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PESTS AND DISEASES


Valve with timer and wetting the floor.


Majority of bacterial blotch where air enters Where pinheads are forming near the air entry point into the growing room, you will notice that the floor is wet below the first few metres of the air duct. When you look up, you can see condensation dripping from the duct. Steam humidification has not absorbed all the water droplets in the air at the beginning of the air duct. These droplets float through the air and will eventually fall on the bed, where the pin- heads are growing. You can see droplets of moisture on the bed. This moisture creates favourable conditions for bacterial growth, including harmful bacteria. However, this is not visible at this stage, but is revealed when the mushrooms develop later on. How can you prevent this? Wetting the floor regularly causes the water from the floor to evaporate into the air. This maintains the RH so that that little or no steam humidification is required. You should wet the floor again when it is almost completely dry. The most efficient method is to let the watering system wet the floor every two to six hours. Use a nozzle that produces large droplets, which completely wet the floor.


12 MUSHROOM BUSINESS


If you don’t have a similar system, a pipe under the bed, connected to the water supply by hoses, and with a valve operated at intervals of a few hours by a timer is a good alternative.


Bacterial blotch in second flush Bacteria blotch in the second flush is caused at the moment that water is applied after the first flush. On the first and second day of the first flush, the pinheads for the second flush start to


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