Author Archives: nutri

Higher rates gives higher yields and grade mix with Mycrofeeder

Recent data from a UK farm show significant improvements in yield going from normal 200ml/m² to 300ml/m².

On 3 flushes….

200ml                   300ml                        Yield effect from 200 to 300

8224                       8466                       ↑ 0.9 kg/m²

7381                       7866                       ↑ 1.82 kg/m²

7120                       7674                       ↑ 2.08 kg/m²

On 2 flushes….

7100                       7637                       ↑ 0.9 kg/m²

A quality improvement (grade mix) was also reported with the higher rate.

OUR RECOMMENDATION is now 300ml/m²

Alternative to cooking out

Cooking out with steam still remains the safest option when emptying growing rooms. However you must bear in mind that steam will not get your floors to a high enough temperature to kill  most mushroom pathogens, which means another strategy must be adopted.

One such strategy is using a tried and tested mushroom disinfectant like Sporekill (Nutriclean). It is ideal for cleaning growing rooms; floors, walls and shelving etc. It is, in our opinion, the best solution for floors because after  disinfection action it leaves a odourless protective film over all the tiny cracks and holes on the floor surface, sealing any remaining spores and debris settling after filling of your rooms. This stops any disease becoming airborne again and leaves surfaces clean and safe for foot traffic and packaging bases.

Don’t just take our word for it….our customers are the proof, it’s a fact that once they start using it they rarely change back to any other disinfectant and your mushrooms will never have any unsafe residues in them.

We have made a new video presentation about our disinfectant  to explain about its benefits in more detail.

Please email us for entry password and then navigate to the folder of interest eg disinfection click on “Staying ahead of risk” video.


Yield, Quality and Size right through to 4th Flush

These pictures were taken on a farm at the same time, from pinning through to 4th flush. There is no granular supplement in the compost, compost fill is 75kg/m². Yield in 3 flushes 29kg/m² and in 4 flushes 33kg/m². Note the mushroom shape and quality in all flushes, even later ones.

4th flush

DSC03671 3rd flush

DSC036652nd flush (3rd day of picking)


DSC03652Temperature on interface in later part of case run – perfect for feeding

DSC03649Just after airing



Reduction of Verticillium disease spread

“Consider what happens after a diseased crop is watered; pools of contaminated water collect on the floor and some at least will dry out. Sooner or later someone will walk on the floor and disturb debris and Verticillium spores lying on it.

Air sampling showed that it only required one person to walk down the central gangway of a cropping house with a clean dry concrete floor for the dust and spore content of the atmosphere to increase noticeably”

Doreen G Gandy, GCRI

This type of spread can be prevented by sprinkling SPOREKILL on the floor.

IMPORTANT: Picking and Mycrofeeder

One of the key benefits that our customers get when using Mycrofeeder is mushrooms staying immature for longer ie solid and closed even at the end of the flushes.

This is a time when a lot of extra weight can go into the mushrooms affecting final yield and picking rates.

When using Mycrofeeder, OBSERVE CLOSELY how the mushrooms grow out in terms of SHAPE and VEIL and you may find that you don’t have to PICK as TIGHTLY as you would normally at that moment.

Important notes on dilution of Mycrofeeder

During this  Autumn we have continued to evaluate the dosage and water volume for application onto the compost surface at or after filling.

The Mycrofeeder rate remains at 200ml/m2 but the inclusive dosage of 2l /m2 (1.8L water, 0.2L feeder) can be reduced to a range of 1.5l /m2-1.3l /m2.

Substantially this is to help minimise the “ knockback “ effect during cooler and wetter conditions whilst maintaining the correct growth into the casing layer.

This also keeps dilution of the supplement at a high rate to maintain the correct feeding to the advancing mycelium and reduce the risk of delayed growth/timing.


Seasonal changes can have a deleterious effect on the cultural establishment during the Case run period in particular.

Both the compost and casing can be less active during the first 48hrs and should be given careful consideration as to whether adjustment to the normal programme may be required.

When mycelial recovery is compromised the weaker growth is not able to feed in an optimal manner which can limit crop potential and timing.

If too much free water remains at the interface under less active conditions it is possible to wash the supplement down into the compost below the target zone.

You should expect to see a more robust growth of mycelium developing at the interface when using the Mycrofeeder and the time of airing normal as planned.

Getting 23C or more on the interface for 2-3 days at the end of the case run/start of pinning remains vitally important.