra is an Australian developed fresh culture inoculant containing three different bacteria that create a stable temperature in the baled hay.

Si-Lac Extra aids in reducing heating and decomposition of high moisture hay by eliminating the aerobic, composting bacteria that attack high moisture feed.


  • Allows hay to be made when moisture levels are up to 25%.
  • Cost effective, offers great value for money
  • Helps maintain quality by retaining leaf through less turning.
  • Enables earlier baling, helping with the weather risk.
  • Helps to make quality hay with a higher feed value through a combination of all these points.
  • Suitable for all crops.
  • Will not foul tanks and nozzles – suitable for use with 50 mesh filters.
  • Long tank mix life – once mixed, lasts for 5-14 days depending on temperature.
  • Increases in strength – up to 10 times – once mixed.
  • SI-LAC EXTRA can be used when making small square bales, large squares, or round bales.

Important Application Guidelines

  • Always read and heed the label.
  • For best results, SI-LAC EXTRA is applied to hay as it is baled. The inoculant mixture is sprayed from a nozzle mounted in the throat of the baler over the hay after it has been picked up prior to compaction.
  • Ensure that applicators are properly calibrated to deliver the correct amount of SI-LAC EXTRA per bale and per tonne.
  • Ensure that all bales are treated. If untreated hay is baled and stacked with SI-LAC EXTRA treated hay, the untreated bales may heat and cause the whole hay-stack to catch fire.

The specially developed “Air-Tech” ULV Applicator available from Grevillia Ag is ideal for application of the inoculant mixture to the hay.

Get in touch with us today

Advice for the agricultural world

Grevillia AG

“There must be a better way.” That was the conclusion reached by businessman and farmer John Lever on his cattle property “Grevillia”.


10 Bult Dr,
Brendale QLD 4500

Phone Number

(07) 3205 1788

Customer Service

Australia: 1300 669 556
New Zealand: 0508 473 845