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.