Sticky traps


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In general, sciarids and phorids present more serious problems nowadays. This is probably due to the milder winters, which allow population levels to be sustained even during the winter season. It’s essential to pay sufficient attention to minimising the damage caused by these insects. Most farms know the importance of closing the doors properly, well as checking for and repairing cracks and gaps in the buildings. But, at the same time, the doors have to be opened regularly to fill and check the growing rooms, and at pic- king. And these are precisely the moments when these pests like to move from room to room. Applying a short acting product after the rooms have been filled is not usually enough.


Using nematodes is a good solution but is often less effective in places with large populations of sciarids and phorids and/or mild winters. As we know, prevention is better than cure, and is usually a lot cheaper, as the following example illustrates.


‘Wauwiler Champignons’ in Wauwil, Switzerland is located close to a cattle farm, and as a result the sciarid population is very active. The hygiene stan- dards at the farm are very high, also because organic mushrooms are produ- ced by their subsidiary ‘Fine Funghi’ nearby and hygiene is essential. Urs Zilman, the farm manager, pulls out all the stops to prevent insects in the growing rooms. He hung up some large fly traps made of the familiar yellow sticky plates. As the photo shows, the traps are placed in a frame and hung on both sides of the corridor.


I too was pleasantly surprised to see just how many insects were caught by this cheap and effective solution. Combined with nematodes, Wauwiler Champignons managed to control most of their insect problems last autumn and this winter.


By Thei Staaks


46 MUSHROOM BUSINESS


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